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HDFS-5537. Remove FileWithSnapshot interface. Contributed by jing9 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546184 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tsz-wo Sze 2013-11-27 20:32:16 +00:00
parent 2214871d91
commit 8df119da21
15 changed files with 280 additions and 289 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -224,6 +224,8 @@ Trunk (Unreleased)
HDFS-5545. Allow specifying endpoints for listeners in HttpServer. (Haohui
Mai via jing9)
HDFS-5537. Remove FileWithSnapshot interface. (jing9 via szetszwo)
OPTIMIZATIONS
HDFS-5349. DNA_CACHE and DNA_UNCACHE should be by blockId only. (cmccabe)

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
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@ -455,8 +455,8 @@ public class FSDirectory implements Closeable {
boolean unprotectedRemoveBlock(String path,
INodeFile fileNode, Block block) throws IOException {
Preconditions.checkArgument(fileNode.isUnderConstruction());
// modify file-> block and blocksMap
// fileNode should be under construction
boolean removed = fileNode.removeLastBlock(block);
if (!removed) {
return false;

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormat.java
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@ -52,7 +52,7 @@ 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.common.InconsistentFSStateException;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot.FileDiffList;
import org.apache.hadoop.hdfs.server.namenode.snapshot.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.INodeFileWithSnapshot;

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FileUnderConstructionFeature.java
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@ -26,7 +26,7 @@ import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo;
/**
* I-node for file being written.
* Feature for under-construction file.
*/
@InterfaceAudience.Private
public class FileUnderConstructionFeature extends INodeFile.Feature {

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INode.java
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@ -35,7 +35,6 @@ import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.QuotaExceededException;
import org.apache.hadoop.hdfs.server.namenode.INodeReference.DstReference;
import org.apache.hadoop.hdfs.server.namenode.INodeReference.WithName;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot;
import org.apache.hadoop.hdfs.util.ChunkedArrayList;
@ -315,7 +314,7 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
* 1.2.2 Else do nothing with the current INode. Recursively clean its
* children.
*
* 1.3 The current inode is a {@link FileWithSnapshot}.
* 1.3 The current inode is a file with snapshot.
* Call recordModification(..) to capture the current states.
* Mark the INode as deleted.
*
@ -328,7 +327,7 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
* 2. When deleting a snapshot.
* 2.1 To clean {@link INodeFile}: do nothing.
* 2.2 To clean {@link INodeDirectory}: recursively clean its children.
* 2.3 To clean {@link FileWithSnapshot}: delete the corresponding snapshot in
* 2.3 To clean INodeFile with snapshot: delete the corresponding snapshot in
* its diff list.
* 2.4 To clean {@link INodeDirectoryWithSnapshot}: delete the corresponding
* snapshot in its diff list. Recursively clean its children.

