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Posted to issues@hbase.apache.org by "Jason Rutherglen (JIRA)" <ji...@apache.org> on 2011/06/15 22:12:47 UTC
[jira] [Created] (HBASE-3993) Alternatives to ConcurrentSkipListMap
in MemStore
Alternatives to ConcurrentSkipListMap in MemStore
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Key: HBASE-3993
URL: https://issues.apache.org/jira/browse/HBASE-3993
Project: HBase
Issue Type: Improvement
Reporter: Jason Rutherglen
Priority: Minor
This can be an umbrella issue for evaluating and testing alternatives to java.util.concurrent.ConcurrentSkipListMap in MemStore.
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[jira] [Commented] (HBASE-3993) Alternatives to
ConcurrentSkipListMap in MemStore
Posted by "stack (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-3993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13050703#comment-13050703 ]
stack commented on HBASE-3993:
------------------------------
@Jason I think main reason folks have talked of an alternative to CSLM is because it gets dog slow when well loaded (though recent Dhruba patch helps some here changing the way we access it).
> Alternatives to ConcurrentSkipListMap in MemStore
> -------------------------------------------------
>
> Key: HBASE-3993
> URL: https://issues.apache.org/jira/browse/HBASE-3993
> Project: HBase
> Issue Type: Improvement
> Reporter: Jason Rutherglen
> Priority: Minor
>
> This can be an umbrella issue for evaluating and testing alternatives to java.util.concurrent.ConcurrentSkipListMap in MemStore.
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This message is automatically generated by JIRA.
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[jira] [Commented] (HBASE-3993) Alternatives to
ConcurrentSkipListMap in MemStore
Posted by "Jason Rutherglen (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-3993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13049996#comment-13049996 ]
Jason Rutherglen commented on HBASE-3993:
-----------------------------------------
CSLM implements deletes, which we don't need, and consumes many object pointers which increases RAM consumption and can cause GC havoc.
> Alternatives to ConcurrentSkipListMap in MemStore
> -------------------------------------------------
>
> Key: HBASE-3993
> URL: https://issues.apache.org/jira/browse/HBASE-3993
> Project: HBase
> Issue Type: Improvement
> Reporter: Jason Rutherglen
> Priority: Minor
>
> This can be an umbrella issue for evaluating and testing alternatives to java.util.concurrent.ConcurrentSkipListMap in MemStore.
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This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira