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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7006) [MTTR] Improve Region Server Recovery Time - Distributed Log Replay
Date Fri, 17 May 2013 16:55:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13660851#comment-13660851
] 

Ted Yu commented on HBASE-7006:
-------------------------------

I created HBASE-8573 for storing last flushed sequence id for each store of region in zookeeper.
                
> [MTTR] Improve Region Server Recovery Time - Distributed Log Replay
> -------------------------------------------------------------------
>
>                 Key: HBASE-7006
>                 URL: https://issues.apache.org/jira/browse/HBASE-7006
>             Project: HBase
>          Issue Type: New Feature
>          Components: MTTR
>            Reporter: stack
>            Assignee: Jeffrey Zhong
>            Priority: Critical
>             Fix For: 0.98.0, 0.95.1
>
>         Attachments: hbase-7006-addendum.patch, hbase-7006-combined.patch, hbase-7006-combined-v1.patch,
hbase-7006-combined-v4.patch, hbase-7006-combined-v5.patch, hbase-7006-combined-v6.patch,
hbase-7006-combined-v7.patch, hbase-7006-combined-v8.patch, hbase-7006-combined-v9.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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