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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5847) Consolidate INodeReference into a separate section
Date Thu, 13 Feb 2014 11:15:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13900225#comment-13900225
] 

Hudson commented on HDFS-5847:
------------------------------

SUCCESS: Integrated in Hadoop-Yarn-trunk #480 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/480/])
HDFS-5847. Consolidate INodeReference into a separate section. Contributed by Jing Zhao. (jing9:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1567812)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormatPBINode.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormatProtobuf.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/FSImageFormatPBSnapshot.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/LsrPBImage.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/PBImageXmlWriter.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/fsimage.proto


> Consolidate INodeReference into a separate section
> --------------------------------------------------
>
>                 Key: HDFS-5847
>                 URL: https://issues.apache.org/jira/browse/HDFS-5847
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: 3.0.0
>            Reporter: Haohui Mai
>            Assignee: Jing Zhao
>             Fix For: 3.0.0
>
>         Attachments: HDFS-5847.000.patch, HDFS-5847.001.patch, HDFS-5847.002.patch
>
>
> Currently each INodeDirectorySection.Entry contains variable numbers of INodeReference
entries. The INodeReference entries are inlined, therefore it is difficult to quickly navigate
through a INodeDirectorySection.Entry. Skipping through a INodeDirectorySection.Entry without
parsing is essential to parse these entries in parallel.
> This jira proposes to consolidate INodeReferences into a section and give each of them
an ID. The INodeDirectorySection.Entry can store the list of the IDs as a repeated field.
That way we can leverage the existing code in protobuf to quickly skip through a INodeDirectorySection.Entry.



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