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HDFS-4481. Change fsimage to support snapshot file diffs. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1446000 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tsz-wo Sze 2013-02-14 00:43:28 +00:00
parent fa8bafbd46
commit 02e6b72ae1
35 changed files with 729 additions and 740 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.HDFS-2802.txt
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@ -153,3 +153,5 @@ Branch-2802 Snapshot (Unreleased)
HDFS-4446. Support file snapshots with diff lists. (szetszwo)
HDFS-4480. Eliminate the file snapshot circular linked list. (szetszwo)
HDFS-4481. Change fsimage to support snapshot file diffs. (szetszwo)

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/SnapshottableDirectoryStatus.java
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@ -39,10 +39,10 @@ public class SnapshottableDirectoryStatus {
public SnapshottableDirectoryStatus(long modification_time, long access_time,
FsPermission permission, String owner, String group, byte[] localName,
long inodeId,
int snapshotNumber, int snapshotQuota, byte[] parentFullPath) {
//TODO: fix fileId
this.dirStatus = new HdfsFileStatus(0, true, 0, 0, modification_time,
access_time, permission, owner, group, null, localName, 0L);
access_time, permission, owner, group, null, localName, inodeId);
this.snapshotNumber = snapshotNumber;
this.snapshotQuota = snapshotQuota;
this.parentFullPath = parentFullPath;

20
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelper.java
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@ -1062,14 +1062,18 @@ public class PBHelper {
if (sdirStatusProto == null) {
return null;
}
return new SnapshottableDirectoryStatus(sdirStatusProto.getDirStatus()
.getModificationTime(), sdirStatusProto.getDirStatus().getAccessTime(),
PBHelper.convert(sdirStatusProto.getDirStatus().getPermission()),
sdirStatusProto.getDirStatus().getOwner(), sdirStatusProto
.getDirStatus().getGroup(), sdirStatusProto.getDirStatus()
.getPath().toByteArray(), sdirStatusProto.getSnapshotNumber(),
sdirStatusProto.getSnapshotQuota(), sdirStatusProto.getParentFullpath()
.toByteArray());
final HdfsFileStatusProto status = sdirStatusProto.getDirStatus();
return new SnapshottableDirectoryStatus(
status.getModificationTime(),
status.getAccessTime(),
PBHelper.convert(status.getPermission()),
status.getOwner(),
status.getGroup(),
status.getPath().toByteArray(),
status.getFileId(),
sdirStatusProto.getSnapshotNumber(),
sdirStatusProto.getSnapshotQuota(),
sdirStatusProto.getParentFullpath().toByteArray());
}
public static HdfsFileStatusProto convert(HdfsFileStatus fs) {

35
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
View File

@ -303,8 +303,8 @@ public class FSDirectory implements Closeable {
newNode = new INodeFileUnderConstruction(id, permissions, replication,
preferredBlockSize, modificationTime, clientName, clientMachine, null);
} else {
newNode = new INodeFile(id, permissions, BlockInfo.EMPTY_ARRAY,
replication, modificationTime, atime, preferredBlockSize);
newNode = new INodeFile(id, null, permissions, modificationTime, atime,
BlockInfo.EMPTY_ARRAY, replication, preferredBlockSize);
}
try {
@ -766,7 +766,8 @@ public class FSDirectory implements Closeable {
INode rmdst = removedDst;
removedDst = null;
BlocksMapUpdateInfo collectedBlocks = new BlocksMapUpdateInfo();
filesDeleted = rmdst.destroySubtreeAndCollectBlocks(null, collectedBlocks);
filesDeleted = rmdst.destroySubtreeAndCollectBlocks(
null, collectedBlocks);
getFSNamesystem().removePathAndBlocks(src, collectedBlocks);
}
@ -1129,22 +1130,18 @@ public class FSDirectory implements Closeable {
return 0;
}
// check latest snapshot
// record modification
final Snapshot latestSnapshot = inodesInPath.getLatestSnapshot();
final INode snapshotCopy = ((INodeDirectory)inodesInPath.getINode(-2))
.getChild(targetNode.getLocalNameBytes(), latestSnapshot);
if (snapshotCopy == targetNode) {
// it is also in a snapshot, record modification before delete it
targetNode = targetNode.recordModification(latestSnapshot);
}
targetNode = targetNode.recordModification(latestSnapshot);
inodesInPath.setLastINode(targetNode);
// Remove the node from the namespace
final INode removed = removeLastINode(inodesInPath);
Preconditions.checkState(removed == targetNode);
removeLastINode(inodesInPath);
// set the parent's modification time
targetNode.getParent().updateModificationTime(mtime, latestSnapshot);
// collect block
final int inodesRemoved = targetNode.destroySubtreeAndCollectBlocks(
null, collectedBlocks);
if (NameNode.stateChangeLog.isDebugEnabled()) {
@ -1192,10 +1189,10 @@ public class FSDirectory implements Closeable {
* Replaces the specified INodeFile with the specified one.
*/
void replaceINodeFile(String path, INodeFile oldnode,
INodeFile newnode, Snapshot latest) throws IOException {
INodeFile newnode) throws IOException {
writeLock();
try {
unprotectedReplaceINodeFile(path, oldnode, newnode, latest);
unprotectedReplaceINodeFile(path, oldnode, newnode);
} finally {
writeUnlock();
}
@ -1203,10 +1200,10 @@ public class FSDirectory implements Closeable {
/** Replace an INodeFile and record modification for the latest snapshot. */
void unprotectedReplaceINodeFile(final String path, final INodeFile oldnode,
final INodeFile newnode, final Snapshot latest) {
final INodeFile newnode) {
Preconditions.checkState(hasWriteLock());
oldnode.getParent().replaceChild(newnode);
oldnode.getParent().replaceChild(oldnode, newnode);
/* Currently oldnode and newnode are assumed to contain the same
* blocks. Otherwise, blocks need to be removed from the blocksMap.
@ -1853,6 +1850,8 @@ public class FSDirectory implements Closeable {
INode removedNode = ((INodeDirectory)inodes[pos-1]).removeChild(
inodes[pos], inodesInPath.getLatestSnapshot());
if (removedNode != null) {
Preconditions.checkState(removedNode == inodes[pos]);
inodesInPath.setINode(pos - 1, removedNode.getParent());
INode.DirCounts counts = new INode.DirCounts();
removedNode.spaceConsumedInTree(counts);
@ -2245,8 +2244,8 @@ public class FSDirectory implements Closeable {
long mtime, long atime, PermissionStatus perm)
throws UnresolvedLinkException, QuotaExceededException {
assert hasWriteLock();
final INodeSymlink symlink = new INodeSymlink(id, target, mtime, atime,
perm);
final INodeSymlink symlink = new INodeSymlink(id, null, perm, mtime, atime,
target);
return addINode(path, symlink) ? symlink : null;
}

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java
View File

@ -331,8 +331,7 @@ public class FSEditLogLoader {
INodeFileUnderConstruction ucFile = (INodeFileUnderConstruction) oldFile;
fsNamesys.leaseManager.removeLeaseWithPrefixPath(addCloseOp.path);
INodeFile newFile = ucFile.toINodeFile(ucFile.getModificationTime());
fsDir.unprotectedReplaceINodeFile(addCloseOp.path, ucFile, newFile,
iip.getLatestSnapshot());
fsDir.unprotectedReplaceINodeFile(addCloseOp.path, ucFile, newFile);
}
break;
}

