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https://issues.apache.org/jira/browse/HDFS-2718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199405#comment-13199405
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Hudson commented on HDFS-2718:
------------------------------
Integrated in Hadoop-Hdfs-22-branch #125 (See
[https://builds.apache.org/job/Hadoop-Hdfs-22-branch/125/])
HDFS-2718. Optimize OP_ADD in edits loading. Contributed by Konstantin
Shvachko.
shv : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1239762
Files :
* /hadoop/common/branches/branch-0.22/hdfs/CHANGES.txt
*
/hadoop/common/branches/branch-0.22/hdfs/src/java/org/apache/hadoop/hdfs/server/namenode/BlockInfoUnderConstruction.java
*
/hadoop/common/branches/branch-0.22/hdfs/src/java/org/apache/hadoop/hdfs/server/namenode/BlockManager.java
*
/hadoop/common/branches/branch-0.22/hdfs/src/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
*
/hadoop/common/branches/branch-0.22/hdfs/src/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java
*
/hadoop/common/branches/branch-0.22/hdfs/src/java/org/apache/hadoop/hdfs/server/namenode/INodeFileUnderConstruction.java
*
/hadoop/common/branches/branch-0.22/hdfs/src/test/hdfs/org/apache/hadoop/hdfs/TestAbandonBlock.java
*
/hadoop/common/branches/branch-0.22/hdfs/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestEditLog.java
> Optimize OP_ADD in edits loading
> --------------------------------
>
> Key: HDFS-2718
> URL: https://issues.apache.org/jira/browse/HDFS-2718
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.22.0, 0.24.0, 1.0.0
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Fix For: 0.24.0, 0.23.1, 0.22.1
>
> Attachments: editsLoader-0.22.patch, editsLoader-0.22.patch,
> editsLoader-0.22.patch, editsLoader-trunk.patch, editsLoader-trunk.patch,
> editsLoader-trunk.patch, editsLoader-trunk.patch
>
>
> During loading the edits journal FSEditLog.loadEditRecords() processes OP_ADD
> inefficiently. It first removes the existing INodeFile from the directory
> tree, then adds it back as a regular INodeFile, and then replaces it with
> INodeFileUnderConstruction if files is not closed. This slows down edits
> loading. OP_ADD should be done in one shot and retain previously existing
> data.
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