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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11696) Make CombinedBlockCache resizable.
Date Thu, 07 Aug 2014 17:34:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14089494#comment-14089494
] 

stack commented on HBASE-11696:
-------------------------------

On CBC, L1 is META blocks only.  I could imagine it running a while and then ergonomics asking
its usage is and then shrinking down the L1 so it was the size of the META block cache only.
 It could check back on occasion to see if evictions.  If so, size up the L1 until evictions
go to zero again.

This would be sweet.

> Make CombinedBlockCache resizable.
> ----------------------------------
>
>                 Key: HBASE-11696
>                 URL: https://issues.apache.org/jira/browse/HBASE-11696
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 2.0.0
>
>
> HBASE-5349 adds auto tuning of memstore heap and block cache heap. Block cache needs
to be resizable in order for this. CombinedBlockCache is not marked resizable now. We can
make this. On resize the L1 cache (ie. LRU cache) can get resized.



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