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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2014/06/16 23:54:02 UTC

[jira] [Commented] (HBASE-11364) [BlockCache] Add a flag to cache data blocks in L1 if multi-tier cache

    [ https://issues.apache.org/jira/browse/HBASE-11364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14033053#comment-14033053 ] 

stack commented on HBASE-11364:
-------------------------------

For I while I considered an abstract notion such as 'priority' or 'hot' column family with how its implemented then done by hbase internally setting IN_MEMORY and CACHE_DATA_IN_L1 but put that aside as work for another day.  All configs are fairly specific currently, CACHE_ON_WRITE, IN_MEMORY, etc., with particular meanings.  Here I am following the mold for now.

> [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
>         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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