44
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFile.java
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@ -32,10 +32,8 @@ import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoUnderConstruction;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
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.FileWithSnapshot.FileDiff;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot.FileDiffList;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot.Util;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileDiff;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileDiffList;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileWithSnapshot;
import org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot;
@ -188,7 +186,7 @@ public class INodeFile extends INodeWithAdditionalFields
INodeFile toUnderConstruction(String clientName, String clientMachine,
DatanodeDescriptor clientNode) {
Preconditions.checkState(!isUnderConstruction(),
"file is already an INodeFileUnderConstruction");
"file is already under construction");
FileUnderConstructionFeature uc = new FileUnderConstructionFeature(
clientName, clientMachine, clientNode);
addFeature(uc);
@ -200,6 +198,8 @@ public class INodeFile extends INodeWithAdditionalFields
* feature.
*/
public INodeFile toCompleteFile(long mtime) {
Preconditions.checkState(isUnderConstruction(),
"file is no longer under construction");
FileUnderConstructionFeature uc = getFileUnderConstructionFeature();
if (uc != null) {
assertAllBlocksComplete();
@ -226,10 +226,11 @@ public class INodeFile extends INodeWithAdditionalFields
this.blocks[index] = blk;
}
@Override // BlockCollection
@Override // BlockCollection, the file should be under construction
public BlockInfoUnderConstruction setLastBlock(BlockInfo lastBlock,
DatanodeDescriptor[] locations) throws IOException {
Preconditions.checkState(isUnderConstruction());
Preconditions.checkState(isUnderConstruction(),
"file is no longer under construction");
if (numBlocks() == 0) {
throw new IOException("Failed to set last block: File is empty.");
@ -247,6 +248,8 @@ public class INodeFile extends INodeWithAdditionalFields
* the last one on the list.
*/
boolean removeLastBlock(Block oldblock) {
Preconditions.checkState(isUnderConstruction(),
"file is no longer under construction");
if (blocks == null || blocks.length == 0) {
return false;
}
@ -298,10 +301,8 @@ public class INodeFile extends INodeWithAdditionalFields
}
@Override
public final short getBlockReplication() {
return this instanceof FileWithSnapshot?
Util.getBlockReplication((FileWithSnapshot)this)
: getFileReplication(null);
public short getBlockReplication() {
return getFileReplication(null);
}
/** Set the replication factor of this file. */
@ -421,8 +422,8 @@ public class INodeFile extends INodeWithAdditionalFields
clear();
removedINodes.add(this);
if (this instanceof FileWithSnapshot) {
((FileWithSnapshot) this).getDiffs().clear();
if (this instanceof INodeFileWithSnapshot) {
((INodeFileWithSnapshot) this).getDiffs().clear();
}
}
@ -437,8 +438,8 @@ public class INodeFile extends INodeWithAdditionalFields
boolean useCache, int lastSnapshotId) {
long nsDelta = 1;
final long dsDelta;
if (this instanceof FileWithSnapshot) {
FileDiffList fileDiffList = ((FileWithSnapshot) this).getDiffs();
if (this instanceof INodeFileWithSnapshot) {
FileDiffList fileDiffList = ((INodeFileWithSnapshot) this).getDiffs();
Snapshot last = fileDiffList.getLastSnapshot();
List<FileDiff> diffs = fileDiffList.asList();
@ -470,8 +471,8 @@ public class INodeFile extends INodeWithAdditionalFields
private void computeContentSummary4Snapshot(final Content.Counts counts) {
// file length and diskspace only counted for the latest state of the file
// i.e. either the current state or the last snapshot
if (this instanceof FileWithSnapshot) {
final FileWithSnapshot withSnapshot = (FileWithSnapshot)this;
if (this instanceof INodeFileWithSnapshot) {
final INodeFileWithSnapshot withSnapshot = (INodeFileWithSnapshot) this;
final FileDiffList diffs = withSnapshot.getDiffs();
final int n = diffs.asList().size();
counts.add(Content.FILE, n);
@ -487,8 +488,8 @@ public class INodeFile extends INodeWithAdditionalFields
}
private void computeContentSummary4Current(final Content.Counts counts) {
if (this instanceof FileWithSnapshot
&& ((FileWithSnapshot)this).isCurrentFileDeleted()) {
if (this instanceof INodeFileWithSnapshot
&& ((INodeFileWithSnapshot) this).isCurrentFileDeleted()) {
return;
}
@ -507,8 +508,9 @@ public class INodeFile extends INodeWithAdditionalFields
* otherwise, get the file size from the given snapshot.
*/
public final long computeFileSize(Snapshot snapshot) {
if (snapshot != null && this instanceof FileWithSnapshot) {
final FileDiff d = ((FileWithSnapshot)this).getDiffs().getDiff(snapshot);
if (snapshot != null && this instanceof INodeFileWithSnapshot) {
final FileDiff d = ((INodeFileWithSnapshot) this).getDiffs().getDiff(
snapshot);
if (d != null) {
return d.getFileSize();
}

