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https://issues.apache.org/jira/browse/HBASE-20564?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang updated HBASE-20564:
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Fix Version/s: 2.1.0
3.0.0-alpha-1
> Tighter ByteBufferKeyValue Cell Comparator
> ------------------------------------------
>
> Key: HBASE-20564
> URL: https://issues.apache.org/jira/browse/HBASE-20564
> Project: HBase
> Issue Type: Sub-task
> Components: Performance
> Reporter: Michael Stack
> Assignee: Michael Stack
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.1.0, 2.0.1
>
> Attachments: 0001-HBASE-20564-addendum.txt,
> 0001-HBASE-20564-addendum.txt, 0001-HBASE-20564-addendum2.branch-2.0.patch,
> 0002-HBASE-20564-addendum.branch-2.0.patch, 1.4.pe.write.0510.96203.cpu.svg,
> 2.p3.write2.0514.104236.cpu.svg, 2.pe.write.135142.cpu.svg, 20564.addendum,
> HBASE-20564.branch-2.0.001.patch, HBASE-20564.branch-2.0.002.patch,
> HBASE-20564.branch-2.patch, hits.png
>
>
> Comparing Cells in hbase2 takes almost 3x the CPU.
> In hbase1, its a keyValue backed by a byte array caching a few important
> values.. In hbase2, its a NoTagByteBufferChunkKeyValue(?) deserializing the
> row/family/qualifier lengths repeatedly.
> I tried making a purposed comparator -- one that was not generic -- and it
> seemed to have a nicer profile coming close to hbase1 in percentage used
> (I'll post graphs) when I ran it in my perpetual memstore filler (See scripts
> attached to HBASE-20483). It doesn't work when I try to run it on cluster.
> Let me run unit tests to see if it can figure what I have wrong.
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