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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3620) Make HBCK Faster
Date Sun, 13 Mar 2011 04:46:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13006142#comment-13006142
] 

Ted Yu commented on HBASE-3620:
-------------------------------

I was comparing the code from HTable:
{code}
    this.pool = new ThreadPoolExecutor(nrThreads, nrThreads,
        60, TimeUnit.SECONDS,
        new LinkedBlockingQueue<Runnable>(),
        new DaemonThreadFactory());
    ((ThreadPoolExecutor)this.pool).allowCoreThreadTimeOut(true);
{code}
with the code in hbck:
{code}
    executor = new ThreadPoolExecutor(0, numThreads,
          THREADS_KEEP_ALIVE_SECONDS, TimeUnit.SECONDS,
          new LinkedBlockingQueue<Runnable>());
{code}
I think the above code matches Himanshu Vashishtha's description in HBASE-3553
Hence the reason for my first comment.

> Make HBCK Faster
> ----------------
>
>                 Key: HBASE-3620
>                 URL: https://issues.apache.org/jira/browse/HBASE-3620
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Nicolas Spiegelberg
>            Assignee: Nicolas Spiegelberg
>            Priority: Minor
>             Fix For: 0.90.2, 0.92.0
>
>         Attachments: hbck_perf.patch
>
>
> Make the HBCK utility contact all region servers & HDFS directories in parallel.
This will speedup hbck processing, especially when there are lots of region servers.

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