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https://issues.apache.org/jira/browse/HBASE-685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12720738#action_12720738
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Erik Holstad commented on HBASE-685:
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To clarify what I meant say.
Yes, we don't use syncronized maps any more but a concurrentSkipList which help
with all the multi reading and writing.
But we do have a sorted structure still in memcache, but that should be the
only place where we actually need that structure.
> [Performance] Alternative to synchronized SortedMap
> ---------------------------------------------------
>
> Key: HBASE-685
> URL: https://issues.apache.org/jira/browse/HBASE-685
> Project: Hadoop HBase
> Issue Type: Improvement
> Reporter: stack
>
> Over in HBASE-684, LN suggests that we should find alternative to
> synchronized sortedmap; its used all over the place in hbase so a faster
> alternative should improve thoughput. That synchronized sortedmap is less
> than perfect has been known from earliest days (see cafarella comment at head
> of HStore#internalGet in 0.1 branch.
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