270
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormat.java
View File

@ -51,8 +51,11 @@ import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
import org.apache.hadoop.hdfs.server.common.InconsistentFSStateException;
import org.apache.hadoop.hdfs.server.namenode.INodeDirectory.INodesInPath;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot.FileDiffList;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileUnderConstructionWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotFSImageFormat;
import org.apache.hadoop.hdfs.util.ReadOnlyList;
@ -107,17 +110,13 @@ import org.apache.hadoop.io.Text;
* } for INodeSymlink
* or
* {
* containsBlock: byte (when {@link Feature#SNAPSHOT} is supported),
* [list of BlockInfo] (when {@link Feature#SNAPSHOT} is not supported or
* containsBlock is true),
* [list of BlockInfo]
* [list of FileDiff]
* {
* snapshotFileSize: long (negative is the file is not a snapshot copy),
* isINodeFileUnderConstructionSnapshot: byte (if snapshotFileSize
* is positive),
* isINodeFileUnderConstructionSnapshot: byte,
* {clientName: short + byte[], clientMachine: short + byte[]} (when
* isINodeFileUnderConstructionSnapshot is true),
* isINodeFileWithSnapshot: byte (if snapshotFileSize is negative),
* } (when {@link Feature#SNAPSHOT} is supported),
* } (when {@link Feature#SNAPSHOT} is supported and writing snapshotINode),
* fsPermission: short, PermissionStatus
* } for INodeFile
* }
@ -128,8 +127,8 @@ import org.apache.hadoop.io.Text;
* {
* numberOfSnapshots: int,
* [list of Snapshot] (when NumberOfSnapshots is positive),
* numberOfSnapshotDiffs: int,
* [list of SnapshotDiff] (NumberOfSnapshotDiffs is positive),
* numberOfDirectoryDiffs: int,
* [list of DirectoryDiff] (NumberOfDirectoryDiffs is positive),
* number of children that are directories,
* [list of INodeDirectoryInfo of the directory children] (includes
* snapshot copies of deleted sub-directories)
@ -141,9 +140,9 @@ import org.apache.hadoop.io.Text;
* the name of the snapshot)
* }
*
* SnapshotDiff {
* childrenSize: int,
* DirectoryDiff {
* full path of the root of the associated Snapshot: short + byte[],
* childrenSize: int,
* isSnapshotRoot: byte,
* snapshotINodeIsNotNull: byte (when isSnapshotRoot is false),
* snapshotINode: INodeDirectory (when SnapshotINodeIsNotNull is true), Diff
@ -153,6 +152,13 @@ import org.apache.hadoop.io.Text;
* createdListSize: int, [Local name of INode in created list],
* deletedListSize: int, [INode in deleted list: INodeInfo]
* }
*
* FileDiff {
* full path of the root of the associated Snapshot: short + byte[],
* fileSize: long,
* snapshotINodeIsNotNull: byte,
* snapshotINode: INodeFile (when SnapshotINodeIsNotNull is true), Diff
* }
* </pre>
*/
@InterfaceAudience.Private
@ -374,23 +380,21 @@ public class FSImageFormat {
if (in.readShort() != 0) {
throw new IOException("First node is not root");
}
INode root = loadINode(in);
final INode root = loadINode(null, false, in);
// update the root's attributes
updateRootAttr(root);
}
/** Load children nodes for the parent directory. */
private void loadChildren(INodeDirectory parent, DataInputStream in)
private int loadChildren(INodeDirectory parent, DataInputStream in)
throws IOException {
int numChildren = in.readInt();
for (int i = 0; i < numChildren; i++) {
// load single inode
byte[] localName = new byte[in.readShort()];
in.readFully(localName); // read local name
INode newNode = loadINode(in); // read rest of inode
newNode.setLocalName(localName);
INode newNode = loadINodeWithLocalName(false, in);
addToParent(parent, newNode);
}
return numChildren;
}
/**
@ -404,28 +408,21 @@ public class FSImageFormat {
final INodeDirectory parent = INodeDirectory.valueOf(
namesystem.dir.rootDir.getNode(parentPath, false), parentPath);
// Step 2. Load children nodes under parent
loadChildren(parent, in);
// Step 3. Load snapshots if parent is snapshottable
// Step 2. Load snapshots if parent is snapshottable
int numSnapshots = in.readInt();
INodeDirectorySnapshottable snapshottableParent = null;
if (numSnapshots >= 0) {
snapshottableParent = (INodeDirectorySnapshottable) parent;
final INodeDirectorySnapshottable snapshottableParent
= INodeDirectorySnapshottable.valueOf(parent, parentPath);
// load snapshots and snapshotQuota
SnapshotFSImageFormat.loadSnapshotList(snapshottableParent,
numSnapshots, in, this);
}
// Step 3. Load children nodes under parent
loadChildren(parent, in);
// Step 4. load SnapshotDiff list
int numSnapshotDiffs = in.readInt();
if (numSnapshotDiffs >= 0) {
INodeDirectoryWithSnapshot parentWithSnapshot =
(INodeDirectoryWithSnapshot) parent;
// load SnapshotDiff list
SnapshotFSImageFormat.loadSnapshotDiffList(parentWithSnapshot,
numSnapshotDiffs, in, this);
}
// Step 4. load Directory Diff List
SnapshotFSImageFormat.loadDirectoryDiffList(parent, in, this);
// Recursively load sub-directories, including snapshot copies of deleted
// directories
@ -444,22 +441,9 @@ public class FSImageFormat {
*/
private int loadDirectory(DataInputStream in) throws IOException {
String parentPath = FSImageSerialization.readString(in);
FSDirectory fsDir = namesystem.dir;
final INodeDirectory parent = INodeDirectory.valueOf(
fsDir.rootDir.getNode(parentPath, true), parentPath);
int numChildren = in.readInt();
for(int i=0; i<numChildren; i++) {
// load single inode
byte[] localName = new byte[in.readShort()];
in.readFully(localName); // read local name
INode newNode = loadINode(in); // read rest of inode
// add to parent
newNode.setLocalName(localName);
addToParent(parent, newNode);
}
return numChildren;
namesystem.dir.rootDir.getNode(parentPath, true), parentPath);
return loadChildren(parent, in);
}
/**
@ -477,7 +461,8 @@ public class FSImageFormat {
INodeDirectory parentINode = fsDir.rootDir;
for (long i = 0; i < numFiles; i++) {
pathComponents = FSImageSerialization.readPathComponents(in);
INode newNode = loadINode(in);
final INode newNode = loadINode(pathComponents[pathComponents.length-1],
false, in);
if (isRoot(pathComponents)) { // it is the root
// update the root's attributes
@ -491,7 +476,6 @@ public class FSImageFormat {
}
// add new inode
newNode.setLocalName(pathComponents[pathComponents.length-1]);
addToParent(parentINode, newNode);
}
}
@ -524,9 +508,11 @@ public class FSImageFormat {
// Add file->block mapping
final INodeFile file = (INodeFile)child;
final BlockInfo[] blocks = file.getBlocks();
final BlockManager bm = namesystem.getBlockManager();
for (int i = 0; i < blocks.length; i++) {
file.setBlock(i, bm.addBlockCollection(blocks[i], file));
if (blocks != null) {
final BlockManager bm = namesystem.getBlockManager();
for (int i = 0; i < blocks.length; i++) {
file.setBlock(i, bm.addBlockCollection(blocks[i], file));
}
}
}
}
@ -535,6 +521,15 @@ public class FSImageFormat {
public FSDirectory getFSDirectoryInLoading() {
return namesystem.dir;
}
public INode loadINodeWithLocalName(boolean isSnapshotINode,
DataInputStream in) throws IOException {
final byte[] localName = new byte[in.readShort()];
in.readFully(localName);
final INode inode = loadINode(localName, isSnapshotINode, in);
inode.setLocalName(localName);
return inode;
}
/**
* load an inode from fsimage except for its name
@ -542,45 +537,43 @@ public class FSImageFormat {
* @param in data input stream from which image is read
* @return an inode
*/
public INode loadINode(DataInputStream in) throws IOException {
long modificationTime = 0;
INode loadINode(final byte[] localName, boolean isSnapshotINode,
DataInputStream in) throws IOException {
final int imgVersion = getLayoutVersion();
final long inodeId = namesystem.allocateNewInodeId();
final short replication = namesystem.getBlockManager().adjustReplication(
in.readShort());
final long modificationTime = in.readLong();
long atime = 0;
long blockSize = 0;
long computeFileSize = -1;
boolean snapshottable = false;
boolean withSnapshot = false;
int imgVersion = getLayoutVersion();
long inodeId = namesystem.allocateNewInodeId();
short replication = in.readShort();
replication = namesystem.getBlockManager().adjustReplication(replication);
modificationTime = in.readLong();
if (LayoutVersion.supports(Feature.FILE_ACCESS_TIME, imgVersion)) {
atime = in.readLong();
}
blockSize = in.readLong();
int numBlocks = in.readInt();
BlockInfo blocks[] = null;
final long blockSize = in.readLong();
final int numBlocks = in.readInt();
String clientName = "";
String clientMachine = "";
boolean underConstruction = false;
if (numBlocks >= 0) {
// to indicate INodeFileWithSnapshot, blocks may be set as null while
// numBlocks is set to 0
blocks = LayoutVersion.supports(Feature.SNAPSHOT, imgVersion) ? (in
.readBoolean() ? new BlockInfo[numBlocks] : null)
: new BlockInfo[numBlocks];
// file
for (int j = 0; j < numBlocks; j++) {
blocks[j] = new BlockInfo(replication);
blocks[j].readFields(in);
// read blocks
BlockInfo[] blocks = null;
if (numBlocks > 0) {
blocks = new BlockInfo[numBlocks];
for (int j = 0; j < numBlocks; j++) {
blocks[j] = new BlockInfo(replication);
blocks[j].readFields(in);
}
}
String clientName = "";
String clientMachine = "";
boolean underConstruction = false;
FileDiffList fileDiffs = null;
if (LayoutVersion.supports(Feature.SNAPSHOT, imgVersion)) {
computeFileSize = in.readLong();
if (computeFileSize < 0) {
} else {
// read diffs
fileDiffs = SnapshotFSImageFormat.loadFileDiffList(in, this);
if (isSnapshotINode) {
underConstruction = in.readBoolean();
if (underConstruction) {
clientName = FSImageSerialization.readString(in);
@ -588,38 +581,56 @@ public class FSImageFormat {
}
}
}
}
// get quota only when the node is a directory
long nsQuota = -1L;
if (blocks == null && numBlocks == -1) {
nsQuota = in.readLong();
}
long dsQuota = -1L;
if (LayoutVersion.supports(Feature.DISKSPACE_QUOTA, imgVersion)
&& blocks == null && numBlocks == -1) {
dsQuota = in.readLong();
}
if (LayoutVersion.supports(Feature.SNAPSHOT, imgVersion)
&& blocks == null && numBlocks == -1) {
snapshottable = in.readBoolean();
if (!snapshottable) {
withSnapshot = in.readBoolean();
}
}
// Read the symlink only when the node is a symlink
String symlink = "";
if (numBlocks == -2) {
symlink = Text.readString(in);
}
PermissionStatus permissions = PermissionStatus.read(in);
return INode.newINode(inodeId, permissions, blocks, symlink, replication,
modificationTime, atime, nsQuota, dsQuota, blockSize, numBlocks,
computeFileSize, snapshottable, withSnapshot,
underConstruction, clientName, clientMachine);
final PermissionStatus permissions = PermissionStatus.read(in);
// return
final INodeFile file = new INodeFile(inodeId, localName, permissions,
modificationTime, atime, blocks, replication, blockSize);
return fileDiffs != null? new INodeFileWithSnapshot(file, fileDiffs)
: underConstruction? new INodeFileUnderConstruction(
file, clientName, clientMachine, null)
: file;
} else if (numBlocks == -1) {
//directory
//read quotas
final long nsQuota = in.readLong();
long dsQuota = -1L;
if (LayoutVersion.supports(Feature.DISKSPACE_QUOTA, imgVersion)) {
dsQuota = in.readLong();
}
//read snapshot info
boolean snapshottable = false;
boolean withSnapshot = false;
if (LayoutVersion.supports(Feature.SNAPSHOT, imgVersion)) {
snapshottable = in.readBoolean();
if (!snapshottable) {
withSnapshot = in.readBoolean();
}
}
final PermissionStatus permissions = PermissionStatus.read(in);
//return
final INodeDirectory dir = nsQuota >= 0 || dsQuota >= 0?
new INodeDirectoryWithQuota(inodeId, localName, permissions,
modificationTime, nsQuota, dsQuota)
: new INodeDirectory(inodeId, localName, permissions, modificationTime);
return snapshottable ? new INodeDirectorySnapshottable(dir)
: withSnapshot ? new INodeDirectoryWithSnapshot(dir)
: dir;
} else if (numBlocks == -2) {
//symlink
final String symlink = Text.readString(in);
final PermissionStatus permissions = PermissionStatus.read(in);
return new INodeSymlink(inodeId, localName, permissions,
modificationTime, atime, symlink);
}
throw new IOException("Unknown inode type: numBlocks=" + numBlocks);
}
private void loadFilesUnderConstruction(DataInputStream in,
@ -630,16 +641,22 @@ public class FSImageFormat {
LOG.info("Number of files under construction = " + size);
for (int i = 0; i < size; i++) {
INodeFileUnderConstruction cons =
FSImageSerialization.readINodeUnderConstruction(in, supportSnapshot);
INodeFileUnderConstruction cons
= FSImageSerialization.readINodeUnderConstruction(in);
// verify that file exists in namespace
String path = cons.getLocalName();
final INodesInPath iip = fsDir.getLastINodeInPath(path);
INodeFile oldnode = INodeFile.valueOf(iip.getINode(0), path);
cons.setLocalName(oldnode.getLocalNameBytes());
fsDir.unprotectedReplaceINodeFile(path, oldnode, cons,
iip.getLatestSnapshot());
cons.setParent(oldnode.getParent());
if (oldnode instanceof INodeFileWithSnapshot) {
cons = new INodeFileUnderConstructionWithSnapshot(cons,
((INodeFileWithSnapshot)oldnode).getDiffs());
}
fsDir.unprotectedReplaceINodeFile(path, oldnode, cons);
namesystem.leaseManager.addLease(cons.getClientName(), path);
}
}
@ -892,10 +909,7 @@ public class FSImageFormat {
out.write(snapshotFullPathBytes);
}
// 2. Write children INode
dirNum += saveChildren(children, out);
// 3. Write INodeDirectorySnapshottable#snapshotsByNames to record all
// 2. Write INodeDirectorySnapshottable#snapshotsByNames to record all
// Snapshots
if (current instanceof INodeDirectorySnapshottable) {
INodeDirectorySnapshottable snapshottableNode =
@ -904,14 +918,12 @@ public class FSImageFormat {
} else {
out.writeInt(-1); // # of snapshots
}
// 3. Write children INode
dirNum += saveChildren(children, out);
// 4. Write SnapshotDiff lists.
if (current instanceof INodeDirectoryWithSnapshot) {
INodeDirectoryWithSnapshot sNode = (INodeDirectoryWithSnapshot) current;
SnapshotFSImageFormat.saveSnapshotDiffs(sNode, out);
} else {
out.writeInt(-1); // # of SnapshotDiffs
}
// 4. Write DirectoryDiff lists, if there is any.
SnapshotFSImageFormat.saveDirectoryDiffList(current, out);
// Write sub-tree of sub-directories, including possible snapshots of
// deleted sub-directories

152
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageSerialization.java
View File

@ -33,11 +33,9 @@ import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoUnderConstruction;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileUnderConstructionWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotFSImageFormat;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.ShortWritable;
import org.apache.hadoop.io.Text;
@ -81,16 +79,35 @@ public class FSImageSerialization {
final FsPermission FILE_PERM = new FsPermission((short) 0);
}
private static void writePermissionStatus(INode inode, DataOutput out
) throws IOException {
final FsPermission p = TL_DATA.get().FILE_PERM;
p.fromShort(inode.getFsPermissionShort());
PermissionStatus.write(out, inode.getUserName(), inode.getGroupName(), p);
}
private static void writeBlocks(final Block[] blocks,
final DataOutputStream out) throws IOException {
if (blocks == null) {
out.writeInt(0);
} else {
out.writeInt(blocks.length);
for (Block blk : blocks) {
blk.write(out);
}
}
}
// Helper function that reads in an INodeUnderConstruction
// from the input stream
//
static INodeFileUnderConstruction readINodeUnderConstruction(
DataInputStream in, boolean supportSnapshot) throws IOException {
boolean withSnapshot = false;
DataInputStream in) throws IOException {
byte[] name = readBytes(in);
short blockReplication = in.readShort();
long modificationTime = in.readLong();
long preferredBlockSize = in.readLong();
int numBlocks = in.readInt();
BlockInfo[] blocks = new BlockInfo[numBlocks];
Block blk = new Block();
@ -105,9 +122,6 @@ public class FSImageSerialization {
blocks[i] = new BlockInfoUnderConstruction(
blk, blockReplication, BlockUCState.UNDER_CONSTRUCTION, null);
}
if (supportSnapshot) {
withSnapshot = in.readBoolean();
}
PermissionStatus perm = PermissionStatus.read(in);
String clientName = readString(in);
String clientMachine = readString(in);
@ -118,11 +132,9 @@ public class FSImageSerialization {
assert numLocs == 0 : "Unexpected block locations";
//TODO: get inodeId from fsimage after inodeId is persisted
INodeFileUnderConstruction node = new INodeFileUnderConstruction(
return new INodeFileUnderConstruction(
INodeId.GRANDFATHER_INODE_ID, name, blockReplication, modificationTime,
preferredBlockSize, blocks, perm, clientName, clientMachine, null);
return withSnapshot ? new INodeFileUnderConstructionWithSnapshot(node)
: node;
}
// Helper function that writes an INodeUnderConstruction
@ -136,19 +148,47 @@ public class FSImageSerialization {
out.writeShort(cons.getFileReplication());
out.writeLong(cons.getModificationTime());
out.writeLong(cons.getPreferredBlockSize());
int nrBlocks = cons.getBlocks().length;
out.writeInt(nrBlocks);
for (int i = 0; i < nrBlocks; i++) {
cons.getBlocks()[i].write(out);
}
out.writeBoolean(cons instanceof INodeFileUnderConstructionWithSnapshot);
writeBlocks(cons.getBlocks(), out);
cons.getPermissionStatus().write(out);
writeString(cons.getClientName(), out);
writeString(cons.getClientMachine(), out);
out.writeInt(0); // do not store locations of last block
}
/**
* Serialize a {@link INodeFile} node
* @param node The node to write
* @param out The {@link DataOutputStream} where the fields are written
* @param writeBlock Whether to write block information
*/
public static void writeINodeFile(INodeFile file, DataOutputStream out,
boolean writeUnderConstruction) throws IOException {
writeLocalName(file, out);
out.writeShort(file.getFileReplication());
out.writeLong(file.getModificationTime());
out.writeLong(file.getAccessTime());
out.writeLong(file.getPreferredBlockSize());
writeBlocks(file.getBlocks(), out);
SnapshotFSImageFormat.saveFileDiffList(file, out);
if (writeUnderConstruction) {
if (file instanceof INodeFileUnderConstruction) {
out.writeBoolean(true);
final INodeFileUnderConstruction uc = (INodeFileUnderConstruction)file;
writeString(uc.getClientName(), out);
writeString(uc.getClientMachine(), out);
} else {
out.writeBoolean(false);
}
}
writePermissionStatus(file, out);
}
/**
* Serialize a {@link INodeDirectory}
* @param node The node to write
@ -156,14 +196,13 @@ public class FSImageSerialization {
*/
public static void writeINodeDirectory(INodeDirectory node, DataOutput out)
throws IOException {
byte[] name = node.getLocalNameBytes();
out.writeShort(name.length);
out.write(name);
writeLocalName(node, out);
out.writeShort(0); // replication
out.writeLong(node.getModificationTime());
out.writeLong(0); // access time
out.writeLong(0); // preferred block size
out.writeInt(-1); // # of blocks
out.writeLong(node.getNsQuota());
out.writeLong(node.getDsQuota());
if (node instanceof INodeDirectorySnapshottable) {
@ -172,11 +211,8 @@ public class FSImageSerialization {
out.writeBoolean(false);
out.writeBoolean(node instanceof INodeDirectoryWithSnapshot);
}
FsPermission filePerm = TL_DATA.get().FILE_PERM;
filePerm.fromShort(node.getFsPermissionShort());
PermissionStatus.write(out, node.getUserName(),
node.getGroupName(),
filePerm);
writePermissionStatus(node, out);
}
/**
@ -186,74 +222,28 @@ public class FSImageSerialization {
*/
private static void writeINodeSymlink(INodeSymlink node, DataOutput out)
throws IOException {
byte[] name = node.getLocalNameBytes();
out.writeShort(name.length);
out.write(name);
writeLocalName(node, out);
out.writeShort(0); // replication
out.writeLong(0); // modification time
out.writeLong(0); // access time
out.writeLong(0); // preferred block size
out.writeInt(-2); // # of blocks
Text.writeString(out, node.getSymlinkString());
FsPermission filePerm = TL_DATA.get().FILE_PERM;
filePerm.fromShort(node.getFsPermissionShort());
PermissionStatus.write(out, node.getUserName(),
node.getGroupName(),
filePerm);
}
/**
* Serialize a {@link INodeFile} node
* @param node The node to write
* @param out The {@link DataOutputStream} where the fields are written
* @param writeBlock Whether to write block information
*/
public static void writeINodeFile(INodeFile node, DataOutputStream out,
boolean writeBlock) throws IOException {
byte[] name = node.getLocalNameBytes();
out.writeShort(name.length);
out.write(name);
INodeFile fileINode = node;
out.writeShort(fileINode.getFileReplication());
out.writeLong(fileINode.getModificationTime());
out.writeLong(fileINode.getAccessTime());
out.writeLong(fileINode.getPreferredBlockSize());
if (writeBlock) {
Block[] blocks = fileINode.getBlocks();
out.writeInt(blocks.length);
out.writeBoolean(true);
for (Block blk : blocks)
blk.write(out);
} else {
out.writeInt(0); // # of blocks
out.writeBoolean(false);
}
// TODO: fix snapshot fsimage
if (node instanceof INodeFileWithSnapshot) {
out.writeLong(node.computeFileSize(true, null));
out.writeBoolean(false);
} else {
out.writeLong(-1);
out.writeBoolean(node instanceof FileWithSnapshot);
}
FsPermission filePerm = TL_DATA.get().FILE_PERM;
filePerm.fromShort(fileINode.getFsPermissionShort());
PermissionStatus.write(out, fileINode.getUserName(),
fileINode.getGroupName(),
filePerm);
writePermissionStatus(node, out);
}
/**
* Save one inode's attributes to the image.
*/
static void saveINode2Image(INode node, DataOutputStream out)
public static void saveINode2Image(INode node, DataOutputStream out)
throws IOException {
if (node.isDirectory()) {
writeINodeDirectory((INodeDirectory) node, out);
} else if (node.isSymlink()) {
writeINodeSymlink((INodeSymlink) node, out);
} else {
writeINodeFile((INodeFile) node, out, true);
writeINodeFile((INodeFile) node, out, false);
}
}
@ -273,7 +263,7 @@ public class FSImageSerialization {
}
@SuppressWarnings("deprecation")
static void writeString(String str, DataOutputStream out) throws IOException {
public static void writeString(String str, DataOutputStream out) throws IOException {
DeprecatedUTF8 ustr = TL_DATA.get().U_STR;
ustr.set(str);
ustr.write(out);
@ -336,7 +326,13 @@ public class FSImageSerialization {
return DFSUtil.bytes2byteArray(ustr.getBytes(),
ustr.getLength(), (byte) Path.SEPARATOR_CHAR);
}
private static void writeLocalName(INode inode, DataOutput out)
throws IOException {
final byte[] name = inode.getLocalNameBytes();
out.writeShort(name.length);
out.write(name);
}
/**
* Write an array of blocks as compactly as possible. This uses