18
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeReference.java
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@ -26,8 +26,8 @@ import java.util.List;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.hdfs.protocol.QuotaExceededException;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot;
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 com.google.common.base.Preconditions;
@ -102,8 +102,8 @@ public abstract class INodeReference extends INode {
}
if (wn != null) {
INode referred = wc.getReferredINode();
if (referred instanceof FileWithSnapshot) {
return ((FileWithSnapshot) referred).getDiffs().getPrior(
if (referred instanceof INodeFileWithSnapshot) {
return ((INodeFileWithSnapshot) referred).getDiffs().getPrior(
wn.lastSnapshotId);
} else if (referred instanceof INodeDirectoryWithSnapshot) {
return ((INodeDirectoryWithSnapshot) referred).getDiffs().getPrior(
@ -547,8 +547,8 @@ public abstract class INodeReference extends INode {
private Snapshot getSelfSnapshot() {
INode referred = getReferredINode().asReference().getReferredINode();
Snapshot snapshot = null;
if (referred instanceof FileWithSnapshot) {
snapshot = ((FileWithSnapshot) referred).getDiffs().getPrior(
if (referred instanceof INodeFileWithSnapshot) {
snapshot = ((INodeFileWithSnapshot) referred).getDiffs().getPrior(
lastSnapshotId);
} else if (referred instanceof INodeDirectoryWithSnapshot) {
snapshot = ((INodeDirectoryWithSnapshot) referred).getDiffs().getPrior(
@ -637,10 +637,10 @@ public abstract class INodeReference extends INode {
Snapshot snapshot = getSelfSnapshot(prior);
INode referred = getReferredINode().asReference().getReferredINode();
if (referred instanceof FileWithSnapshot) {
if (referred instanceof INodeFileWithSnapshot) {
// if referred is a file, it must be a FileWithSnapshot since we did
// recordModification before the rename
FileWithSnapshot sfile = (FileWithSnapshot) referred;
INodeFileWithSnapshot sfile = (INodeFileWithSnapshot) referred;
// make sure we mark the file as deleted
sfile.deleteCurrentFile();
try {
@ -671,8 +671,8 @@ public abstract class INodeReference extends INode {
WithCount wc = (WithCount) getReferredINode().asReference();
INode referred = wc.getReferredINode();
Snapshot lastSnapshot = null;
if (referred instanceof FileWithSnapshot) {
lastSnapshot = ((FileWithSnapshot) referred).getDiffs()
if (referred instanceof INodeFileWithSnapshot) {
lastSnapshot = ((INodeFileWithSnapshot) referred).getDiffs()
.getLastSnapshot();
} else if (referred instanceof INodeDirectoryWithSnapshot) {
lastSnapshot = ((INodeDirectoryWithSnapshot) referred)

92
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/FileDiff.java Normal file
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@ -0,0 +1,92 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.server.namenode.snapshot;
import java.io.DataOutput;
import java.io.IOException;
import java.util.List;
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;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
import org.apache.hadoop.hdfs.server.namenode.INodeFileAttributes;
import org.apache.hadoop.hdfs.server.namenode.Quota;
import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotFSImageFormat.ReferenceMap;
/**
* The difference of an {@link INodeFile} between two snapshots.
*/
public class FileDiff extends
AbstractINodeDiff<INodeFileWithSnapshot, INodeFileAttributes, FileDiff> {
/** The file size at snapshot creation time. */
private final long fileSize;
FileDiff(Snapshot snapshot, INodeFile file) {
super(snapshot, null, null);
fileSize = file.computeFileSize();
}
/** Constructor used by FSImage loading */
FileDiff(Snapshot snapshot, INodeFileAttributes snapshotINode,
FileDiff posteriorDiff, long fileSize) {
super(snapshot, snapshotINode, posteriorDiff);
this.fileSize = fileSize;
}
/** @return the file size in the snapshot. */
public long getFileSize() {
return fileSize;
}
@Override
Quota.Counts combinePosteriorAndCollectBlocks(
INodeFileWithSnapshot currentINode, FileDiff posterior,
BlocksMapUpdateInfo collectedBlocks, final List<INode> removedINodes) {
return currentINode.updateQuotaAndCollectBlocks(posterior, collectedBlocks,
removedINodes);
}
@Override
public String toString() {
return super.toString() + " fileSize=" + fileSize + ", rep="
+ (snapshotINode == null? "?": snapshotINode.getFileReplication());
}
@Override
void write(DataOutput out, ReferenceMap referenceMap) throws IOException {
writeSnapshot(out);
out.writeLong(fileSize);
// write snapshotINode
if (snapshotINode != null) {
out.writeBoolean(true);
FSImageSerialization.writeINodeFileAttributes(snapshotINode, out);
} else {
out.writeBoolean(false);
}
}
@Override
Quota.Counts destroyDiffAndCollectBlocks(INodeFileWithSnapshot currentINode,
BlocksMapUpdateInfo collectedBlocks, final List<INode> removedINodes) {
return currentINode.updateQuotaAndCollectBlocks(this, collectedBlocks,
removedINodes);
}
}

