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Date: Mon, 10 Aug 2015 17:15:46 +0000 (UTC)
From: "Nick Dimiduk (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-14189) BlockCache options should consider
 CF Level BlockCacheEnabled setting
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    [ https://issues.apache.org/jira/browse/HBASE-14189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14680386#comment-14680386 ] 

Nick Dimiduk commented on HBASE-14189:
--------------------------------------

bq. they are useless for the whole RS cache setting

Hi [~chenheng]. The current layered approach is the way it is because we get global controls with local overrides. For instance, when I have as much memory as I expect to have data, cacheonwrite makes sense as a global setting. Can you elaborate on the above? It's an opinion, not really much reasoning to convince the rest of us.

> BlockCache options should consider CF Level BlockCacheEnabled setting
> ---------------------------------------------------------------------
>
>                 Key: HBASE-14189
>                 URL: https://issues.apache.org/jira/browse/HBASE-14189
>             Project: HBase
>          Issue Type: Improvement
>          Components: BlockCache
>    Affects Versions: 2.0.0
>            Reporter: Heng Chen
>            Assignee: Heng Chen
>         Attachments: HBASE-14189.patch
>
>
> While using BlockCache,  we use {{cacheDataOnRead}}({{cacheDataOnWrite}}) represents for whether we should cache block after read(write) block from(to) hdfs.  We should honour BC setting and CF Level cache setting while using BlockCache.


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