21
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
View File

@ -179,7 +179,6 @@ import org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMBean;
import org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.SnapshotDiffInfo;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileUnderConstructionWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotManager;
@ -1988,13 +1987,11 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
LocatedBlock prepareFileForWrite(String src, INodeFile file,
String leaseHolder, String clientMachine, DatanodeDescriptor clientNode,
boolean writeToEditLog, Snapshot latestSnapshot) throws IOException {
if (latestSnapshot != null) {
file = file.recordModification(latestSnapshot);
}
file = file.recordModification(latestSnapshot);
final INodeFileUnderConstruction cons = file.toUnderConstruction(
leaseHolder, clientMachine, clientNode);
dir.replaceINodeFile(src, file, cons, latestSnapshot);
dir.replaceINodeFile(src, file, cons);
leaseManager.addLease(cons.getClientName(), src);
LocatedBlock ret = blockManager.convertLastBlockToUnderConstruction(cons);
@ -3325,22 +3322,12 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
assert hasWriteLock();
leaseManager.removeLease(pendingFile.getClientName(), src);
if (latestSnapshot != null) {
if (pendingFile.getClass() == INodeFileUnderConstruction.class) {
// Replace it with INodeFileUnderConstructionWithSnapshot.
// This replacement does not need to be recorded in snapshot.
INodeFileUnderConstructionWithSnapshot pendingFileWithSnaphsot =
new INodeFileUnderConstructionWithSnapshot(pendingFile);
dir.replaceINodeFile(src, pendingFile, pendingFileWithSnaphsot, null);
pendingFile = pendingFileWithSnaphsot;
}
pendingFile = pendingFile.recordModification(latestSnapshot);
}
pendingFile = pendingFile.recordModification(latestSnapshot);
// The file is no longer pending.
// Create permanent INode, update blocks
final INodeFile newFile = pendingFile.toINodeFile(now());
dir.replaceINodeFile(src, pendingFile, newFile, latestSnapshot);
dir.replaceINodeFile(src, pendingFile, newFile);
// close file and persist block allocations for this file
dir.closeFile(src, newFile);

88
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INode.java
View File

@ -32,10 +32,6 @@ import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.diff.Diff;
import org.apache.hadoop.util.StringUtils;
@ -153,19 +149,11 @@ public abstract class INode implements Diff.Element<byte[]> {
}
INode(long id, byte[] name, PermissionStatus permissions,
INodeDirectory parent, long modificationTime, long accessTime) {
this(id, name, PermissionStatusFormat.toLong(permissions), parent,
long modificationTime, long accessTime) {
this(id, name, PermissionStatusFormat.toLong(permissions), null,
modificationTime, accessTime);
}
INode(long id, PermissionStatus permissions, long mtime, long atime) {
this(id, null, PermissionStatusFormat.toLong(permissions), null, mtime, atime);
}
protected INode(long id, String name, PermissionStatus permissions) {
this(id, DFSUtil.string2Bytes(name), permissions, null, 0L, 0L);
}
/** @param other Other node to be copied */
INode(INode other) {
this(other.id, other.name, other.permission, other.parent,
@ -264,6 +252,14 @@ public abstract class INode implements Diff.Element<byte[]> {
return updatePermissionStatus(PermissionStatusFormat.MODE, mode, latest);
}
/** Is this inode in the latest snapshot? */
public final boolean isInLatestSnapshot(final Snapshot latest) {
return latest != null
&& (parent == null
|| (parent.isInLatestSnapshot(latest)
&& this == parent.getChild(getLocalNameBytes(), latest)));
}
/**
* This inode is being modified. The previous version of the inode needs to
* be recorded in the latest snapshot.
@ -302,7 +298,7 @@ public abstract class INode implements Diff.Element<byte[]> {
* deletion/update will be added to the given map.
* @return the number of deleted inodes in the subtree.
*/
abstract int destroySubtreeAndCollectBlocks(Snapshot snapshot,
public abstract int destroySubtreeAndCollectBlocks(Snapshot snapshot,
BlocksMapUpdateInfo collectedBlocks);
/** Compute {@link ContentSummary}. */
@ -411,7 +407,7 @@ public abstract class INode implements Diff.Element<byte[]> {
* Get parent directory
* @return parent INode
*/
public INodeDirectory getParent() {
public final INodeDirectory getParent() {
return this.parent;
}
@ -577,66 +573,6 @@ public abstract class INode implements Diff.Element<byte[]> {
return Arrays.hashCode(this.name);
}
/**
* Create an INode; the inode's name is not set yet
*
* @param id preassigned inode id
* @param permissions permissions
* @param blocks blocks if a file
* @param symlink symblic link if a symbolic link
* @param replication replication factor
* @param modificationTime modification time
* @param atime access time
* @param nsQuota namespace quota
* @param dsQuota disk quota
* @param preferredBlockSize block size
* @param numBlocks number of blocks
* @param computeFileSize non-negative computeFileSize means the node is
* INodeFileSnapshot
* @param snapshottable whether the node is {@link INodeDirectorySnapshottable}
* @param withSnapshot whether the node has snapshots
* @param underConstruction whether the node is
* {@link INodeFileUnderConstructionSnapshot}
* @param clientName clientName of {@link INodeFileUnderConstructionSnapshot}
* @param clientMachine clientMachine of
* {@link INodeFileUnderConstructionSnapshot}
* @return an inode
*/
static INode newINode(long id, PermissionStatus permissions,
BlockInfo[] blocks, String symlink, short replication,
long modificationTime, long atime, long nsQuota, long dsQuota,
long preferredBlockSize, int numBlocks,
long computeFileSize, boolean snapshottable, boolean withSnapshot,
boolean underConstruction, String clientName, String clientMachine) {
if (symlink.length() != 0) { // check if symbolic link
return new INodeSymlink(id, symlink, modificationTime, atime, permissions);
} else if (blocks == null && numBlocks < 0) {
//not sym link and numBlocks < 0? directory!
INodeDirectory dir = null;
if (nsQuota >= 0 || dsQuota >= 0) {
dir = new INodeDirectoryWithQuota(id, permissions, modificationTime,
nsQuota, dsQuota);
} else {
// regular directory
dir = new INodeDirectory(id, permissions, modificationTime);
}
return snapshottable ? new INodeDirectorySnapshottable(dir)
: (withSnapshot ? new INodeDirectoryWithSnapshot(dir)
: dir);
}
// file
INodeFile fileNode = new INodeFile(id, permissions, blocks, replication,
modificationTime, atime, preferredBlockSize);
// TODO: fix image for file diff.
// if (computeFileSize >= 0) {
// return underConstruction ? new INodeFileUnderConstructionSnapshot(
// fileNode, computeFileSize, clientName, clientMachine)
// : new INodeFileWithSnapshot(fileNode, computeFileSize);
// } else {
return withSnapshot ? new INodeFileWithSnapshot(fileNode) : fileNode;
// }
}
/**
* Dump the subtree starting from this inode.
* @return a text representation of the tree.

62
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeDirectory.java
View File

@ -59,21 +59,14 @@ public class INodeDirectory extends INode {
}
protected static final int DEFAULT_FILES_PER_DIRECTORY = 5;
final static String ROOT_NAME = "";
final static byte[] ROOT_NAME = DFSUtil.string2Bytes("");
private List<INode> children = null;
public INodeDirectory(long id, String name, PermissionStatus permissions) {
super(id, name, permissions);
}
public INodeDirectory(long id, PermissionStatus permissions, long mTime) {
super(id, permissions, mTime, 0);
}
/** constructor */
INodeDirectory(long id, byte[] name, PermissionStatus permissions, long mtime) {
super(id, name, permissions, null, mtime, 0L);
public INodeDirectory(long id, byte[] name, PermissionStatus permissions,
long mtime) {
super(id, name, permissions, mtime, 0L);
}
/**
@ -124,12 +117,6 @@ public class INodeDirectory extends INode {
return i;
}
INode removeChild(INode node) {
assertChildrenNonNull();
final int i = searchChildren(node.getLocalNameBytes());
return i >= 0? children.remove(i): null;
}
/**
* Remove the specified child from this directory.
*
@ -140,8 +127,9 @@ public class INodeDirectory extends INode {
public INode removeChild(INode child, Snapshot latest) {
assertChildrenNonNull();
if (latest != null) {
return recordModification(latest).removeChild(child, latest);
if (isInLatestSnapshot(latest)) {
return replaceSelf4INodeDirectoryWithSnapshot()
.removeChild(child, latest);
}
final int i = searchChildren(child.getLocalNameBytes());
@ -196,15 +184,16 @@ public class INodeDirectory extends INode {
private final <N extends INodeDirectory> N replaceSelf(final N newDir) {
final INodeDirectory parent = getParent();
Preconditions.checkArgument(parent != null, "parent is null, this=%s", this);
return parent.replaceChild(newDir);
parent.replaceChild(this, newDir);
return newDir;
}
final <N extends INode> N replaceChild(final N newChild) {
public void replaceChild(final INode oldChild, final INode newChild) {
assertChildrenNonNull();
final int i = searchChildrenForExistingINode(newChild);
final INode oldChild = children.set(i, newChild);
final INode removed = children.set(i, newChild);
Preconditions.checkState(removed == oldChild);
oldChild.clearReferences();
return newChild;
}
/** Replace a child {@link INodeFile} with an {@link INodeFileWithSnapshot}. */
@ -212,7 +201,9 @@ public class INodeDirectory extends INode {
final INodeFile child) {
Preconditions.checkArgument(!(child instanceof INodeFileWithSnapshot),
"Child file is already an INodeFileWithSnapshot, child=" + child);
return replaceChild(new INodeFileWithSnapshot(child));
final INodeFileWithSnapshot newChild = new INodeFileWithSnapshot(child);
replaceChild(child, newChild);
return newChild;
}
/** Replace a child {@link INodeFile} with an {@link INodeFileUnderConstructionWithSnapshot}. */
@ -220,13 +211,17 @@ public class INodeDirectory extends INode {
final INodeFileUnderConstruction child) {
Preconditions.checkArgument(!(child instanceof INodeFileUnderConstructionWithSnapshot),
"Child file is already an INodeFileUnderConstructionWithSnapshot, child=" + child);
return replaceChild(new INodeFileUnderConstructionWithSnapshot(child));
final INodeFileUnderConstructionWithSnapshot newChild
= new INodeFileUnderConstructionWithSnapshot(child, null);
replaceChild(child, newChild);
return newChild;
}
@Override
public INodeDirectory recordModification(Snapshot latest) {
return latest == null? this
: replaceSelf4INodeDirectoryWithSnapshot().recordModification(latest);
return isInLatestSnapshot(latest)?
replaceSelf4INodeDirectoryWithSnapshot().recordModification(latest)
: this;
}
/**
@ -463,10 +458,11 @@ public class INodeDirectory extends INode {
* @return false if the child with this name already exists;
* otherwise, return true;
*/
public boolean addChild(final INode node, final boolean setModTime,
public boolean addChild(INode node, final boolean setModTime,
final Snapshot latest) {
if (latest != null) {
return recordModification(latest).addChild(node, setModTime, latest);
if (isInLatestSnapshot(latest)) {
return replaceSelf4INodeDirectoryWithSnapshot()
.addChild(node, setModTime, latest);
}
if (children == null) {
@ -483,7 +479,7 @@ public class INodeDirectory extends INode {
updateModificationTime(node.getModificationTime(), latest);
}
if (node.getGroupName() == null) {
node.setGroup(getGroupName(), latest);
node.setGroup(getGroupName(), null);
}
return true;
}
@ -741,6 +737,10 @@ public class INodeDirectory extends INode {
inodes[i] = inode;
}
void setLastINode(INode last) {
inodes[inodes.length - 1] = last;
}
/**
* @return The number of non-null elements
*/

