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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11364) [BlockCache] Add a flag to cache data blocks in L1 if multi-tier cache
Date Wed, 18 Jun 2014 22:12:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14036507#comment-14036507
] 

Lars Hofhansl commented on HBASE-11364:
---------------------------------------

Belated +1

So this implies that storage will be L2 by default and L1 is opt in?
In the interested of the least surprise we might want to reverse that...?

> [BlockCache] Add a flag to cache data blocks in L1 if multi-tier cache
> ----------------------------------------------------------------------
>
>                 Key: HBASE-11364
>                 URL: https://issues.apache.org/jira/browse/HBASE-11364
>             Project: HBase
>          Issue Type: Task
>            Reporter: stack
>            Assignee: stack
>             Fix For: 0.99.0
>
>         Attachments: 11364.txt
>
>
> This is a prerequisite for HBASE-11323 BucketCache on all the time.  It addresses a @lars
hofhansl ask that we be able to ask that for some column families, even their data blocks
get cached up in the LruBlockCache L1 tier in a multi-tier deploy as happens when doing BucketCache
(CombinedBlockCache) setups.



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