35
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/FileDiffList.java Normal file
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@ -0,0 +1,35 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.server.namenode.snapshot;
import org.apache.hadoop.hdfs.server.namenode.INodeFileAttributes;
/** A list of FileDiffs for storing snapshot data. */
public class FileDiffList extends
AbstractINodeDiffList<INodeFileWithSnapshot, INodeFileAttributes, FileDiff> {
@Override
FileDiff createDiff(Snapshot snapshot, INodeFileWithSnapshot file) {
return new FileDiff(snapshot, file);
}
@Override
INodeFileAttributes createSnapshotCopy(INodeFileWithSnapshot currentINode) {
return new INodeFileAttributes.SnapshotCopy(currentINode);
}
}

227
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/FileWithSnapshot.java
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@ -1,227 +0,0 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.server.namenode.snapshot;
import java.io.DataOutput;
import java.io.IOException;
import java.util.List;
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;
import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
import org.apache.hadoop.hdfs.server.namenode.INodeFileAttributes;
import org.apache.hadoop.hdfs.server.namenode.Quota;
import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotFSImageFormat.ReferenceMap;
/**
* An interface for {@link INodeFile} to support snapshot.
*/
@InterfaceAudience.Private
public interface FileWithSnapshot {
/**
* The difference of an {@link INodeFile} between two snapshots.
*/
public static class FileDiff extends AbstractINodeDiff<INodeFile, INodeFileAttributes, FileDiff> {
/** The file size at snapshot creation time. */
private final long fileSize;
private FileDiff(Snapshot snapshot, INodeFile file) {
super(snapshot, null, null);
fileSize = file.computeFileSize();
}
/** Constructor used by FSImage loading */
FileDiff(Snapshot snapshot, INodeFileAttributes snapshotINode,
FileDiff posteriorDiff, long fileSize) {
super(snapshot, snapshotINode, posteriorDiff);
this.fileSize = fileSize;
}
/** @return the file size in the snapshot. */
public long getFileSize() {
return fileSize;
}
private static Quota.Counts updateQuotaAndCollectBlocks(
INodeFile currentINode, FileDiff removed,
BlocksMapUpdateInfo collectedBlocks, final List<INode> removedINodes) {
FileWithSnapshot sFile = (FileWithSnapshot) currentINode;
long oldDiskspace = currentINode.diskspaceConsumed();
if (removed.snapshotINode != null) {
short replication = removed.snapshotINode.getFileReplication();
short currentRepl = currentINode.getBlockReplication();
if (currentRepl == 0) {
oldDiskspace = currentINode.computeFileSize(true, true) * replication;
} else if (replication > currentRepl) {
oldDiskspace = oldDiskspace / currentINode.getBlockReplication()
* replication;
}
}
Util.collectBlocksAndClear(sFile, collectedBlocks, removedINodes);
long dsDelta = oldDiskspace - currentINode.diskspaceConsumed();
return Quota.Counts.newInstance(0, dsDelta);
}
@Override
Quota.Counts combinePosteriorAndCollectBlocks(INodeFile currentINode,
FileDiff posterior, BlocksMapUpdateInfo collectedBlocks,
final List<INode> removedINodes) {
return updateQuotaAndCollectBlocks(currentINode, posterior,
collectedBlocks, removedINodes);
}
@Override
public String toString() {
return super.toString() + " fileSize=" + fileSize + ", rep="
+ (snapshotINode == null? "?": snapshotINode.getFileReplication());
}
@Override
void write(DataOutput out, ReferenceMap referenceMap) throws IOException {
writeSnapshot(out);
out.writeLong(fileSize);
// write snapshotINode
if (snapshotINode != null) {
out.writeBoolean(true);
FSImageSerialization.writeINodeFileAttributes(snapshotINode, out);
} else {
out.writeBoolean(false);
}
}
@Override
Quota.Counts destroyDiffAndCollectBlocks(INodeFile currentINode,
BlocksMapUpdateInfo collectedBlocks, final List<INode> removedINodes) {