15
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeDirectoryWithQuota.java
View File

@ -55,16 +55,16 @@ public class INodeDirectoryWithQuota extends INodeDirectory {
}
/** constructor with no quota verification */
INodeDirectoryWithQuota(long id, PermissionStatus permissions,
INodeDirectoryWithQuota(long id, byte[] name, PermissionStatus permissions,
long modificationTime, long nsQuota, long dsQuota) {
super(id, permissions, modificationTime);
super(id, name, permissions, modificationTime);
this.nsQuota = nsQuota;
this.dsQuota = dsQuota;
}
/** constructor with no quota verification */
INodeDirectoryWithQuota(long id, String name, PermissionStatus permissions) {
super(id, name, permissions);
INodeDirectoryWithQuota(long id, byte[] name, PermissionStatus permissions) {
super(id, name, permissions, 0L);
}
/** Get this directory's namespace quota
@ -89,9 +89,10 @@ public class INodeDirectoryWithQuota extends INodeDirectory {
* @param dsQuota diskspace quota to be set
*/
public void setQuota(long nsQuota, long dsQuota, Snapshot latest) {
recordModification(latest);
this.nsQuota = nsQuota;
this.dsQuota = dsQuota;
final INodeDirectoryWithQuota nodeToUpdate
= (INodeDirectoryWithQuota)recordModification(latest);
nodeToUpdate.nsQuota = nsQuota;
nodeToUpdate.dsQuota = dsQuota;
}

38
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFile.java
View File

@ -52,15 +52,6 @@ public class INodeFile extends INode implements BlockCollection {
static final FsPermission UMASK = FsPermission.createImmutable((short)0111);
/**
* Check the first block to see if two INodes are about the same file
*/
public static boolean isOfSameFile(INodeFile file1, INodeFile file2) {
BlockInfo[] blk1 = file1.getBlocks();
BlockInfo[] blk2 = file2.getBlocks();
return blk1 != null && blk2 != null && blk1[0] == blk2[0];
}
/** Format: [16 bits for replication][48 bits for PreferredBlockSize] */
private static class HeaderFormat {
/** Number of bits for Block size */
@ -100,16 +91,9 @@ public class INodeFile extends INode implements BlockCollection {
private BlockInfo[] blocks;
INodeFile(long id, PermissionStatus permissions, BlockInfo[] blklist,
short replication, long modificationTime,
long atime, long preferredBlockSize) {
this(id, null, permissions, modificationTime, atime, blklist, replication,
preferredBlockSize);
}
INodeFile(long id, byte[] name, PermissionStatus permissions, long mtime, long atime,
BlockInfo[] blklist, short replication, long preferredBlockSize) {
super(id, name, permissions, null, mtime, atime);
super(id, name, permissions, mtime, atime);
header = HeaderFormat.combineReplication(header, replication);
header = HeaderFormat.combinePreferredBlockSize(header, preferredBlockSize);
this.blocks = blklist;
@ -140,9 +124,10 @@ public class INodeFile extends INode implements BlockCollection {
@Override
public INodeFile recordModification(final Snapshot latest) {
return latest == null? this
: parent.replaceChild4INodeFileWithSnapshot(this)
.recordModification(latest);
return isInLatestSnapshot(latest)?
parent.replaceChild4INodeFileWithSnapshot(this)
.recordModification(latest)
: this;
}
/**
@ -171,8 +156,9 @@ public class INodeFile extends INode implements BlockCollection {
}
public void setFileReplication(short replication, Snapshot latest) {
if (latest != null) {
recordModification(latest).setFileReplication(replication, null);
final INodeFile nodeToUpdate = recordModification(latest);
if (nodeToUpdate != this) {
nodeToUpdate.setFileReplication(replication, null);
return;
}
header = HeaderFormat.combineReplication(header, replication);
@ -239,9 +225,14 @@ public class INodeFile extends INode implements BlockCollection {
public int destroySubtreeAndCollectBlocks(final Snapshot snapshot,
final BlocksMapUpdateInfo collectedBlocks) {
if (snapshot != null) {
// never delete blocks for snapshot since the current file still exists
return 0;
}
return destroySelfAndCollectBlocks(collectedBlocks);
}
public int destroySelfAndCollectBlocks(BlocksMapUpdateInfo collectedBlocks) {
if (blocks != null && collectedBlocks != null) {
for (BlockInfo blk : blocks) {
collectedBlocks.addDeleteBlock(blk);
@ -351,7 +342,8 @@ public class INodeFile extends INode implements BlockCollection {
super.dumpTreeRecursively(out, prefix, snapshot);
out.print(", fileSize=" + computeFileSize(true, snapshot));
// only compare the first block
out.print(", blocks=" + (blocks == null? null: blocks[0]));
out.print(", blocks=");
out.print(blocks == null || blocks.length == 0? null: blocks[0]);
out.println();
}
}

7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFileUnderConstruction.java
View File

@ -132,9 +132,10 @@ public class INodeFileUnderConstruction extends INodeFile implements MutableBloc
@Override
public INodeFileUnderConstruction recordModification(final Snapshot latest) {
return latest == null? this
: parent.replaceChild4INodeFileUcWithSnapshot(this)
.recordModification(latest);
return isInLatestSnapshot(latest)?
parent.replaceChild4INodeFileUcWithSnapshot(this)
.recordModification(latest)
: this;
}
/** Assert all blocks are complete. */

19
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeSymlink.java
View File

@ -31,23 +31,22 @@ import org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot;
public class INodeSymlink extends INode {
private final byte[] symlink; // The target URI
INodeSymlink(long id, String value, long mtime, long atime,
PermissionStatus permissions) {
super(id, permissions, mtime, atime);
this.symlink = DFSUtil.string2Bytes(value);
INodeSymlink(long id, byte[] name, PermissionStatus permissions,
long mtime, long atime, String symlink) {
super(id, name, permissions, mtime, atime);
this.symlink = DFSUtil.string2Bytes(symlink);
}
INodeSymlink(INodeSymlink that) {
super(that);
//copy symlink
this.symlink = new byte[that.symlink.length];
System.arraycopy(that.symlink, 0, this.symlink, 0, that.symlink.length);
this.symlink = that.symlink;
}
@Override
INode recordModification(Snapshot latest) {
return parent.saveChild2Snapshot(this, latest, new INodeSymlink(this));
return isInLatestSnapshot(latest)?
parent.saveChild2Snapshot(this, latest, new INodeSymlink(this))
: this;
}
/** @return true unconditionally. */
@ -71,7 +70,7 @@ public class INodeSymlink extends INode {
}
@Override
int destroySubtreeAndCollectBlocks(final Snapshot snapshot,
public int destroySubtreeAndCollectBlocks(final Snapshot snapshot,
final BlocksMapUpdateInfo collectedBlocks) {
return 1;
}

31
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/AbstractINodeDiff.java
View File

@ -17,6 +17,10 @@
*/
package org.apache.hadoop.hdfs.server.namenode.snapshot;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.hadoop.hdfs.server.namenode.FSImageSerialization;
import org.apache.hadoop.hdfs.server.namenode.INode;
import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo;
@ -43,6 +47,16 @@ import com.google.common.base.Preconditions;
abstract class AbstractINodeDiff<N extends INode,
D extends AbstractINodeDiff<N, D>>
implements Comparable<Snapshot> {
/** A factory for creating diff and snapshot copy of an inode. */
static abstract class Factory<N extends INode,
D extends AbstractINodeDiff<N, D>> {
/** @return an {@link AbstractINodeDiff}. */
abstract D createDiff(Snapshot snapshot, N currentINode);
/** @return a snapshot copy of the current inode. */
abstract N createSnapshotCopy(N currentINode);
}
/** The snapshot will be obtained after this diff is applied. */
final Snapshot snapshot;
/** The snapshot inode data. It is null when there is no change. */
@ -84,19 +98,16 @@ abstract class AbstractINodeDiff<N extends INode,
posteriorDiff = posterior;
}
/** Copy the INode state to the snapshot if it is not done already. */
void checkAndInitINode(N currentINode, N snapshotCopy) {
/** Save the INode state to the snapshot if it is not done already. */
void saveSnapshotCopy(N snapshotCopy, Factory<N, D> factory, N currentINode) {
if (snapshotINode == null) {
if (snapshotCopy == null) {
snapshotCopy = createSnapshotCopyOfCurrentINode(currentINode);
snapshotCopy = factory.createSnapshotCopy(currentINode);
}
snapshotINode = snapshotCopy;
}
}
/** @return a snapshot copy of the current inode. */
abstract N createSnapshotCopyOfCurrentINode(N currentINode);
/** @return the inode corresponding to the snapshot. */
N getSnapshotINode() {
// get from this diff, then the posterior diff
@ -119,4 +130,12 @@ abstract class AbstractINodeDiff<N extends INode,
return getClass().getSimpleName() + ": " + snapshot + " (post="
+ (posteriorDiff == null? null: posteriorDiff.snapshot) + ")";
}
void writeSnapshotPath(DataOutputStream out) throws IOException {
// Assume the snapshot is recorded before.
// The root path is sufficient for looking up the Snapshot object.
FSImageSerialization.writeString(snapshot.getRoot().getFullPathName(), out);
}
abstract void write(DataOutputStream out) throws IOException;
}

36
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/AbstractINodeDiffList.java
View File

@ -34,13 +34,13 @@ import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo;
abstract class AbstractINodeDiffList<N extends INode,
D extends AbstractINodeDiff<N, D>>
implements Iterable<D> {
private AbstractINodeDiff.Factory<N, D> factory;
/** Diff list sorted by snapshot IDs, i.e. in chronological order. */
private final List<D> diffs = new ArrayList<D>();
AbstractINodeDiffList(final List<D> diffs) {
if (diffs != null) {
this.diffs.addAll(diffs);
}
void setFactory(AbstractINodeDiff.Factory<N, D> factory) {
this.factory = factory;
}
/** @return this list as a unmodifiable {@link List}. */
@ -48,12 +48,6 @@ abstract class AbstractINodeDiffList<N extends INode,
return Collections.unmodifiableList(diffs);
}
/** @return the current inode. */
abstract N getCurrentINode();
/** Add a {@link AbstractINodeDiff} for the given snapshot and inode. */
abstract D addSnapshotDiff(Snapshot snapshot);
/**
* Delete the snapshot with the given name. The synchronization of the diff
* list will be done outside.
@ -66,7 +60,7 @@ abstract class AbstractINodeDiffList<N extends INode,
* @return The SnapshotDiff containing the deleted snapshot.
* Null if the snapshot with the given name does not exist.
*/
final D deleteSnapshotDiff(final Snapshot snapshot,
final D deleteSnapshotDiff(final Snapshot snapshot, final N currentINode,
final BlocksMapUpdateInfo collectedBlocks) {
int snapshotIndex = Collections.binarySearch(diffs, snapshot);
if (snapshotIndex < 0) {
@ -85,7 +79,8 @@ abstract class AbstractINodeDiffList<N extends INode,
} else if (removed.snapshotINode != null) {
removed.snapshotINode.clearReferences();
}
previous.combinePosteriorAndCollectBlocks(getCurrentINode(), removed, collectedBlocks);
previous.combinePosteriorAndCollectBlocks(currentINode, removed,
collectedBlocks);
previous.setPosterior(removed.getPosterior());
}
removed.setPosterior(null);
@ -93,8 +88,13 @@ abstract class AbstractINodeDiffList<N extends INode,
}
}
/** Add an {@link AbstractINodeDiff} for the given snapshot. */
final D addDiff(Snapshot latest, N currentINode) {
return addLast(factory.createDiff(latest, currentINode));
}
/** Append the diff at the end of the list. */
final D addLast(D diff) {
private final D addLast(D diff) {
final D last = getLast();
diffs.add(diff);
if (last != null) {
@ -154,17 +154,17 @@ abstract class AbstractINodeDiffList<N extends INode,
* Check if the latest snapshot diff exists. If not, add it.
* @return the latest snapshot diff, which is never null.
*/
final D checkAndAddLatestSnapshotDiff(Snapshot latest) {
final D checkAndAddLatestSnapshotDiff(Snapshot latest, N currentINode) {
final D last = getLast();
return last != null && last.snapshot.equals(latest)? last
: addSnapshotDiff(latest);
: addDiff(latest, currentINode);
}
/** Save the snapshot copy to the latest snapshot. */
void saveSelf2Snapshot(Snapshot latest, N snapshotCopy) {
void saveSelf2Snapshot(Snapshot latest, N currentINode, N snapshotCopy) {
if (latest != null) {
checkAndAddLatestSnapshotDiff(latest).checkAndInitINode(
getCurrentINode(), snapshotCopy);
checkAndAddLatestSnapshotDiff(latest, currentINode).saveSnapshotCopy(
snapshotCopy, factory, currentINode);
}
}

