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From "Marcus Eriksson (Updated) (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-2749) fine-grained control over data directories
Date Thu, 17 Nov 2011 13:48:54 GMT


Marcus Eriksson updated CASSANDRA-2749:

    Attachment: 0001-non-backwards-compatible-patch-for-2749-putting-cfs-.patch.gz

ok, actually touched it again, a non-backwards compatible patch with a tool to move(copy)
the files into subdirs

script is in tools/sstablemover
> fine-grained control over data directories
> ------------------------------------------
>                 Key: CASSANDRA-2749
>                 URL:
>             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,
0001-non-backwards-compatible-patch-for-2749-putting-cfs-.patch.gz, 2749.tar.gz, 2749_backwards_compatible_v1.patch,
2749_backwards_compatible_v2.patch, 2749_backwards_compatible_v3.patch, 2749_backwards_compatible_v4.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 (
but we should probably avoid using that name because of confusing similarity to "keyspaces."

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