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https://issues.apache.org/jira/browse/HBASE-3322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969646#action_12969646
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Todd Lipcon commented on HBASE-3322:
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It's strange because I experienced significant speedup! Can we try YCSB for
easy comparison?
> HLog sync slowdown under heavy load with HBASE-2467
> ---------------------------------------------------
>
> Key: HBASE-3322
> URL: https://issues.apache.org/jira/browse/HBASE-3322
> Project: HBase
> Issue Type: Bug
> Components: io, regionserver
> Affects Versions: 0.90.0
> Reporter: Jonathan Gray
> Priority: Blocker
> Fix For: 0.90.0, 0.92.0
>
>
> Testing HBASE-2467 and HDFS-895 on 100 node cluster w/ a heavy increment
> workload we experienced significant slowdown.
> Stack traces show that most threads are on HLog.updateLock.
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