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https://issues.apache.org/jira/browse/CASSANDRA-2749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175390#comment-13175390
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Pavel Yaskevich commented on CASSANDRA-2749:
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bq. I'm not sure I see what this one is. Are we talking of the migration
process?
I was testing it like this :
# run 1.1 *without* modifications
# ./tools/stress/bin/stress -n 50000 -S 512 -x KEYS
# ./bin/nodetool -h localhost flush Keyspace1 Standard1
# ./bin/nodetool -h localhost snapshot Keyspace1
# made sure that Standard1.Idx-* SSTables are in the snapshots/<timestamp>
directory
# run 1.1 *with* you patch applied
# checked if snapshots directory was moved and what files did it include -
it was lucking Standard1.Idx-* files
# cleaned data directory
# repeated steps 1 - 5 but this time *with* your patch applied and it
didn't include Standard1.Idx-* into snapshot
bq. Maybe it is more "natural" to have secondary indexes sstables be in the
same directory than the base cfs?
+1
> 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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