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Posted to issues@hbase.apache.org by "Nicolas Spiegelberg (Commented) (JIRA)" <ji...@apache.org> on 2011/11/15 01:59:53 UTC

[jira] [Commented] (HBASE-4785) Improve recovery time of HBase client when a region server dies.

    [ https://issues.apache.org/jira/browse/HBASE-4785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150133#comment-13150133 ] 

Nicolas Spiegelberg commented on HBASE-4785:
--------------------------------------------

Part of 89-fb to trunk port.  See r1181949.
                
> 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
>
>
> 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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