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From "Sylvain Lebresne (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2749) fine-grained control over data directories
Date Fri, 23 Dec 2011 14:42:31 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175447#comment-13175447
] 

Sylvain Lebresne commented on CASSANDRA-2749:
---------------------------------------------

Weird. I just tried the same scenario and everything worked correctly. I should mention that
when moving the snapshots/backups, the migration process rename them to the new filename convention,
so they will be called Keyspace1-Standard1.Idx-*. Or maybe I fixed it with the last version
of the patch without realizing it.
                
> 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: 0001-2749.patch, 0001-Make-it-possible-to-put-column-families-in-subdirect.patch,
0001-non-backwards-compatible-patch-for-2749-putting-cfs-.patch.gz, 0002-fix-unit-tests.patch,
0003-Fixes.patch, 2749.tar.gz, 2749_backwards_compatible_v1.patch, 2749_backwards_compatible_v2.patch,
2749_backwards_compatible_v3.patch, 2749_backwards_compatible_v4.patch, 2749_backwards_compatible_v4_rebase1.patch,
2749_not_backwards.tar.gz, 2749_proper.tar.gz
>
>
> 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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