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From "Pavel Yaskevich (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2749) fine-grained control over data directories
Date Thu, 13 Oct 2011 21:29:11 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126954#comment-13126954
] 

Pavel Yaskevich commented on CASSANDRA-2749:
--------------------------------------------

Good, can you briefly tell what is left? I see that ColumnFamilyStoreTest has an commented
assertion and code still have some TODOs. Also please make sure you follow your CodeStyle
and put space after if/for/while/... statements...
                
> fine-grained control over data directories
> ------------------------------------------
>
>                 Key: CASSANDRA-2749
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2749
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jonathan Ellis
>            Priority: Minor
>             Fix For: 1.1
>
>         Attachments: 0001-Make-it-possible-to-put-column-families-in-subdirect.patch,
2749_backwards_compatible_v1.patch, 2749_backwards_compatible_v2.patch
>
>
> Currently Cassandra supports multiple data directories but no way to control what sstables
are placed where. Particularly for systems with mixed SSDs and rotational disks, it would
be nice to pin frequently accessed columnfamilies to the SSDs.
> Postgresql does this with tablespaces (http://www.postgresql.org/docs/9.0/static/manage-ag-tablespaces.html)
but we should probably avoid using that name because of confusing similarity to "keyspaces."

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