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