return updateQuotaAndCollectBlocks(currentINode, this,
collectedBlocks, removedINodes);
}
}
/** A list of FileDiffs for storing snapshot data. */
public static class FileDiffList
extends AbstractINodeDiffList<INodeFile, INodeFileAttributes, FileDiff> {
@Override
FileDiff createDiff(Snapshot snapshot, INodeFile file) {
return new FileDiff(snapshot, file);
}
@Override
INodeFileAttributes createSnapshotCopy(INodeFile currentINode) {
return new INodeFileAttributes.SnapshotCopy(currentINode);
}
}
/** @return the {@link INodeFile} view of this object. */
public INodeFile asINodeFile();
/** @return the file diff list. */
public FileDiffList getDiffs();
/** Is the current file deleted? */
public boolean isCurrentFileDeleted();
/** Delete the file from the current tree */
public void deleteCurrentFile();
/** Utility methods for the classes which implement the interface. */
public static class Util {
/**
* @return block replication, which is the max file replication among
* the file and the diff list.
*/
public static short getBlockReplication(final FileWithSnapshot file) {
short max = file.isCurrentFileDeleted()? 0
: file.asINodeFile().getFileReplication();
for(FileDiff d : file.getDiffs()) {
if (d.snapshotINode != null) {
final short replication = d.snapshotINode.getFileReplication();
if (replication > max) {
max = replication;
}
}
}
return max;
}
/**
* If some blocks at the end of the block list no longer belongs to
* any inode, collect them and update the block list.
*/
static void collectBlocksAndClear(final FileWithSnapshot file,
final BlocksMapUpdateInfo info, final List<INode> removedINodes) {
// check if everything is deleted.
if (file.isCurrentFileDeleted()
&& file.getDiffs().asList().isEmpty()) {
file.asINodeFile().destroyAndCollectBlocks(info, removedINodes);
return;
}
// find max file size.
final long max;
if (file.isCurrentFileDeleted()) {
final FileDiff last = file.getDiffs().getLast();
max = last == null? 0: last.fileSize;
} else {
max = file.asINodeFile().computeFileSize();
}
collectBlocksBeyondMax(file, max, info);
}
private static void collectBlocksBeyondMax(final FileWithSnapshot file,
final long max, final BlocksMapUpdateInfo collectedBlocks) {
final BlockInfo[] oldBlocks = file.asINodeFile().getBlocks();
if (oldBlocks != null) {
//find the minimum n such that the size of the first n blocks > max
int n = 0;
for(long size = 0; n < oldBlocks.length && max > size; n++) {
size += oldBlocks[n].getNumBytes();
}
// starting from block n, the data is beyond max.
if (n < oldBlocks.length) {
// resize the array.
final BlockInfo[] newBlocks;
if (n == 0) {
newBlocks = null;
} else {
newBlocks = new BlockInfo[n];
System.arraycopy(oldBlocks, 0, newBlocks, 0, n);
}
// set new blocks
file.asINodeFile().setBlocks(newBlocks);
// collect the blocks beyond max.
if (collectedBlocks != null) {
for(; n < oldBlocks.length; n++) {
collectedBlocks.addDeleteBlock(oldBlocks[n]);
}
}
}
}
}
}
}

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

@ -432,8 +432,8 @@ public class INodeDirectorySnapshottable extends INodeDirectoryWithSnapshot {
parentPath.remove(parentPath.size() - 1);
}
}
} else if (node.isFile() && node.asFile() instanceof FileWithSnapshot) {
FileWithSnapshot file = (FileWithSnapshot) node.asFile();
} else if (node.isFile() && node.asFile() instanceof INodeFileWithSnapshot) {
INodeFileWithSnapshot file = (INodeFileWithSnapshot) node.asFile();
Snapshot earlierSnapshot = diffReport.isFromEarlier() ? diffReport.from
: diffReport.to;
Snapshot laterSnapshot = diffReport.isFromEarlier() ? diffReport.to
@ -441,7 +441,7 @@ public class INodeDirectorySnapshottable extends INodeDirectoryWithSnapshot {
boolean change = file.getDiffs().changedBetweenSnapshots(earlierSnapshot,
laterSnapshot);
if (change) {
diffReport.addFileDiff(file.asINodeFile(), relativePath);
diffReport.addFileDiff(file, relativePath);
}
}
}

