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https://issues.apache.org/jira/browse/HBASE-1278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Evgeny Ryabitskiy updated HBASE-1278:
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Attachment: HBASE-1278.patch
This path changes TreeMap to HashMap in HLog.java and HRegion.java. Because we
don't need sorting of edits before appending them to log and memcache. HashMap
is faster and regions servers will not waste time for unnecessary sorting.
> Improvement of HRegion rows update logic
> ----------------------------------------
>
> Key: HBASE-1278
> URL: https://issues.apache.org/jira/browse/HBASE-1278
> Project: Hadoop HBase
> Issue Type: Sub-task
> Components: regionserver
> Affects Versions: 0.20.0
> Reporter: Evgeny Ryabitskiy
> Assignee: Evgeny Ryabitskiy
> Fix For: 0.20.1
>
> Attachments: HBASE-1278.patch
>
>
> Log with my mentor :)
> [10:16] <EugeneR> update method in HRegion is using TreeMap as it's
> parameter...
> [10:17] <EugeneR> so... before run it.. we creating a TreeMap from our Set of
> changes
> [10:17] <EugeneR> and using comparator for sorting
> [10:17] <EugeneR> but!
> [10:17] <EugeneR> guess what update doing with TreeMap??? ))
> [10:18] <EugeneR> updatesByColumn.entrySet()... it gets back our Set of
> changes from that TreeMap!!! :)
> [10:19] <EugeneR> we are wrapping Set in TreeMap to put in method and then
> get it back in this method.... )
> [10:23] <EugeneR> St^Ack: So I know from what to start my improvement for
> GSoC task )))
> [10:23] <St^Ack> EugeneR: smile
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