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From "Brandon Williams (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3264) Add wide row paging for ColumnFamilyInputFormat and ColumnFamilyOutputFormat
Date Thu, 29 Sep 2011 23:09:47 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13117720#comment-13117720
] 

Brandon Williams commented on CASSANDRA-3264:
---------------------------------------------

Hmm, couldn't we tranpose like CASSANDRA-2474 would allow?  Then when we switch to CQL in
the hadoop support it's seamless.
                
> Add wide row paging for ColumnFamilyInputFormat and ColumnFamilyOutputFormat
> ----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-3264
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3264
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Hadoop
>            Reporter: T Jake Luciani
>              Labels: lhf
>             Fix For: 0.8.7
>
>
> Hadoop input/output formats currently can OOM on wide rows.
> We can add a new option to the ConfigHelper like columnPagingSize with a default of Integer.MAX_VALUE.
> The input format would page the row internally rather than pull it over at once.
> The output format could also use this to avoid sending huge rows over at once.

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