83
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/FileWithSnapshot.java
View File

@ -17,10 +17,12 @@
*/
package org.apache.hadoop.hdfs.server.namenode.snapshot;
import java.util.List;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.namenode.FSImageSerialization;
import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
@ -43,11 +45,11 @@ public interface FileWithSnapshot {
fileSize = file.computeFileSize(true, null);
}
@Override
INodeFile createSnapshotCopyOfCurrentINode(INodeFile currentINode) {
final INodeFile copy = new INodeFile(currentINode);
copy.setBlocks(null);
return copy;
/** Constructor used by FSImage loading */
FileDiff(Snapshot snapshot, INodeFile snapshotINode,
FileDiff posteriorDiff, long fileSize) {
super(snapshot, snapshotINode, posteriorDiff);
this.fileSize = fileSize;
}
@Override
@ -61,35 +63,51 @@ public interface FileWithSnapshot {
return super.toString() + " fileSize=" + fileSize + ", rep="
+ (snapshotINode == null? "?": snapshotINode.getFileReplication());
}
/** Serialize fields to out */
void write(DataOutputStream out) throws IOException {
writeSnapshotPath(out);
out.writeLong(fileSize);
// write snapshotINode
if (snapshotINode != null) {
out.writeBoolean(true);
FSImageSerialization.writeINodeFile(snapshotINode, out, true);
} else {
out.writeBoolean(false);
}
}
}
static class FileDiffFactory
extends AbstractINodeDiff.Factory<INodeFile, FileDiff> {
static final FileDiffFactory INSTANCE = new FileDiffFactory();
@Override
FileDiff createDiff(Snapshot snapshot, INodeFile file) {
return new FileDiff(snapshot, file);
}
@Override
INodeFile createSnapshotCopy(INodeFile currentINode) {
final INodeFile copy = new INodeFile(currentINode);
copy.setBlocks(null);
return copy;
}
}
/**
* A list of {@link FileDiff}.
*/
static class FileDiffList extends AbstractINodeDiffList<INodeFile, FileDiff> {
final INodeFile currentINode;
FileDiffList(INodeFile currentINode, List<FileDiff> diffs) {
super(diffs);
this.currentINode = currentINode;
}
@Override
INodeFile getCurrentINode() {
return currentINode;
}
@Override
FileDiff addSnapshotDiff(Snapshot snapshot) {
return addLast(new FileDiff(snapshot, getCurrentINode()));
}
public static class FileDiffList
extends AbstractINodeDiffList<INodeFile, FileDiff> {
}
/** @return the {@link INodeFile} view of this object. */
public INodeFile asINodeFile();
/** @return the file diff list. */
public FileDiffList getFileDiffList();
public FileDiffList getDiffs();
/** Is the current file deleted? */
public boolean isCurrentFileDeleted();
@ -103,7 +121,7 @@ public interface FileWithSnapshot {
static short getBlockReplication(final FileWithSnapshot file) {
short max = file.isCurrentFileDeleted()? 0
: file.asINodeFile().getFileReplication();
for(FileDiff d : file.getFileDiffList().asList()) {
for(FileDiff d : file.getDiffs().asList()) {
if (d.snapshotINode != null) {
final short replication = d.snapshotINode.getFileReplication();
if (replication > max) {
@ -120,22 +138,23 @@ public interface FileWithSnapshot {
*/
static void collectBlocksAndClear(final FileWithSnapshot file,
final BlocksMapUpdateInfo info) {
// check if everything is deleted.
if (file.isCurrentFileDeleted()
&& file.getDiffs().asList().isEmpty()) {
file.asINodeFile().destroySelfAndCollectBlocks(info);
return;
}
// find max file size.
final long max;
if (file.isCurrentFileDeleted()) {
final FileDiff last = file.getFileDiffList().getLast();
final FileDiff last = file.getDiffs().getLast();
max = last == null? 0: last.fileSize;
} else {
max = file.asINodeFile().computeFileSize(true, null);
}
collectBlocksBeyondMax(file, max, info);
// if everything is deleted, set blocks to null.
if (file.isCurrentFileDeleted()
&& file.getFileDiffList().asList().isEmpty()) {
file.asINodeFile().setBlocks(null);
}
}
private static void collectBlocksBeyondMax(final FileWithSnapshot file,

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/INodeDirectorySnapshottable.java
View File

@ -264,7 +264,7 @@ public class INodeDirectorySnapshottable extends INodeDirectoryWithSnapshot {
+ "snapshot with the same name \"" + name + "\".");
}
final DirectoryDiff d = getDiffs().addSnapshotDiff(s);
final DirectoryDiff d = getDiffs().addDiff(s, this);
d.snapshotINode = s.getRoot();
snapshotsByNames.add(-i - 1, s);

144
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/INodeDirectoryWithSnapshot.java
View File

@ -27,14 +27,12 @@ import java.util.Map;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.protocol.SnapshotDiffReport.DiffReportEntry;
import org.apache.hadoop.hdfs.protocol.SnapshotDiffReport.DiffType;
import org.apache.hadoop.hdfs.server.namenode.FSImageSerialization;
import org.apache.hadoop.hdfs.server.namenode.INode;
import org.apache.hadoop.hdfs.server.namenode.INodeDirectory;
import org.apache.hadoop.hdfs.server.namenode.INodeDirectoryWithQuota;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
import org.apache.hadoop.hdfs.server.namenode.snapshot.diff.Diff;
import org.apache.hadoop.hdfs.server.namenode.snapshot.diff.Diff.Container;
import org.apache.hadoop.hdfs.server.namenode.snapshot.diff.Diff.UndoInfo;
@ -59,6 +57,10 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
super(created, deleted);
}
private final INode setCreatedChild(final int c, final INode newChild) {
return getCreatedList().set(c, newChild);
}
/** Serialize {@link #created} */
private void writeCreated(DataOutputStream out) throws IOException {
final List<INode> created = getCreatedList();
@ -76,30 +78,7 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
final List<INode> deleted = getDeletedList();
out.writeInt(deleted.size());
for (INode node : deleted) {
if (node.isDirectory()) {
FSImageSerialization.writeINodeDirectory((INodeDirectory) node, out);
} else { // INodeFile
final List<INode> created = getCreatedList();
// we write the block information only for INodeFile node when the
// node is only stored in the deleted list or the node is not a
// snapshot copy
int createdIndex = search(created, node.getKey());
if (createdIndex < 0) {
FSImageSerialization.writeINodeFile((INodeFile) node, out, true);
} else {
INodeFile cNode = (INodeFile) created.get(createdIndex);
INodeFile dNode = (INodeFile) node;
// A corner case here: after deleting a Snapshot, when combining
// SnapshotDiff, we may put two inodes sharing the same name but
// with totally different blocks in the created and deleted list of
// the same SnapshotDiff.
if (INodeFile.isOfSameFile(cNode, dNode)) {
FSImageSerialization.writeINodeFile(dNode, out, false);
} else {
FSImageSerialization.writeINodeFile(dNode, out, true);
}
}
}
FSImageSerialization.saveINode2Image(node, out);
}
}
@ -108,7 +87,7 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
writeCreated(out);
writeDeleted(out);
}
/** @return The list of INodeDirectory contained in the deleted list */
private List<INodeDirectory> getDirsInDeleted() {
List<INodeDirectory> dirList = new ArrayList<INodeDirectory>();
@ -205,16 +184,6 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
return snapshotINode == snapshot.getRoot();
}
@Override
INodeDirectory createSnapshotCopyOfCurrentINode(INodeDirectory currentDir) {
final INodeDirectory copy = currentDir instanceof INodeDirectoryWithQuota?
new INodeDirectoryWithQuota(currentDir, false,
currentDir.getNsQuota(), currentDir.getDsQuota())
: new INodeDirectory(currentDir, false);
copy.setChildren(null);
return copy;
}
@Override
void combinePosteriorAndCollectBlocks(final INodeDirectory currentDir,
final DirectoryDiff posterior, final BlocksMapUpdateInfo collectedBlocks) {
@ -222,8 +191,8 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
/** Collect blocks for deleted files. */
@Override
public void process(INode inode) {
if (inode != null && inode instanceof INodeFile) {
((INodeFile)inode).destroySubtreeAndCollectBlocks(null,
if (inode != null) {
inode.destroySubtreeAndCollectBlocks(posterior.snapshot,
collectedBlocks);
}
}
@ -295,16 +264,11 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
return super.toString() + " childrenSize=" + childrenSize + ", " + diff;
}
/** Serialize fields to out */
@Override
void write(DataOutputStream out) throws IOException {
writeSnapshotPath(out);
out.writeInt(childrenSize);
// No need to write all fields of Snapshot here, since the snapshot must
// have been recorded before when writing the FSImage. We only need to
// record the full path of its root.
byte[] fullPath = DFSUtil.string2Bytes(snapshot.getRoot()
.getFullPathName());
out.writeShort(fullPath.length);
out.write(fullPath);
// write snapshotINode
if (isSnapshotRoot()) {
out.writeBoolean(true);
@ -322,21 +286,31 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
}
}
static class DirectoryDiffFactory
extends AbstractINodeDiff.Factory<INodeDirectory, DirectoryDiff> {
static final DirectoryDiffFactory INSTANCE = new DirectoryDiffFactory();
@Override
DirectoryDiff createDiff(Snapshot snapshot, INodeDirectory currentDir) {
return new DirectoryDiff(snapshot, currentDir);
}
@Override
INodeDirectory createSnapshotCopy(INodeDirectory currentDir) {
final INodeDirectory copy = currentDir instanceof INodeDirectoryWithQuota?
new INodeDirectoryWithQuota(currentDir, false,
currentDir.getNsQuota(), currentDir.getDsQuota())
: new INodeDirectory(currentDir, false);
copy.setChildren(null);
return copy;
}
}
/** A list of directory diffs. */
class DirectoryDiffList extends
AbstractINodeDiffList<INodeDirectory, DirectoryDiff> {
DirectoryDiffList(List<DirectoryDiff> diffs) {
super(diffs);
}
@Override
INodeDirectoryWithSnapshot getCurrentINode() {
return INodeDirectoryWithSnapshot.this;
}
@Override
DirectoryDiff addSnapshotDiff(Snapshot snapshot) {
return addLast(new DirectoryDiff(snapshot, getCurrentINode()));
static class DirectoryDiffList
extends AbstractINodeDiffList<INodeDirectory, DirectoryDiff> {
DirectoryDiffList() {
setFactory(DirectoryDiffFactory.INSTANCE);
}
}
@ -425,7 +399,7 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
INodeDirectoryWithSnapshot(INodeDirectory that, boolean adopt,
DirectoryDiffList diffs) {
super(that, adopt, that.getNsQuota(), that.getDsQuota());
this.diffs = new DirectoryDiffList(diffs == null? null: diffs.asList());
this.diffs = diffs != null? diffs: new DirectoryDiffList();
}
/** @return the last snapshot. */
@ -439,14 +413,15 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
}
@Override
public INodeDirectoryWithSnapshot recordModification(Snapshot latest) {
return saveSelf2Snapshot(latest, null);
public INodeDirectoryWithSnapshot recordModification(final Snapshot latest) {
return isInLatestSnapshot(latest)?
saveSelf2Snapshot(latest, null): this;
}
/** Save the snapshot copy to the latest snapshot. */
public INodeDirectoryWithSnapshot saveSelf2Snapshot(
final Snapshot latest, final INodeDirectory snapshotCopy) {
diffs.saveSelf2Snapshot(latest, snapshotCopy);
diffs.saveSelf2Snapshot(latest, this, snapshotCopy);
return this;
}
@ -459,7 +434,7 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
return child;
}
final DirectoryDiff diff = diffs.checkAndAddLatestSnapshotDiff(latest);
final DirectoryDiff diff = diffs.checkAndAddLatestSnapshotDiff(latest, this);
if (diff.getChild(child.getLocalNameBytes(), false, this) != null) {
// it was already saved in the latest snapshot earlier.
return child;
@ -474,7 +449,7 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
ChildrenDiff diff = null;
Integer undoInfo = null;
if (latest != null) {
diff = diffs.checkAndAddLatestSnapshotDiff(latest).diff;
diff = diffs.checkAndAddLatestSnapshotDiff(latest, this).diff;
undoInfo = diff.create(inode);
}
final boolean added = super.addChild(inode, setModTime, null);
@ -489,7 +464,7 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
ChildrenDiff diff = null;
UndoInfo<INode> undoInfo = null;
if (latest != null) {
diff = diffs.checkAndAddLatestSnapshotDiff(latest).diff;
diff = diffs.checkAndAddLatestSnapshotDiff(latest, this).diff;
undoInfo = diff.delete(child);
}
final INode removed = super.removeChild(child, null);
@ -502,6 +477,24 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
return removed;
}
@Override
public void replaceChild(final INode oldChild, final INode newChild) {
super.replaceChild(oldChild, newChild);
// replace the created child, if there is any.
final byte[] name = oldChild.getLocalNameBytes();
final List<DirectoryDiff> diffList = diffs.asList();
for(int i = diffList.size() - 1; i >= 0; i--) {
final ChildrenDiff diff = diffList.get(i).diff;
final int c = diff.searchCreatedIndex(name);
if (c >= 0) {
final INode removed = diff.setCreatedChild(c, newChild);
Preconditions.checkState(removed == oldChild);
return;
}
}
}
@Override
public ReadOnlyList<INode> getChildrenList(Snapshot snapshot) {
final DirectoryDiff diff = diffs.getDiff(snapshot);
@ -551,12 +544,12 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
}
/**
* Get all the INodeDirectory stored in the deletes lists.
* Get all the directories that are stored in some snapshot but not in the
* current children list. These directories are equivalent to the directories
* stored in the deletes lists.
*
* @param snapshotDirMap
* A HashMap storing all the INodeDirectory stored in the deleted
* lists, with their associated full Snapshot.
* @return The number of INodeDirectory returned.
* @param snapshotDirMap A snapshot-to-directory-list map for returning.
* @return The number of directories returned.
*/
public int getSnapshotDirectory(
Map<Snapshot, List<INodeDirectory>> snapshotDirMap) {
@ -574,11 +567,10 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
@Override
public int destroySubtreeAndCollectBlocks(final Snapshot snapshot,
final BlocksMapUpdateInfo collectedBlocks) {
int n = destroySubtreeAndCollectBlocksRecursively(
snapshot, collectedBlocks);
int n = destroySubtreeAndCollectBlocksRecursively(snapshot, collectedBlocks);
if (snapshot != null) {
final DirectoryDiff removed = getDiffs().deleteSnapshotDiff(snapshot,
collectedBlocks);
this, collectedBlocks);
if (removed != null) {
n++; //count this dir only if a snapshot diff is removed.
}