8
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/INodeDirectoryWithSnapshot.java
View File

@ -804,10 +804,10 @@ public class INodeDirectoryWithSnapshot extends INodeDirectory {
// For DstReference node, since the node is not in the created list of
// prior, we should treat it as regular file/dir
} else if (topNode.isFile()
&& topNode.asFile() instanceof FileWithSnapshot) {
FileWithSnapshot fs = (FileWithSnapshot) topNode.asFile();
counts.add(fs.getDiffs().deleteSnapshotDiff(post, prior,
topNode.asFile(), collectedBlocks, removedINodes, countDiffChange));
&& topNode.asFile() instanceof INodeFileWithSnapshot) {
INodeFileWithSnapshot fs = (INodeFileWithSnapshot) topNode.asFile();
counts.add(fs.getDiffs().deleteSnapshotDiff(post, prior, fs,
collectedBlocks, removedINodes, countDiffChange));
} else if (topNode.isDirectory()) {
INodeDirectory dir = topNode.asDirectory();
ChildrenDiff priorChildrenDiff = null;

117
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/INodeFileWithSnapshot.java
View File

@ -21,6 +21,7 @@ import java.util.List;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hdfs.protocol.QuotaExceededException;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.namenode.INode;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
import org.apache.hadoop.hdfs.server.namenode.INodeFileAttributes;
@ -31,14 +32,13 @@ import org.apache.hadoop.hdfs.server.namenode.Quota;
* Represent an {@link INodeFile} that is snapshotted.
*/
@InterfaceAudience.Private
public class INodeFileWithSnapshot extends INodeFile
implements FileWithSnapshot {
public class INodeFileWithSnapshot extends INodeFile {
private final FileDiffList diffs;
private boolean isCurrentFileDeleted = false;
public INodeFileWithSnapshot(INodeFile f) {
this(f, f instanceof FileWithSnapshot?
((FileWithSnapshot)f).getDiffs(): null);
this(f, f instanceof INodeFileWithSnapshot ?
((INodeFileWithSnapshot) f).getDiffs() : null);
}
public INodeFileWithSnapshot(INodeFile f, FileDiffList diffs) {
@ -46,12 +46,12 @@ public class INodeFileWithSnapshot extends INodeFile
this.diffs = diffs != null? diffs: new FileDiffList();
}
@Override
/** Is the current file deleted? */
public boolean isCurrentFileDeleted() {
return isCurrentFileDeleted;
}
@Override
/** Delete the file from the current tree */
public void deleteCurrentFile() {
isCurrentFileDeleted = true;
}
@ -70,12 +70,7 @@ public class INodeFileWithSnapshot extends INodeFile
return this;
}
@Override
public INodeFile asINodeFile() {
return this;
}
@Override
/** @return the file diff list. */
public FileDiffList getDiffs() {
return diffs;
}
@ -90,7 +85,7 @@ public class INodeFileWithSnapshot extends INodeFile
recordModification(prior, null);
deleteCurrentFile();
}
Util.collectBlocksAndClear(this, collectedBlocks, removedINodes);
this.collectBlocksAndClear(collectedBlocks, removedINodes);
return Quota.Counts.newInstance();
} else { // delete a snapshot
prior = getDiffs().updatePrior(snapshot, prior);
@ -104,4 +99,100 @@ public class INodeFileWithSnapshot extends INodeFile
return super.toDetailString()
+ (isCurrentFileDeleted()? "(DELETED), ": ", ") + diffs;
}
/**
* @return block replication, which is the max file replication among
* the file and the diff list.
*/
@Override
public short getBlockReplication() {
short max = isCurrentFileDeleted() ? 0 : getFileReplication();
for(FileDiff d : getDiffs()) {
if (d.snapshotINode != null) {
final short replication = d.snapshotINode.getFileReplication();
if (replication > max) {
max = replication;
}
}
}
return max;
}
/**
