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From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7006) [MTTR] Study distributed log splitting to see how we can make it faster
Date Tue, 12 Feb 2013 17:49:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13576821#comment-13576821
] 

Jeffrey Zhong commented on HBASE-7006:
--------------------------------------

@Ted,

Yes, my first patch will include major logic for this JIRA and will be attached to a sub task
JIRA(to be created) and be submitted within these two days. There will be two more sub JIRAs:
one is to create a replay command and the other is to add metrics for better reporting purpose.

Thanks,
-Jeffrey 
                
> [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
>            Reporter: stack
>            Assignee: Jeffrey Zhong
>             Fix For: 0.96.0
>
>         Attachments: LogSplitting Comparison.pdf, ProposaltoimprovelogsplittingprocessregardingtoHBASE-7006.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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