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https://issues.apache.org/jira/browse/CASSANDRA-3406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sylvain Lebresne updated CASSANDRA-3406:
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Attachment: (was: 3406.patch)
> Create a nodetool upgrade_sstables to avoid using scrubs for tasks it wasn't
> intended to.
> -----------------------------------------------------------------------------------------
>
> Key: CASSANDRA-3406
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3406
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Affects Versions: 1.0.0
> Reporter: Sylvain Lebresne
> Assignee: Sylvain Lebresne
> Priority: Trivial
> Fix For: 1.0.4
>
> Attachments: 0001-Refactor-to-avoid-code-duplication.patch,
> 0002-Add-upgradesstables-command.patch
>
>
> Scrub was intended to check a data file is not corrupted and to try to
> correct some form of corruption and discard the data when it can't repair.
> But we are now using it also for:
> * major upgrade, to have sstable in the new data format for streaming sake
> (that one could be "fixed" independently by supporting old format during
> streaming)
> * to force the compaction of existing sstables after changing the compression
> algorithm
> We should probably provide a separate tool/command for those two last tasks
> since:
> * we could have a better name, like upgrade_sstables or rewrite_sstables for
> that operation
> * we could avoid the automatic snapshot that scrub does (and is not expected
> by users for those operations)
> * make it slightly quicker/simpler by avoiding the corruption detection code
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