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From "Kurt Greaves (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-11324) Make SSTABLESCRUB and related jobs multi-threaded / parallelize somehow
Date Mon, 17 Oct 2016 22:51:58 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15583755#comment-15583755
] 

Kurt Greaves commented on CASSANDRA-11324:
------------------------------------------

[~iamaleksey] There was another question on mailing list regarding this. just wondering what
you mean by multiple scrub processes processing one sstable each? is this possible on a single
CF? I know it's possible to run one offline scrub for each CF however as Thom mentioned I
couldn't run multiple scrubs across one CF.

> Make SSTABLESCRUB and related jobs multi-threaded  / parallelize somehow
> ------------------------------------------------------------------------
>
>                 Key: CASSANDRA-11324
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11324
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Thom Valley
>            Priority: Minor
>
> SSTABLE scrub right now appears to be single threaded in offline mode (unsure about online).
 When scrubbing a node, especially a well provisioned one, the node sits mostly idle for potentially
hours while scrubbing.
> Making better use of available resources through parallelization / multi-threading of
the scrub process seems like a good idea.



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