* If some blocks at the end of the block list no longer belongs to
* any inode, collect them and update the block list.
*/
void collectBlocksAndClear(final BlocksMapUpdateInfo info,
final List<INode> removedINodes) {
// check if everything is deleted.
if (isCurrentFileDeleted() && getDiffs().asList().isEmpty()) {
destroyAndCollectBlocks(info, removedINodes);
return;
}
// find max file size.
final long max;
if (isCurrentFileDeleted()) {
final FileDiff last = getDiffs().getLast();
max = last == null? 0: last.getFileSize();
} else {
max = computeFileSize();
}
collectBlocksBeyondMax(max, info);
}
private void collectBlocksBeyondMax(final long max,
final BlocksMapUpdateInfo collectedBlocks) {
final BlockInfo[] oldBlocks = getBlocks();
if (oldBlocks != null) {
//find the minimum n such that the size of the first n blocks > max
int n = 0;
for(long size = 0; n < oldBlocks.length && max > size; n++) {
size += oldBlocks[n].getNumBytes();
}
// starting from block n, the data is beyond max.
if (n < oldBlocks.length) {
// resize the array.
final BlockInfo[] newBlocks;
if (n == 0) {
newBlocks = null;
} else {
newBlocks = new BlockInfo[n];
System.arraycopy(oldBlocks, 0, newBlocks, 0, n);
}
// set new blocks
setBlocks(newBlocks);
// collect the blocks beyond max.
if (collectedBlocks != null) {
for(; n < oldBlocks.length; n++) {
collectedBlocks.addDeleteBlock(oldBlocks[n]);
}
}
}
}
}
Quota.Counts updateQuotaAndCollectBlocks(FileDiff removed,
BlocksMapUpdateInfo collectedBlocks, final List<INode> removedINodes) {
long oldDiskspace = this.diskspaceConsumed();
if (removed.snapshotINode != null) {
short replication = removed.snapshotINode.getFileReplication();
short currentRepl = getBlockReplication();
if (currentRepl == 0) {
oldDiskspace = computeFileSize(true, true) * replication;
} else if (replication > currentRepl) {
oldDiskspace = oldDiskspace / getBlockReplication()
* replication;
}
}
this.collectBlocksAndClear(collectedBlocks, removedINodes);
long dsDelta = oldDiskspace - diskspaceConsumed();
return Quota.Counts.newInstance(0, dsDelta);
}
}

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

@ -36,8 +36,6 @@ import org.apache.hadoop.hdfs.server.namenode.INodeDirectoryAttributes;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
import org.apache.hadoop.hdfs.server.namenode.INodeFileAttributes;
import org.apache.hadoop.hdfs.server.namenode.INodeReference;
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.tools.snapshot.SnapshotDiff;
@ -99,8 +97,8 @@ public class SnapshotFSImageFormat {
public static void saveFileDiffList(final INodeFile file,
final DataOutput out) throws IOException {
saveINodeDiffs(file instanceof FileWithSnapshot?
((FileWithSnapshot)file).getDiffs(): null, out, null);
saveINodeDiffs(file instanceof INodeFileWithSnapshot?
((INodeFileWithSnapshot) file).getDiffs(): null, out, null);
}
public static FileDiffList loadFileDiffList(DataInput in,

1
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestRenameWithSnapshots.java
View File

@ -63,7 +63,6 @@ import org.apache.hadoop.hdfs.server.namenode.INodeMap;
import org.apache.hadoop.hdfs.server.namenode.INodeReference;
import org.apache.hadoop.hdfs.server.namenode.INodeReference.WithCount;
import org.apache.hadoop.hdfs.server.namenode.Quota;
import org.apache.hadoop.hdfs.server.namenode.snapshot.FileWithSnapshot.FileDiff;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot.ChildrenDiff;
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectoryWithSnapshot.DirectoryDiff;
import org.apache.hadoop.hdfs.util.Diff.ListType;