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https://issues.apache.org/jira/browse/HBASE-774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12621970#action_12621970
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stack commented on HBASE-774:
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Wikia folks are seeing this pheomeon in their 0.1.3 cluster.
> 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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