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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1238) Under upload, region servers are unable to compact when loaded with hundreds of regions
Date Wed, 04 Mar 2009 20:53:56 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jean-Daniel Cryans updated HBASE-1238:
--------------------------------------

    Attachment: hbase-1238.patch

I'm going to try if this helps our job.

> Under upload, region servers are unable to compact when loaded with hundreds of regions
> ---------------------------------------------------------------------------------------
>
>                 Key: HBASE-1238
>                 URL: https://issues.apache.org/jira/browse/HBASE-1238
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.19.0
>            Reporter: Jean-Daniel Cryans
>            Priority: Blocker
>             Fix For: 0.19.1, 0.20.0
>
>         Attachments: hbase-1238.patch
>
>
> We have a situation where each region server is loaded with 100+ regions, most of them
in the same table. During a long upload of webpages, each memcache gets filled near equally
fast so that the global memcache limit is usually triggered before the max memcache size.
Since that emergency flush does not trigger compactions, the number of store files just keeps
growing until it fails on all kinds of errors.
> We need a better story for this as this is a "normal" situation.

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