[jira] Commented: (HADOOP-3369) Fast block processing during name-node startup.

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

    [ https://issues.apache.org/jira/browse/HADOOP-3369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595501#action_12595501 ] 

Hadoop QA commented on HADOOP-3369:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12381727/fastBlockReports.patch
  against trunk revision 654315.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2436/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2436/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2436/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2436/console

This message is automatically generated.

> Fast block processing during name-node startup.
> -----------------------------------------------
>
>                 Key: HADOOP-3369
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3369
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.17.0
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>             Fix For: 0.18.0
>
>         Attachments: fastBlockReports.patch
>
>
> The block report processing during the startup period should be optimized.
> As noted in HADOOP-3022 during cluster startup all blocks are under-replicated 
> because they have not been reported by name-nodes yet.
> Currently, we routinely move blocks to the neededReplications queue when they
> are first reported and then remove them from the list when other nodes report it.
> In ideal situation we end up adding all blocks into neededReplications queue first
> only in order to remove all of them in the end. 

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