57
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/INodeFileUnderConstructionWithSnapshot.java
View File

@ -17,8 +17,6 @@
*/
package org.apache.hadoop.hdfs.server.namenode.snapshot;
import java.util.List;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
@ -34,15 +32,13 @@ import org.apache.hadoop.hdfs.server.namenode.INodeFileUnderConstruction;
public class INodeFileUnderConstructionWithSnapshot
extends INodeFileUnderConstruction implements FileWithSnapshot {
/**
* The difference of an {@link INodeFileUnderConstruction} between two snapshots.
* Factory for {@link INodeFileUnderConstruction} diff.
*/
static class FileUcDiff extends FileDiff {
private FileUcDiff(Snapshot snapshot, INodeFile file) {
super(snapshot, file);
}
static class FileUcDiffFactory extends FileDiffFactory {
static final FileUcDiffFactory INSTANCE = new FileUcDiffFactory();
@Override
INodeFileUnderConstruction createSnapshotCopyOfCurrentINode(INodeFile file) {
INodeFileUnderConstruction createSnapshotCopy(INodeFile file) {
final INodeFileUnderConstruction uc = (INodeFileUnderConstruction)file;
final INodeFileUnderConstruction copy = new INodeFileUnderConstruction(
uc, uc.getClientName(), uc.getClientMachine(), uc.getClientNode());
@ -51,29 +47,17 @@ public class INodeFileUnderConstructionWithSnapshot
}
}
/**
* A list of file diffs.
*/
static class FileUcDiffList extends FileDiffList {
private FileUcDiffList(INodeFile currentINode, final List<FileDiff> diffs) {
super(currentINode, diffs);
}
@Override
FileDiff addSnapshotDiff(Snapshot snapshot) {
return addLast(new FileUcDiff(snapshot, getCurrentINode()));
}
}
private final FileUcDiffList diffs;
private final FileDiffList diffs;
private boolean isCurrentFileDeleted = false;
INodeFileUnderConstructionWithSnapshot(final INodeFile f,
final String clientName,
final String clientMachine,
final DatanodeDescriptor clientNode) {
final DatanodeDescriptor clientNode,
final FileDiffList diffs) {
super(f, clientName, clientMachine, clientNode);
this.diffs = new FileUcDiffList(this, f instanceof FileWithSnapshot?
((FileWithSnapshot)f).getFileDiffList().asList(): null);
this.diffs = diffs != null? diffs: new FileDiffList();
this.diffs.setFactory(FileUcDiffFactory.INSTANCE);
}
/**
@ -82,15 +66,16 @@ public class INodeFileUnderConstructionWithSnapshot
*
* @param f The given {@link INodeFileUnderConstruction} instance
*/
public INodeFileUnderConstructionWithSnapshot(INodeFileUnderConstruction f) {
this(f, f.getClientName(), f.getClientMachine(), f.getClientNode());
public INodeFileUnderConstructionWithSnapshot(INodeFileUnderConstruction f,
final FileDiffList diffs) {
this(f, f.getClientName(), f.getClientMachine(), f.getClientNode(), diffs);
}
@Override
protected INodeFileWithSnapshot toINodeFile(final long mtime) {
assertAllBlocksComplete();
final long atime = getModificationTime();
final INodeFileWithSnapshot f = new INodeFileWithSnapshot(this);
final INodeFileWithSnapshot f = new INodeFileWithSnapshot(this, getDiffs());
f.setModificationTime(mtime, null);
f.setAccessTime(atime, null);
return f;
@ -98,16 +83,14 @@ public class INodeFileUnderConstructionWithSnapshot
@Override
public boolean isCurrentFileDeleted() {
return getParent() == null;
return isCurrentFileDeleted;
}
@Override
public INodeFileUnderConstructionWithSnapshot recordModification(
final Snapshot latest) {
// if this object is NOT the latest snapshot copy, this object is created
// after the latest snapshot, then do NOT record modification.
if (this == getParent().getChild(getLocalNameBytes(), latest)) {
diffs.saveSelf2Snapshot(latest, null);
if (isInLatestSnapshot(latest)) {
diffs.saveSelf2Snapshot(latest, this, null);
}
return this;
}
@ -118,7 +101,7 @@ public class INodeFileUnderConstructionWithSnapshot
}
@Override
public FileDiffList getFileDiffList() {
public FileDiffList getDiffs() {
return diffs;
}
@ -146,9 +129,9 @@ public class INodeFileUnderConstructionWithSnapshot
public int destroySubtreeAndCollectBlocks(final Snapshot snapshot,
final BlocksMapUpdateInfo collectedBlocks) {
if (snapshot == null) {
clearReferences();
isCurrentFileDeleted = true;
} else {
if (diffs.deleteSnapshotDiff(snapshot, collectedBlocks) == null) {
if (diffs.deleteSnapshotDiff(snapshot, this, collectedBlocks) == null) {
//snapshot diff not found and nothing is deleted.
return 0;
}

26
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/INodeFileWithSnapshot.java
View File

@ -30,11 +30,17 @@ import org.apache.hadoop.hdfs.server.namenode.INodeFile;
public class INodeFileWithSnapshot extends INodeFile
implements FileWithSnapshot {
private final FileDiffList diffs;
private boolean isCurrentFileDeleted = false;
public INodeFileWithSnapshot(INodeFile f) {
this(f, f instanceof FileWithSnapshot?
((FileWithSnapshot)f).getDiffs(): null);
}
public INodeFileWithSnapshot(INodeFile f, FileDiffList diffs) {
super(f);
this.diffs = new FileDiffList(this, f instanceof FileWithSnapshot?
((FileWithSnapshot)f).getFileDiffList().asList(): null);
this.diffs = diffs != null? diffs: new FileDiffList();
this.diffs.setFactory(FileDiffFactory.INSTANCE);
}
@Override
@ -43,20 +49,18 @@ public class INodeFileWithSnapshot extends INodeFile
final String clientMachine,
final DatanodeDescriptor clientNode) {
return new INodeFileUnderConstructionWithSnapshot(this,
clientName, clientMachine, clientNode);
clientName, clientMachine, clientNode, getDiffs());
}
@Override
public boolean isCurrentFileDeleted() {
return getParent() == null;
return isCurrentFileDeleted;
}
@Override
public INodeFileWithSnapshot recordModification(final Snapshot latest) {
// if this object is NOT the latest snapshot copy, this object is created
// after the latest snapshot, then do NOT record modification.
if (this == getParent().getChild(getLocalNameBytes(), latest)) {
diffs.saveSelf2Snapshot(latest, null);
if (isInLatestSnapshot(latest)) {
diffs.saveSelf2Snapshot(latest, this, null);
}
return this;
}
@ -67,7 +71,7 @@ public class INodeFileWithSnapshot extends INodeFile
}
@Override
public FileDiffList getFileDiffList() {
public FileDiffList getDiffs() {
return diffs;
}
@ -95,9 +99,9 @@ public class INodeFileWithSnapshot extends INodeFile
public int destroySubtreeAndCollectBlocks(final Snapshot snapshot,
final BlocksMapUpdateInfo collectedBlocks) {
if (snapshot == null) {
clearReferences();
isCurrentFileDeleted = true;
} else {
if (diffs.deleteSnapshotDiff(snapshot, collectedBlocks) == null) {
if (diffs.deleteSnapshotDiff(snapshot, this, collectedBlocks) == null) {
//snapshot diff not found and nothing is deleted.
return 0;
}

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/Snapshot.java
View File

@ -90,15 +90,15 @@ public class Snapshot implements Comparable<byte[]> {
private final Root root;
Snapshot(int id, String name, INodeDirectorySnapshottable dir) {
this(id, DFSUtil.string2Bytes(name), dir, dir);
this(id, dir, dir);
this.root.setLocalName(DFSUtil.string2Bytes(name));
}
Snapshot(int id, byte[] name, INodeDirectory dir,
Snapshot(int id, INodeDirectory dir,
INodeDirectorySnapshottable parent) {
this.id = id;
this.root = new Root(dir);
this.root.setLocalName(name);
this.root.setParent(parent);
}

182
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotFSImageFormat.java
View File

