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HDFS-6838. Code cleanup for unnecessary INode replacement. Contributed by Jing Zhao. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617361 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Haohui Mai 2014-08-11 21:28:33 +00:00
parent c4dc685343
commit 80691b073f
9 changed files with 46 additions and 57 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -390,6 +390,9 @@ Release 2.6.0 - UNRELEASED
HDFS-6837. Code cleanup for Balancer and Dispatcher. (szetszwo via
jing9)
HDFS-6838. Code cleanup for unnecessary INode replacement.
(Jing Zhao via wheat9)
OPTIMIZATIONS
HDFS-6690. Deduplicate xattr names in memory. (wang)

12
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
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@ -764,8 +764,6 @@ public class FSDirectory implements Closeable {
checkSnapshot(srcInode, null);
}
private class RenameOperation {
private final INodesInPath srcIIP;
private final INodesInPath dstIIP;
@ -798,7 +796,7 @@ public class FSDirectory implements Closeable {
// snapshot is taken on the dst tree, changes will be recorded in the latest
// snapshot of the src tree.
if (isSrcInSnapshot) {
srcChild = srcChild.recordModification(srcIIP.getLatestSnapshotId());
srcChild.recordModification(srcIIP.getLatestSnapshotId());
}
// check srcChild for reference
@ -928,8 +926,7 @@ public class FSDirectory implements Closeable {
updateCount(iip, 0, dsDelta, true);
}
file = file.setFileReplication(replication, iip.getLatestSnapshotId(),
inodeMap);
file.setFileReplication(replication, iip.getLatestSnapshotId());
final short newBR = file.getBlockReplication();
// check newBR < oldBR case.
@ -1212,8 +1209,7 @@ public class FSDirectory implements Closeable {
// record modification
final int latestSnapshot = iip.getLatestSnapshotId();
targetNode = targetNode.recordModification(latestSnapshot);
iip.setLastINode(targetNode);
targetNode.recordModification(latestSnapshot);
// Remove the node from the namespace
long removed = removeLastINode(iip);
@ -2122,7 +2118,7 @@ public class FSDirectory implements Closeable {
}
final int latest = iip.getLatestSnapshotId();
dirNode = dirNode.recordModification(latest);
dirNode.recordModification(latest);
dirNode.setQuota(nsQuota, dsQuota);
return dirNode;
}

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -2516,7 +2516,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
boolean writeToEditLog,
int latestSnapshot, boolean logRetryCache)
throws IOException {
file = file.recordModification(latestSnapshot);
file.recordModification(latestSnapshot);
final INodeFile cons = file.toUnderConstruction(leaseHolder, clientMachine);
leaseManager.addLease(cons.getFileUnderConstructionFeature()
@ -4211,7 +4211,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
Preconditions.checkArgument(uc != null);
leaseManager.removeLease(uc.getClientName(), src);
pendingFile = pendingFile.recordModification(latestSnapshot);
pendingFile.recordModification(latestSnapshot);
// The file is no longer pending.
// Create permanent INode, update blocks. No need to replace the inode here

59
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INode.java
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@ -97,9 +97,9 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
/** Set user */
final INode setUser(String user, int latestSnapshotId)
throws QuotaExceededException {
final INode nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.setUser(user);
return nodeToUpdate;
recordModification(latestSnapshotId);
setUser(user);
return this;
}
/**
* @param snapshotId
@ -122,9 +122,9 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
/** Set group */
final INode setGroup(String group, int latestSnapshotId)
throws QuotaExceededException {
final INode nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.setGroup(group);
return nodeToUpdate;
recordModification(latestSnapshotId);
setGroup(group);
return this;
}
/**
@ -148,9 +148,9 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
/** Set the {@link FsPermission} of this {@link INode} */
INode setPermission(FsPermission permission, int latestSnapshotId)
throws QuotaExceededException {
final INode nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.setPermission(permission);
return nodeToUpdate;
recordModification(latestSnapshotId);
setPermission(permission);
return this;
}
abstract AclFeature getAclFeature(int snapshotId);
@ -164,18 +164,18 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
final INode addAclFeature(AclFeature aclFeature, int latestSnapshotId)
throws QuotaExceededException {
final INode nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.addAclFeature(aclFeature);
return nodeToUpdate;
recordModification(latestSnapshotId);
addAclFeature(aclFeature);
return this;
}
abstract void removeAclFeature();
final INode removeAclFeature(int latestSnapshotId)
throws QuotaExceededException {
final INode nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.removeAclFeature();
return nodeToUpdate;
recordModification(latestSnapshotId);
removeAclFeature();
return this;
}
/**
@ -199,9 +199,9 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
final INode addXAttrFeature(XAttrFeature xAttrFeature, int latestSnapshotId)
throws QuotaExceededException {
final INode nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.addXAttrFeature(xAttrFeature);
return nodeToUpdate;
recordModification(latestSnapshotId);
addXAttrFeature(xAttrFeature);
return this;
}
/**
@ -211,9 +211,9 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
final INode removeXAttrFeature(int lastestSnapshotId)
throws QuotaExceededException {
final INode nodeToUpdate = recordModification(lastestSnapshotId);
nodeToUpdate.removeXAttrFeature();
return nodeToUpdate;
recordModification(lastestSnapshotId);
removeXAttrFeature();
return this;
}
/**
@ -298,11 +298,8 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
* @param latestSnapshotId The id of the latest snapshot that has been taken.
* Note that it is {@link Snapshot#CURRENT_STATE_ID}
* if no snapshots have been taken.
* @return The current inode, which usually is the same object of this inode.
* However, in some cases, this inode may be replaced with a new inode
* for maintaining snapshots. The current inode is then the new inode.
*/
abstract INode recordModification(final int latestSnapshotId)
abstract void recordModification(final int latestSnapshotId)
throws QuotaExceededException;
/** Check whether it's a reference. */
@ -652,9 +649,9 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
/** Set the last modification time of inode. */
public final INode setModificationTime(long modificationTime,
int latestSnapshotId) throws QuotaExceededException {
final INode nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.setModificationTime(modificationTime);
return nodeToUpdate;
recordModification(latestSnapshotId);
setModificationTime(modificationTime);
return this;
}
/**
@ -682,9 +679,9 @@ public abstract class INode implements INodeAttributes, Diff.Element<byte[]> {
*/
public final INode setAccessTime(long accessTime, int latestSnapshotId)
throws QuotaExceededException {
final INode nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.setAccessTime(accessTime);
return nodeToUpdate;
recordModification(latestSnapshotId);
setAccessTime(accessTime);
return this;
}

