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From "Ted Yu (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4785) Improve recovery time of HBase client when a region server dies.
Date Wed, 23 Nov 2011 19:25:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156207#comment-13156207
] 

Ted Yu commented on HBASE-4785:
-------------------------------

+1 on patch v2.
                
> Improve recovery time of HBase client when a region server dies.
> ----------------------------------------------------------------
>
>                 Key: HBASE-4785
>                 URL: https://issues.apache.org/jira/browse/HBASE-4785
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Nicolas Spiegelberg
>            Assignee: Nicolas Spiegelberg
>            Priority: Minor
>             Fix For: 0.94.0
>
>         Attachments: HBASE-4785.patch, HBASE-4785.patch
>
>
> When a region server dies, the HBase client waits until the RPC timesout before learning
that it needs to check META to find the new location of the region. And it incurs this *timeout*
cost for every region being served by the dead region server. Remove this overhead by clearing
the entries in cache that have the dead region server as their values.

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