@ -32,8 +32,10 @@ import org.apache.hadoop.hdfs.server.namenode.FSImageSerialization;
import org.apache.hadoop.hdfs.server.namenode.INode;
import org.apache.hadoop.hdfs.server.namenode.INodeDirectory;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot.ChildrenDiff;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot.FileDiff;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot.FileDiffList;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot.DirectoryDiff;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot.DirectoryDiffList;
import org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot.Root;
import org.apache.hadoop.hdfs.util.ReadOnlyList;
@ -67,20 +69,68 @@ public class SnapshotFSImageFormat {
* @param sNode The directory that the SnapshotDiff list belongs to.
* @param out The {@link DataOutputStream} to write.
*/
public static void saveSnapshotDiffs(INodeDirectoryWithSnapshot sNode,
DataOutputStream out) throws IOException {
// # of SnapshotDiff
List<DirectoryDiff> diffs = sNode.getDiffs().asList();
// Record the SnapshotDiff in reversed order, so that we can find the
// correct reference for INodes in the created list when loading the
// FSImage
out.writeInt(diffs.size());
for (int i = diffs.size() - 1; i >= 0; i--) {
DirectoryDiff sdiff = diffs.get(i);
sdiff.write(out);
private static <N extends INode, D extends AbstractINodeDiff<N, D>>
void saveINodeDiffs(final AbstractINodeDiffList<N, D> diffs,
final DataOutputStream out) throws IOException {
// Record the diffs in reversed order, so that we can find the correct
// reference for INodes in the created list when loading the FSImage
if (diffs == null) {
out.writeInt(-1); // no diffs
} else {
final List<D> list = diffs.asList();
final int size = list.size();
out.writeInt(size);
for (int i = size - 1; i >= 0; i--) {
list.get(i).write(out);
}
}
}
public static void saveDirectoryDiffList(final INodeDirectory dir,
final DataOutputStream out) throws IOException {
saveINodeDiffs(dir instanceof INodeDirectoryWithSnapshot?
((INodeDirectoryWithSnapshot)dir).getDiffs(): null, out);
}
public static void saveFileDiffList(final INodeFile file,
final DataOutputStream out) throws IOException {
saveINodeDiffs(file instanceof FileWithSnapshot?
((FileWithSnapshot)file).getDiffs(): null, out);
}
public static FileDiffList loadFileDiffList(DataInputStream in,
FSImageFormat.Loader loader) throws IOException {
final int size = in.readInt();
if (size == -1) {
return null;
} else {
final FileDiffList diffs = new FileDiffList();
FileDiff posterior = null;
for(int i = 0; i < size; i++) {
final FileDiff d = loadFileDiff(posterior, in, loader);
diffs.addFirst(d);
posterior = d;
}
return diffs;
}
}
private static FileDiff loadFileDiff(FileDiff posterior, DataInputStream in,
FSImageFormat.Loader loader) throws IOException {
// 1. Read the full path of the Snapshot root to identify the Snapshot
Snapshot snapshot = findSnapshot(FSImageSerialization.readString(in),
loader.getFSDirectoryInLoading());
// 2. Load file size
final long fileSize = in.readLong();
// 3. Load snapshotINode
final INodeFile snapshotINode = in.readBoolean()?
(INodeFile) loader.loadINodeWithLocalName(true, in): null;
return new FileDiff(snapshot, snapshotINode, posterior, fileSize);
}
/**
* Load a node stored in the created list from fsimage.
* @param createdNodeName The name of the created node.
@ -92,9 +142,9 @@ public class SnapshotFSImageFormat {
// the INode in the created list should be a reference to another INode
// in posterior SnapshotDiffs or one of the current children
for (DirectoryDiff postDiff : parent.getDiffs()) {
INode created = findCreated(createdNodeName, postDiff.getChildrenDiff());
if (created != null) {
return created;
INode d = postDiff.getChildrenDiff().searchDeleted(createdNodeName);
if (d != null) {
return d;
} // else go to the next SnapshotDiff
}
// use the current child
@ -107,41 +157,6 @@ public class SnapshotFSImageFormat {
return currentChild;
}
/**
* Search the given {@link ChildrenDiff} to find an inode matching the specific name.
* @param createdNodeName The name of the node for searching.
* @param diff The given {@link ChildrenDiff} where to search the node.
* @return The matched inode. Return null if no matched inode can be found.
*/
private static INode findCreated(byte[] createdNodeName, ChildrenDiff diff) {
INode c = diff.searchCreated(createdNodeName);
INode d = diff.searchDeleted(createdNodeName);
if (c == null && d != null) {
// if an INode with the same name is only contained in the deleted
// list, then the node should be the snapshot copy of a deleted
// node, and the node in the created list should be its reference
return d;
} else if (c != null && d != null) {
// in a posterior SnapshotDiff, if the created/deleted lists both
// contains nodes with the same name (c & d), there are two
// possibilities:
//
// 1) c and d are used to represent a modification, and
// 2) d indicates the deletion of the node, while c was originally
// contained in the created list of a later snapshot, but c was
// moved here because of the snapshot deletion.
//
// For case 1), c and d should be both INodeFile and should share
// the same blockInfo list.
if (c.isFile() && INodeFile.isOfSameFile((INodeFile) c, (INodeFile) d)) {
return c;
} else {
return d;
}
}
return null;
}
/**
* Load the created list from fsimage.
* @param parent The directory that the created list belongs to.
@ -169,8 +184,7 @@ public class SnapshotFSImageFormat {
* @param createdList The created list associated with the deleted list in
* the same Diff.
* @param in The {@link DataInputStream} to read.
* @param loader The {@link Loader} instance. Used to call the
* {@link Loader#loadINode(DataInputStream)} method.
* @param loader The {@link Loader} instance.
* @return The deleted list.
*/
private static List<INode> loadDeletedList(INodeDirectoryWithSnapshot parent,
@ -179,10 +193,7 @@ public class SnapshotFSImageFormat {
int deletedSize = in.readInt();
List<INode> deletedList = new ArrayList<INode>(deletedSize);
for (int i = 0; i < deletedSize; i++) {
byte[] deletedNodeName = new byte[in.readShort()];
in.readFully(deletedNodeName);
INode deleted = loader.loadINode(in);
deleted.setLocalName(deletedNodeName);
final INode deleted = loader.loadINodeWithLocalName(false, in);
deletedList.add(deleted);
// set parent: the parent field of an INode in the deleted list is not
// useful, but set the parent here to be consistent with the original
@ -192,11 +203,11 @@ public class SnapshotFSImageFormat {
&& ((INodeFile) deleted).getBlocks() == null) {
// if deleted is an INodeFile, and its blocks is null, then deleted
// must be an INodeFileWithLink, and we need to rebuild its next link
int c = Collections.binarySearch(createdList, deletedNodeName);
int c = Collections.binarySearch(createdList, deleted.getLocalNameBytes());
if (c < 0) {
throw new IOException(
"Cannot find the INode linked with the INode "
+ DFSUtil.bytes2String(deletedNodeName)
+ deleted.getLocalName()
+ " in deleted list while loading FSImage.");
}
// deleted must be an FileWithSnapshot (INodeFileSnapshot or
@ -239,29 +250,30 @@ public class SnapshotFSImageFormat {
private static Snapshot loadSnapshot(INodeDirectorySnapshottable parent,
DataInputStream in, FSImageFormat.Loader loader) throws IOException {
int snapshotId = in.readInt();
byte[] snapshotName = new byte[in.readShort()];
in.readFully(snapshotName);
final INodeDirectory rootNode = (INodeDirectory)loader.loadINode(in);
return new Snapshot(snapshotId, snapshotName, rootNode, parent);
INodeDirectory rootNode = (INodeDirectory)loader.loadINodeWithLocalName(
false, in);
return new Snapshot(snapshotId, rootNode, parent);
}
/**
* Load the {@link SnapshotDiff} list for the INodeDirectoryWithSnapshot
* directory.
* @param snapshottableParent The snapshottable directory for loading.
* @param dir The snapshottable directory for loading.
* @param numSnapshotDiffs The number of {@link SnapshotDiff} that the
* directory has.
* @param in The {@link DataInputStream} instance to read.
* @param loader The {@link Loader} instance that this loading procedure is
* using.
*/
public static void loadSnapshotDiffList(
INodeDirectoryWithSnapshot parentWithSnapshot, int numSnapshotDiffs,
DataInputStream in, FSImageFormat.Loader loader)
throws IOException {
for (int i = 0; i < numSnapshotDiffs; i++) {
DirectoryDiff diff = loadSnapshotDiff(parentWithSnapshot, in, loader);
parentWithSnapshot.getDiffs().addFirst(diff);
public static void loadDirectoryDiffList(INodeDirectory dir,
DataInputStream in, FSImageFormat.Loader loader) throws IOException {
final int size = in.readInt();
if (size != -1) {
INodeDirectoryWithSnapshot withSnapshot = (INodeDirectoryWithSnapshot)dir;
DirectoryDiffList diffs = withSnapshot.getDiffs();
for (int i = 0; i < size; i++) {
diffs.addFirst(loadDirectoryDiff(withSnapshot, in, loader));
}
}
}
@ -287,7 +299,7 @@ public class SnapshotFSImageFormat {
* using.
* @return The snapshotINode.
*/
private static INodeDirectory loadSnapshotINodeInSnapshotDiff(
private static INodeDirectory loadSnapshotINodeInDirectoryDiff(
Snapshot snapshot, DataInputStream in, FSImageFormat.Loader loader)
throws IOException {
// read the boolean indicating whether snapshotINode == Snapshot.Root
@ -296,37 +308,31 @@ public class SnapshotFSImageFormat {
return snapshot.getRoot();
} else {
// another boolean is used to indicate whether snapshotINode is non-null
if (in.readBoolean()) {
byte[] localName = new byte[in.readShort()];
in.readFully(localName);
INodeDirectory snapshotINode = (INodeDirectory) loader.loadINode(in);
snapshotINode.setLocalName(localName);
return snapshotINode;
}
return in.readBoolean()?
(INodeDirectory) loader.loadINodeWithLocalName(true, in): null;
}
return null;
}
/**
* Load {@link SnapshotDiff} from fsimage.
* Load {@link DirectoryDiff} from fsimage.
* @param parent The directory that the SnapshotDiff belongs to.
* @param in The {@link DataInputStream} instance to read.
* @param loader The {@link Loader} instance that this loading procedure is
* using.
* @return A {@link SnapshotDiff}.
* @return A {@link DirectoryDiff}.
*/
private static DirectoryDiff loadSnapshotDiff(
private static DirectoryDiff loadDirectoryDiff(
INodeDirectoryWithSnapshot parent, DataInputStream in,
FSImageFormat.Loader loader) throws IOException {
// 1. Load SnapshotDiff#childrenSize
int childrenSize = in.readInt();
// 2. Read the full path of the Snapshot's Root, identify
// SnapshotDiff#Snapshot
// 1. Read the full path of the Snapshot root to identify the Snapshot
Snapshot snapshot = findSnapshot(FSImageSerialization.readString(in),
loader.getFSDirectoryInLoading());
// 2. Load DirectoryDiff#childrenSize
int childrenSize = in.readInt();
// 3. Load SnapshotDiff#snapshotINode
INodeDirectory snapshotINode = loadSnapshotINodeInSnapshotDiff(snapshot,
// 3. Load DirectoryDiff#snapshotINode
INodeDirectory snapshotINode = loadSnapshotINodeInDirectoryDiff(snapshot,
in, loader);
// 4. Load the created list in SnapshotDiff#Diff

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotManager.java
View File

@ -224,7 +224,7 @@ public class SnapshotManager implements SnapshotStats {
SnapshottableDirectoryStatus status = new SnapshottableDirectoryStatus(
dir.getModificationTime(), dir.getAccessTime(),
dir.getFsPermission(), dir.getUserName(), dir.getGroupName(),
dir.getLocalNameBytes(), dir.getNumSnapshots(),
dir.getLocalNameBytes(), dir.getId(), dir.getNumSnapshots(),
dir.getSnapshotQuota(), dir.getParent() == null ? INode.EMPTY_BYTES
: DFSUtil.string2Bytes(dir.getParent().getFullPathName()));
statusList.add(status);

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/diff/Diff.java
View File

@ -162,12 +162,16 @@ public class Diff<K, E extends Diff.Element<K>> {
return deleted == null? Collections.<E>emptyList(): deleted;
}
public int searchCreatedIndex(final K name) {
return search(created, name);
}
/**
* @return null if the element is not found;
* otherwise, return the element in the c-list.
*/
public E searchCreated(final K name) {
final int c = search(created, name);
final int c = searchCreatedIndex(name);
return c < 0 ? null : created.get(c);
}

4
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/CreateEditsLog.java
View File

@ -63,7 +63,7 @@ public class CreateEditsLog {
PermissionStatus p = new PermissionStatus("joeDoe", "people",
new FsPermission((short)0777));
INodeDirectory dirInode = new INodeDirectory(INodeId.GRANDFATHER_INODE_ID,
p, 0L);
null, p, 0L);
editLog.logMkDir(BASE_PATH, dirInode);
long blockSize = 10;
BlockInfo[] blocks = new BlockInfo[blocksPerFile];
@ -92,7 +92,7 @@ public class CreateEditsLog {
// Log the new sub directory in edits
if ((iF % nameGenerator.getFilesPerDirectory()) == 0) {
String currentDir = nameGenerator.getCurrentDir();
dirInode = new INodeDirectory(INodeId.GRANDFATHER_INODE_ID, p, 0L);
dirInode = new INodeDirectory(INodeId.GRANDFATHER_INODE_ID, null, p, 0L);
editLog.logMkDir(currentDir, dirInode);
}
editLog.logOpenFile(filePath, new INodeFileUnderConstruction(

4
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/FSImageTestUtil.java
View File

@ -47,6 +47,7 @@ import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.common.Storage.StorageDirType;
import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory;
@ -217,7 +218,8 @@ public abstract class FSImageTestUtil {
FsPermission.createImmutable((short)0755));
for (int i = 1; i <= numDirs; i++) {
String dirName = "dir" + i;
INodeDirectory dir = new INodeDirectory(newInodeId + i -1, dirName, perms);
INodeDirectory dir = new INodeDirectory(newInodeId + i -1,
DFSUtil.string2Bytes(dirName), perms, 0L);
editLog.logMkDir("/" + dirName, dir);
}
editLog.logSync();

46
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSImageWithSnapshot.java
View File

@ -24,8 +24,10 @@ import java.io.PrintWriter;
import java.util.EnumSet;
import java.util.Random;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
@ -34,6 +36,7 @@ import org.apache.hadoop.hdfs.client.HdfsDataOutputStream.SyncFlag;
import org.apache.hadoop.hdfs.server.namenode.NNStorage.NameNodeFile;
import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotTestHelper;
import org.apache.hadoop.hdfs.util.Canceler;
import org.apache.log4j.Level;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
@ -42,6 +45,11 @@ import org.junit.Test;
* Test FSImage save/load when Snapshot is supported
*/
public class TestFSImageWithSnapshot {
{
SnapshotTestHelper.disableLogs();
((Log4JLogger)INode.LOG).getLogger().setLevel(Level.ALL);
}
static final long seed = 0;
static final short REPLICATION = 3;
static final int BLOCKSIZE = 1024;
@ -160,36 +168,49 @@ public class TestFSImageWithSnapshot {
* 6. Dump the FSDirectory again and compare the two dumped string.
* </pre>
*/
// TODO: fix snapshot fsimage
// @Test
@Test
public void testSaveLoadImage() throws Exception {
int s = 0;
// make changes to the namesystem
hdfs.mkdirs(dir);
hdfs.allowSnapshot(dir.toString());
hdfs.createSnapshot(dir, "s0");
hdfs.createSnapshot(dir, "s" + ++s);
Path sub1 = new Path(dir, "sub1");
hdfs.mkdirs(sub1);
hdfs.setPermission(sub1, new FsPermission((short)0777));
Path sub11 = new Path(sub1, "sub11");
hdfs.mkdirs(sub11);
checkImage(s);
hdfs.createSnapshot(dir, "s" + ++s);
Path sub1file1 = new Path(sub1, "sub1file1");
Path sub1file2 = new Path(sub1, "sub1file2");
DFSTestUtil.createFile(hdfs, sub1file1, BLOCKSIZE, REPLICATION, seed);
DFSTestUtil.createFile(hdfs, sub1file2, BLOCKSIZE, REPLICATION, seed);
checkImage(s);
hdfs.createSnapshot(dir, "s1");
hdfs.createSnapshot(dir, "s" + ++s);
Path sub2 = new Path(dir, "sub2");
Path sub2file1 = new Path(sub2, "sub2file1");
Path sub2file2 = new Path(sub2, "sub2file2");
DFSTestUtil.createFile(hdfs, sub2file1, BLOCKSIZE, REPLICATION, seed);
DFSTestUtil.createFile(hdfs, sub2file2, BLOCKSIZE, REPLICATION, seed);
checkImage(s);
hdfs.createSnapshot(dir, "s" + ++s);
hdfs.setReplication(sub1file1, (short) (REPLICATION - 1));
hdfs.delete(sub1file2, true);
hdfs.createSnapshot(dir, "s2");
hdfs.setOwner(sub2, "dr.who", "unknown");
hdfs.delete(sub2file2, true);
checkImage(s);
}
void checkImage(int s) throws IOException {
final String name = "s" + s;
// dump the fsdir tree
File fsnBefore = dumpTree2File("before");
File fsnBefore = dumpTree2File(name + "_before");
// save the namesystem to a temp file
File imageFile = saveFSImageToTempFile();
@ -206,7 +227,7 @@ public class TestFSImageWithSnapshot {
loadFSImageFromTempFile(imageFile);
// dump the fsdir tree again
File fsnAfter = dumpTree2File("after");
File fsnAfter = dumpTree2File(name + "_after");
// compare two dumped tree
SnapshotTestHelper.compareDumpedTreeInFile(fsnBefore, fsnAfter);
@ -215,8 +236,7 @@ public class TestFSImageWithSnapshot {
/**
* Test the fsimage saving/loading while file appending.
*/
// TODO: fix snapshot fsimage
// @Test
@Test
public void testSaveLoadImageWithAppending() throws Exception {
Path sub1 = new Path(dir, "sub1");
Path sub1file1 = new Path(sub1, "sub1file1");

