[
https://issues.apache.org/jira/browse/CASSANDRA-2749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13146250#comment-13146250
]
Pavel Yaskevich commented on CASSANDRA-2749:
--------------------------------------------
Tested v4 on trunk and I see few test failures - LegacySSTableTest and
ColumnFamilyStoreTest, it is related to how you determine what placement style
is used for a given SSTable, feels like
!DatabaseDescriptor.useSeparateCFDirectories() condition is insufficient. Also
I think it would be correct to rename "one_directory_per_column_family" option
to "use_separate_column_family_directories" with comment like "Useful when you
have disks with different speeds (HDD/SSD) and you want explicitly distribute
Column Families between them".
> 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
> Assignee: Marcus Eriksson
> 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,
> 2749_backwards_compatible_v3.patch, 2749_backwards_compatible_v4.patch,
> 2749_backwards_compatible_v4_rebase1.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."
--
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
