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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2972) HA: small optimization building incremental block report
Date Thu, 23 Feb 2012 12:55:49 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214602#comment-13214602
] 

Hudson commented on HDFS-2972:
------------------------------

Integrated in Hadoop-Hdfs-HAbranch-build #86 (See [https://builds.apache.org/job/Hadoop-Hdfs-HAbranch-build/86/])
    HDFS-2972. Small optimization building incremental block report. Contributed by Todd Lipcon.
(Revision 1292497)

     Result = UNSTABLE
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1292497
Files : 
* /hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/CHANGES.HDFS-1623.txt
* /hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java

                
> HA: small optimization building incremental block report
> --------------------------------------------------------
>
>                 Key: HDFS-2972
>                 URL: https://issues.apache.org/jira/browse/HDFS-2972
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node, ha
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: HA branch (HDFS-1623)
>
>         Attachments: hdfs-2972.txt
>
>
> Current the incremental block report is a List. However, we only really need to send
the most recent information for each block. So, if a block becomes RBW and is then becomes
FINALIZED before the next incremental block report, we should just report the FINALIZED replica.
It's an easy change to just switch to a map by blockid.
> This is on the HA branch since HA changes the code to send RBWs in the incremental reports,
hence it's more important for maintaining performance parity with trunk.

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