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https://issues.apache.org/jira/browse/HBASE-11581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14090774#comment-14090774
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stack commented on HBASE-11581:
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[~talat] What you think of this one sir?
> Add option so CombinedBlockCache L2 can be null (fscache)
> ---------------------------------------------------------
>
> Key: HBASE-11581
> URL: https://issues.apache.org/jira/browse/HBASE-11581
> Project: HBase
> Issue Type: New Feature
> Components: BlockCache
> Reporter: stack
> Assignee: stack
> Priority: Minor
> Labels: beginner, beginners
> Attachments: 11581.txt
>
>
> Add option, mostly for comparison's sake, that allows a deploy orchestrated
> by CombinedBlockCache such that its L1 is LruBlockCache for META blocks but
> DATA blocks are fetched each time (we don't try and cache them, no blockcache
> churn).
> In operation, i can see fscache coming around to cover the fetched DATA
> blocks such that if the DATA blocks fit in fscache, seeks go to zero.
> This setup for sure runs slower. Will publish numbers elsewhere. Meantime,
> here is a patch to enable this option.
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