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https://issues.apache.org/jira/browse/CASSANDRA-10843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15108454#comment-15108454
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Marcus Eriksson commented on CASSANDRA-10843:
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I think this slight increase in live size is OK - seems we flush to a single
sstable on cassci (more memory than locally I guess), then running a compaction
can increase the live size slightly
Patch to allow 5% increase in live size:
https://github.com/krummas/cassandra-dtest/commits/marcuse/10843
> compaction data_size_tests are failing
> --------------------------------------
>
> Key: CASSANDRA-10843
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10843
> Project: Cassandra
> Issue Type: Sub-task
> Components: Compaction, Testing
> Reporter: Philip Thompson
> Assignee: Marcus Eriksson
> Fix For: 2.1.x, 2.2.x
>
>
> {{compaction_test.TestCompaction_with_LeveledCompactionStrategy.data_size_test}}
> as well as the data_size tests for STCS and DTCS are failing. See
> http://cassci.datastax.com/job/cassandra-2.1_dtest/373/testReport/
> These tests write out some data, check live size, compact, then check live
> size again. On 2.1 and 2.2, we are seeing an increase in live size after the
> compaction. This is not occurring on 3.0. I cannot reproduce locally on OSX.
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