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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3122) SSTableSimpleUnsortedWriter take long time when inserting big rows
Date Mon, 05 Sep 2011 10:26:09 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13097112#comment-13097112
] 

Hudson commented on CASSANDRA-3122:
-----------------------------------

Integrated in Cassandra-0.8 #313 (See [https://builds.apache.org/job/Cassandra-0.8/313/])
    Add missing file and fix type from CASSANDRA-3122 commit

slebresne : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1165218
Files : 
* /cassandra/branches/cassandra-0.8/test/unit/org/apache/cassandra/io/sstable/SSTableSimpleWriterTest.java
* /cassandra/branches/cassandra-0.8/test/unit/org/apache/cassandra/io/sstable/SSTableWriterTest.java


> 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
>            Assignee: Sylvain Lebresne
>            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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