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Date: Tue, 23 Oct 2012 12:45:11 +0000 (UTC)
From: "Brandon Williams (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Commented] (CASSANDRA-4694) populate_io_cache_on_flush
 option should be configurable for each column family independently
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    [ https://issues.apache.org/jira/browse/CASSANDRA-4694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482292#comment-13482292 ] 

Brandon Williams commented on CASSANDRA-4694:
---------------------------------------------

This looks good, but, if we're making it a 1.2 feature then it seems like we should have a way to control it from cql3 too.  We could do that in a different ticket, though.
                
> populate_io_cache_on_flush option should be configurable for each column family independently
> ---------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4694
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4694
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Alexey Zotov
>            Assignee: Alexey Zotov
>            Priority: Minor
>              Labels: cli, core, documentation
>             Fix For: 1.2.0
>
>         Attachments: cassandra-1.1-4694-populate_io_cache.txt, cassandra-1.2-4694-populate_io_cache.txt, cassandra-1.2-4694-populate_io_cache_v2.txt
>
>
> I suggest to configure populate_io_cache_on_flush option for each column family. It should be configurable from cassandra-cli and should be stored in System keyspace. 
> That could be useful if you have a few column families inside single keyspace and you need to fit in memory only one of them.
> Patch has been attached. I've been testing it on pseudo-cluster using ccm. So I don't have fully confidence about lack of bugs. Please carefully review that code.

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