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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-774) Optional flush provokes periodic large spike in cluster traffic
Date Fri, 25 Jul 2008 17:51:34 GMT

     [ https://issues.apache.org/jira/browse/HBASE-774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-774:
------------------------

    Attachment: network.gif

Picture of the spike in our cluster happening every half hour

> Optional flush provokes periodic large spike in cluster traffic
> ---------------------------------------------------------------
>
>                 Key: HBASE-774
>                 URL: https://issues.apache.org/jira/browse/HBASE-774
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>         Attachments: network.gif
>
>
> Looking at our 70-node cluster, whose current state is mostly read-only but for a service
that is trickling in pages at about 5/600 an hour, network traffic goes through the roof every
30 minutes.  This is 0.1.3.  Regionserver logs are silent but for the optional flush that
runs every 30 minutes.  The optional flush will put a few small files out on the filesystem
tripping compactions of small files.

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