4
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFsLimits.java
View File

@ -31,6 +31,7 @@ import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.FSLimitException.MaxDirectoryItemsExceededException;
import org.apache.hadoop.hdfs.protocol.FSLimitException.PathComponentTooLongException;
@ -154,8 +155,7 @@ public class TestFsLimits {
if (fs == null) fs = new MockFSDirectory();
INode child = new INodeDirectory(getMockNamesystem().allocateNewInodeId(),
name, perms);
child.setLocalName(name);
DFSUtil.string2Bytes(name), perms, 0L);
Class<?> generated = null;
try {

57
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestINodeFile.java
View File

@ -37,6 +37,7 @@ import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
@ -50,10 +51,15 @@ public class TestINodeFile {
static final short BLOCKBITS = 48;
static final long BLKSIZE_MAXVALUE = ~(0xffffL << BLOCKBITS);
private String userName = "Test";
private final PermissionStatus perm = new PermissionStatus(
"userName", null, FsPermission.getDefault());
private short replication;
private long preferredBlockSize;
INodeFile createINodeFile(short replication, long preferredBlockSize) {
return new INodeFile(INodeId.GRANDFATHER_INODE_ID, null, perm, 0L, 0L,
null, replication, preferredBlockSize);
}
/**
* Test for the Replication value. Sets a value and checks if it was set
* correct.
@ -62,9 +68,7 @@ public class TestINodeFile {
public void testReplication () {
replication = 3;
preferredBlockSize = 128*1024*1024;
INodeFile inf = new INodeFile(INodeId.GRANDFATHER_INODE_ID,
new PermissionStatus(userName, null, FsPermission.getDefault()), null,
replication, 0L, 0L, preferredBlockSize);
INodeFile inf = createINodeFile(replication, preferredBlockSize);
assertEquals("True has to be returned in this case", replication,
inf.getFileReplication());
}
@ -79,9 +83,7 @@ public class TestINodeFile {
throws IllegalArgumentException {
replication = -1;
preferredBlockSize = 128*1024*1024;
new INodeFile(INodeId.GRANDFATHER_INODE_ID, new PermissionStatus(userName,
null, FsPermission.getDefault()), null, replication, 0L, 0L,
preferredBlockSize);
createINodeFile(replication, preferredBlockSize);
}
/**
@ -92,9 +94,7 @@ public class TestINodeFile {
public void testPreferredBlockSize () {
replication = 3;
preferredBlockSize = 128*1024*1024;
INodeFile inf = new INodeFile(INodeId.GRANDFATHER_INODE_ID,
new PermissionStatus(userName, null, FsPermission.getDefault()), null,
replication, 0L, 0L, preferredBlockSize);
INodeFile inf = createINodeFile(replication, preferredBlockSize);
assertEquals("True has to be returned in this case", preferredBlockSize,
inf.getPreferredBlockSize());
}
@ -103,9 +103,7 @@ public class TestINodeFile {
public void testPreferredBlockSizeUpperBound () {
replication = 3;
preferredBlockSize = BLKSIZE_MAXVALUE;
INodeFile inf = new INodeFile(INodeId.GRANDFATHER_INODE_ID,
new PermissionStatus(userName, null, FsPermission.getDefault()), null,
replication, 0L, 0L, preferredBlockSize);
INodeFile inf = createINodeFile(replication, preferredBlockSize);
assertEquals("True has to be returned in this case", BLKSIZE_MAXVALUE,
inf.getPreferredBlockSize());
}
@ -120,9 +118,7 @@ public class TestINodeFile {
throws IllegalArgumentException {
replication = 3;
preferredBlockSize = -1;
new INodeFile(INodeId.GRANDFATHER_INODE_ID, new PermissionStatus(userName,
null, FsPermission.getDefault()), null, replication, 0L, 0L,
preferredBlockSize);
createINodeFile(replication, preferredBlockSize);
}
/**
@ -135,26 +131,20 @@ public class TestINodeFile {
throws IllegalArgumentException {
replication = 3;
preferredBlockSize = BLKSIZE_MAXVALUE+1;
new INodeFile(INodeId.GRANDFATHER_INODE_ID, new PermissionStatus(userName,
null, FsPermission.getDefault()), null, replication, 0L, 0L,
preferredBlockSize);
createINodeFile(replication, preferredBlockSize);
}
@Test
public void testGetFullPathName() {
PermissionStatus perms = new PermissionStatus(
userName, null, FsPermission.getDefault());
replication = 3;
preferredBlockSize = 128*1024*1024;
INodeFile inf = new INodeFile(INodeId.GRANDFATHER_INODE_ID, perms, null,
replication, 0L, 0L, preferredBlockSize);
INodeFile inf = createINodeFile(replication, preferredBlockSize);
inf.setLocalName("f");
INodeDirectory root = new INodeDirectory(INodeId.GRANDFATHER_INODE_ID,
INodeDirectory.ROOT_NAME, perms);
INodeDirectory dir = new INodeDirectory(INodeId.GRANDFATHER_INODE_ID, "d",
perms);
INodeDirectory.ROOT_NAME, perm, 0L);
INodeDirectory dir = new INodeDirectory(INodeId.GRANDFATHER_INODE_ID,
DFSUtil.string2Bytes("d"), perm, 0L);
assertEquals("f", inf.getFullPathName());
assertEquals("", inf.getLocalParentDir());
@ -250,9 +240,7 @@ public class TestINodeFile {
preferredBlockSize = 128 * 1024 * 1024;
INodeFile[] iNodes = new INodeFile[nCount];
for (int i = 0; i < nCount; i++) {
PermissionStatus perms = new PermissionStatus(userName, null,
FsPermission.getDefault());
iNodes[i] = new INodeFile(i, perms, null, replication, 0L, 0L,
iNodes[i] = new INodeFile(i, null, perm, 0L, 0L, null, replication,
preferredBlockSize);
iNodes[i].setLocalName(fileNamePrefix + Integer.toString(i));
BlockInfo newblock = new BlockInfo(replication);
@ -270,8 +258,6 @@ public class TestINodeFile {
@Test
public void testValueOf () throws IOException {
final String path = "/testValueOf";
final PermissionStatus perm = new PermissionStatus(
userName, null, FsPermission.getDefault());
final short replication = 3;
{//cast from null
@ -303,8 +289,7 @@ public class TestINodeFile {
}
{//cast from INodeFile
final INode from = new INodeFile(INodeId.GRANDFATHER_INODE_ID, perm,
null, replication, 0L, 0L, preferredBlockSize);
final INode from = createINodeFile(replication, preferredBlockSize);
//cast to INodeFile, should success
final INodeFile f = INodeFile.valueOf(from, path);
@ -349,8 +334,8 @@ public class TestINodeFile {
}
{//cast from INodeDirectory
final INode from = new INodeDirectory(INodeId.GRANDFATHER_INODE_ID, perm,
0L);
final INode from = new INodeDirectory(INodeId.GRANDFATHER_INODE_ID, null,
perm, 0L);
//cast to INodeFile, should fail
try {

4
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestSnapshotPathINodes.java
View File

@ -275,7 +275,9 @@ public class TestSnapshotPathINodes {
assertSnapshot(nodesInPath, true, snapshot, 3);
// Check the INode for file1 (snapshot file)
assertINodeFile(inodes[inodes.length - 1], file1);
final INode inode = inodes[inodes.length - 1];
assertEquals(file1.getName(), inode.getLocalName());
assertEquals(INodeFileWithSnapshot.class, inode.getClass());
}
// Check the INodes for path /TestSnapshot/sub1/file1

28
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotTestHelper.java
View File

@ -45,14 +45,18 @@ import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoUnderConstruction;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
import org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceStorage;
import org.apache.hadoop.hdfs.server.datanode.DataBlockScanner;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.datanode.DirectoryScanner;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.namenode.INode;
import org.apache.hadoop.hdfs.server.namenode.INodeDirectory;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
import org.apache.hadoop.hdfs.server.namenode.LeaseManager;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.http.HttpServer;
import org.apache.hadoop.ipc.ProtobufRpcEngine.Server;
import org.apache.hadoop.metrics2.impl.MetricsSystemImpl;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.log4j.Level;
import org.junit.Assert;
@ -64,7 +68,7 @@ public class SnapshotTestHelper {
public static final Log LOG = LogFactory.getLog(SnapshotTestHelper.class);
/** Disable the logs that are not very useful for snapshot related tests. */
static void disableLogs() {
public static void disableLogs() {
final String[] lognames = {
"org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner",
"org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl",
@ -73,11 +77,15 @@ public class SnapshotTestHelper {
for(String n : lognames) {
setLevel2OFF(LogFactory.getLog(n));
}
setLevel2OFF(LogFactory.getLog(UserGroupInformation.class));
setLevel2OFF(LogFactory.getLog(BlockManager.class));
setLevel2OFF(LogFactory.getLog(FSNamesystem.class));
setLevel2OFF(LogFactory.getLog(DirectoryScanner.class));
setLevel2OFF(LogFactory.getLog(MetricsSystemImpl.class));
setLevel2OFF(DataBlockScanner.LOG);
setLevel2OFF(HttpServer.LOG);
setLevel2OFF(DataNode.LOG);
setLevel2OFF(BlockPoolSliceStorage.LOG);
setLevel2OFF(LeaseManager.LOG);
@ -175,6 +183,15 @@ public class SnapshotTestHelper {
*/
public static void compareDumpedTreeInFile(File file1, File file2)
throws IOException {
try {
compareDumpedTreeInFile(file1, file2, false);
} catch(Throwable t) {
LOG.info("FAILED compareDumpedTreeInFile(" + file1 + ", " + file2 + ")", t);
compareDumpedTreeInFile(file1, file2, true);
}
}
private static void compareDumpedTreeInFile(File file1, File file2,
boolean print) throws IOException {
BufferedReader reader1 = new BufferedReader(new FileReader(file1));
BufferedReader reader2 = new BufferedReader(new FileReader(file2));
try {
@ -182,6 +199,11 @@ public class SnapshotTestHelper {
String line2 = "";
while ((line1 = reader1.readLine()) != null
&& (line2 = reader2.readLine()) != null) {
if (print) {
System.out.println();
System.out.println("1) " + line1);
System.out.println("2) " + line2);
}
// skip the hashCode part of the object string during the comparison,
// also ignore the difference between INodeFile/INodeFileWithSnapshot
line1 = line1.replaceAll("INodeFileWithSnapshot", "INodeFile");

4
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestNestedSnapshots.java
View File

@ -28,6 +28,7 @@ import org.apache.hadoop.fs.UnresolvedLinkException;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
@ -171,7 +172,8 @@ public class TestNestedSnapshots {
public void testIdCmp() {
final PermissionStatus perm = PermissionStatus.createImmutable(
"user", "group", FsPermission.createImmutable((short)0));
final INodeDirectory dir = new INodeDirectory(0, "foo", perm);
final INodeDirectory dir = new INodeDirectory(0,
DFSUtil.string2Bytes("foo"), perm, 0L);
final INodeDirectorySnapshottable snapshottable
= new INodeDirectorySnapshottable(dir);
final Snapshot[] snapshots = {

3
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshot.java
View File

@ -268,8 +268,7 @@ public class TestSnapshot {
modifyCurrentDirAndCheckSnapshots(new Modification[]{chmod, chown});
// check fsimage saving/loading
// TODO: fix fsimage
// checkFSImage();
checkFSImage();
}
}

4
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/diff/TestDiff.java
View File

@ -23,6 +23,7 @@ import java.util.Random;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.server.namenode.INode;
import org.apache.hadoop.hdfs.server.namenode.INodeDirectory;
import org.apache.hadoop.hdfs.server.namenode.snapshot.diff.Diff.Container;
@ -240,7 +241,8 @@ public class TestDiff {
}
static INode newINode(int n, int width) {
return new INodeDirectory(n, String.format("n%0" + width + "d", n), PERM);
byte[] name = DFSUtil.string2Bytes(String.format("n%0" + width + "d", n));
return new INodeDirectory(n, name, PERM, 0L);
}
static void create(INode inode, final List<INode> current, Diff<byte[], INode> diff) {