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeDirectory.java
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@ -318,7 +318,7 @@ public class INodeDirectory extends INodeWithAdditionalFields
}
@Override
public INodeDirectory recordModification(int latestSnapshotId)
public void recordModification(int latestSnapshotId)
throws QuotaExceededException {
if (isInLatestSnapshot(latestSnapshotId)
&& !shouldRecordInSrcSnapshot(latestSnapshotId)) {
@ -330,7 +330,6 @@ public class INodeDirectory extends INodeWithAdditionalFields
// record self in the diff list if necessary
sf.getDiffs().saveSelf2Snapshot(latestSnapshotId, this, null);
}
return this;
}
/**

12
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFile.java
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@ -284,7 +284,7 @@ public class INodeFile extends INodeWithAdditionalFields
}
@Override
public INodeFile recordModification(final int latestSnapshotId)
public void recordModification(final int latestSnapshotId)
throws QuotaExceededException {
if (isInLatestSnapshot(latestSnapshotId)
&& !shouldRecordInSrcSnapshot(latestSnapshotId)) {
@ -296,7 +296,6 @@ public class INodeFile extends INodeWithAdditionalFields
// record self in the diff list if necessary
sf.getDiffs().saveSelf2Snapshot(latestSnapshotId, this, null);
}
return this;
}
public FileDiffList getDiffs() {
@ -344,11 +343,10 @@ public class INodeFile extends INodeWithAdditionalFields
/** Set the replication factor of this file. */
public final INodeFile setFileReplication(short replication,
int latestSnapshotId, final INodeMap inodeMap)
throws QuotaExceededException {
final INodeFile nodeToUpdate = recordModification(latestSnapshotId);
nodeToUpdate.setFileReplication(replication);
return nodeToUpdate;
int latestSnapshotId) throws QuotaExceededException {
recordModification(latestSnapshotId);
setFileReplication(replication);
return this;
}
/** @return preferred block size (in bytes) of the file. */

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeMap.java
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@ -93,9 +93,8 @@ public class INodeMap {
"", "", new FsPermission((short) 0)), 0, 0) {
@Override
INode recordModification(int latestSnapshotId)
void recordModification(int latestSnapshotId)
throws QuotaExceededException {
return null;
}
@Override

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeReference.java
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@ -287,11 +287,9 @@ public abstract class INodeReference extends INode {
}
@Override
final INode recordModification(int latestSnapshotId)
final void recordModification(int latestSnapshotId)
throws QuotaExceededException {
referred.recordModification(latestSnapshotId);
// reference is never replaced
return this;
}
@Override // used by WithCount

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeSymlink.java
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@ -47,12 +47,11 @@ public class INodeSymlink extends INodeWithAdditionalFields {
}
@Override
INode recordModification(int latestSnapshotId) throws QuotaExceededException {
void recordModification(int latestSnapshotId) throws QuotaExceededException {
if (isInLatestSnapshot(latestSnapshotId)) {
INodeDirectory parent = getParent();
parent.saveChild2Snapshot(this, latestSnapshotId, new INodeSymlink(this));
}
return this;
}
/** @return true unconditionally. */