[
https://issues.apache.org/jira/browse/CASSANDRA-2749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163571#comment-13163571
]
Sylvain Lebresne commented on CASSANDRA-2749:
---------------------------------------------
bq. i had on algorithm for detecting what kind of file it is in the old
backwards compatible patch, it iterates over all data directories and figures
out which data directory the file is in, then it knows the keyspace is the next
part of the filename, and can check if there are files or directories in that
directory.
I tried that too, but this doesn't work when say you're opening a sstable by
the sstableloader, because the files are not in a data directories then.
> 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,
> 0001-add-new-directory-layout.patch,
> 0001-non-backwards-compatible-patch-for-2749-putting-cfs-.patch.gz,
> 0002-fix-unit-tests.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."
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
