[jira] Commented: (HDFS-736) commitBlockSynchronization() should directly update block GS and length.

["Hudson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12775221#action_12775221 ] 

Hudson commented on HDFS-736:
-----------------------------

Integrated in Hdfs-Patch-h5.grid.sp2.yahoo.net #100 (See [http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/100/])
    

> commitBlockSynchronization() should directly update block GS and length.
> ------------------------------------------------------------------------
>
>                 Key: HDFS-736
>                 URL: https://issues.apache.org/jira/browse/HDFS-736
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.21.0
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>             Fix For: 0.21.0
>
>         Attachments: commitBlockSync.patch
>
>
> {{FSNamesystem.commitBlockSynchronization()}} updates block's generation stamp and length by first removing the old block instance from blocksMap and then inserting the new instance back. This was necessary when GS was a part of the block key. After HDFS-512 the GS along with the block length can be updated directly in the blocksMap entry.

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