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From "Benoit Perroud (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-3122) SSTableSimpleUnsortedWriter take long time when inserting big rows
Date Fri, 02 Sep 2011 09:20:09 GMT

     [ 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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