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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HBASE-774) Optional flush provokes periodic large spike in cluster traffic
Date Sat, 17 Jan 2009 23:08:59 GMT

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

stack resolved HBASE-774.

    Resolution: Invalid

We don't have optional flush any more so resolving invalid though we may see a different manifestation
when major compactions run once a day.

> 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
>            Priority: Critical
>         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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