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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11696) Make CombinedBlockCache resizable.
Date Thu, 07 Aug 2014 18:00:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14089529#comment-14089529
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Anoop Sam John commented on HBASE-11696:
----------------------------------------

bq.On CBC, L1 is META blocks only.
META alone? We have HCD#setCacheDataInL1(boolean value) right?  Not gone through the entire
code flow of that. Correct me if I wrong.

bq. 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.
Ya  the tuner framework will do this work.


> 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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