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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4208) ColumnFamilyOutputFormat should support writing to multiple column families
Date Wed, 02 May 2012 16:40:50 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266690#comment-13266690
] 

T Jake Luciani commented on CASSANDRA-4208:
-------------------------------------------

@Robbie can you post your code analysis on the hadoop ticket?
                
> ColumnFamilyOutputFormat should support writing to multiple column families
> ---------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4208
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4208
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Hadoop
>    Affects Versions: 1.1.0
>            Reporter: Robbie Strickland
>         Attachments: trunk-4208.txt
>
>
> It is not currently possible to output records to more than one column family in a single
reducer.  Considering that writing values to Cassandra often involves multiple column families
(i.e. updating your index when you insert a new value), this seems overly restrictive.  I
am submitting a patch that moves the specification of column family from the job configuration
to the write() call in ColumnFamilyRecordWriter.

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