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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-7006) [MTTR] Study distributed log splitting to see how we can make it faster
Date Tue, 23 Apr 2013 11:27:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13638964#comment-13638964
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Anoop Sam John edited comment on HBASE-7006 at 4/23/13 11:26 AM:
-----------------------------------------------------------------

The comparison numbers looks promising! So now we make the region available for writes immediately.
Have you run the test with clients doing the writes to region soon after it is opened for
write? (Impact on total recovery time) Going through the patch..
                
      was (Author: anoop.hbase):
    The comparison numbers looks promising! So now we make the region available for writes
immediately. Have you run the test with clients doing the writes to region soon after it is
opened for write? Going through the patch..
                  
> [MTTR] Study distributed log splitting to see how we can make it faster
> -----------------------------------------------------------------------
>
>                 Key: HBASE-7006
>                 URL: https://issues.apache.org/jira/browse/HBASE-7006
>             Project: HBase
>          Issue Type: Bug
>          Components: MTTR
>            Reporter: stack
>            Assignee: Jeffrey Zhong
>            Priority: Critical
>             Fix For: 0.95.1
>
>         Attachments: hbase-7006-combined.patch, LogSplitting Comparison.pdf, ProposaltoimprovelogsplittingprocessregardingtoHBASE-7006-v2.pdf
>
>
> Just saw interesting issue where a cluster went down  hard and 30 nodes had 1700 WALs
to replay.  Replay took almost an hour.  It looks like it could run faster that much of the
time is spent zk'ing and nn'ing.
> Putting in 0.96 so it gets a look at least.  Can always punt.

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