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Posted to commits@cassandra.apache.org by "Benoit Perroud (JIRA)" <ji...@apache.org> on 2011/09/02 11:20:09 UTC

[jira] [Updated] (CASSANDRA-3122) SSTableSimpleUnsortedWriter take long time when inserting big rows

     [ https://issues.apache.org/jira/browse/CASSANDRA-3122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benoit Perroud updated CASSANDRA-3122:
--------------------------------------

    Attachment: SSTableSimpleUnsortedWriter.patch

Small patch that merge the smallest CF with the other one instead of always the existing one with the new one.

> 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
>         Attachments: 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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