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https://issues.apache.org/jira/browse/CASSANDRA-6851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14053028#comment-14053028
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Russell Alexander Spitzer commented on CASSANDRA-6851:
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Updated branch at
https://github.com/RussellSpitzer/cassandra/compare/CASSANDRA-6851?expand=1
Sorry for the delay again but DSE waits for no one.
I've moved the grouping function to AbstractCompactionStrategy with the default
implementation being the numeric grouper using a group size of 2. For Leveled
compaction strategy I overrode the function to first bin by level, and then
group.
I've also added a few tests for anti-compacting a table with 10 sstables and a
test for Leveled Compaction Strat to make sure it's grouping method does not
return groups with sstables from mixed levels.
I tried to fix up most of the style issues and fix up the imports so they are
more consistent (no wildcards).
As usual please let me see anything out of place or anything that can use
improvement and I'll continue to try to get IDEA to respect my chosen style
conventions.
> Improve anticompaction after incremental repair
> -----------------------------------------------
>
> Key: CASSANDRA-6851
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6851
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Marcus Eriksson
> Assignee: Russell Alexander Spitzer
> Priority: Minor
> Labels: compaction, lhf
> Fix For: 2.1.1
>
>
> After an incremental repair we iterate over all sstables and split them in
> two parts, one containing the repaired data and one the unrepaired. We could
> in theory double the number of sstables on a node.
> To avoid this we could make anticompaction also do a compaction, for example,
> if we are to anticompact 10 sstables, we could anticompact those to 2.
> Note that we need to avoid creating too big sstables though, if we
> anticompact all sstables on a node it would essentially be a major compaction.
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