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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2718) Optimize OP_ADD in edits loading
Date Fri, 03 Feb 2012 00:28:54 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199405#comment-13199405
] 

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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