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https://issues.apache.org/jira/browse/CASSANDRA-3122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096148#comment-13096148
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Jonathan Ellis commented on CASSANDRA-3122:
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+1
I also note that newSuperColumn in abstract writer is unused.
> SSTableSimpleUnsortedWriter take long time when inserting big rows
> ------------------------------------------------------------------
>
> Key: CASSANDRA-3122
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3122
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 0.8.3
> Reporter: Benoit Perroud
> Priority: Minor
> Fix For: 0.8.5
>
> Attachments: 3122.patch, SSTableSimpleUnsortedWriter-v2.patch,
> SSTableSimpleUnsortedWriter.patch
>
>
> In SSTableSimpleUnsortedWriter, when dealing with rows having a lot of
> columns, if we call newRow several times (to flush data as soon as possible),
> the time taken by the newRow() call is increasing non linearly. This is
> because when newRow is called, we merge the size increasing existing CF with
> the new one.
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