[jira] Commented: (CASSANDRA-1227) Input and Output column families should be configured independently

["Hudson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-1227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884919#action_12884919 ] 

Hudson commented on CASSANDRA-1227:
-----------------------------------

Integrated in Cassandra #484 (See [http://hudson.zones.apache.org/hudson/job/Cassandra/484/])
    allow Hadoop output to go to a different KS + CF than input.  patch by Bryan Tower; reviewed by jbellis for CASSANDRA-1227


> Input and Output column families should be configured independently
> -------------------------------------------------------------------
>
>                 Key: CASSANDRA-1227
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1227
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Hadoop
>    Affects Versions: 0.7
>            Reporter: Bryan Tower
>            Assignee: Bryan Tower
>             Fix For: 0.7
>
>         Attachments: trunk-1227.txt
>
>
> I would like to use a ColumnFamilyInputFormat  and a ColumnFamilyRecordReader to map a bunch of data from Cassandra to a job and then I would like to do some operations on the data and in the Reducer write out some summary of the work that I have done.  Both the ColumnFamilyInputFormat and the ColumnFamilyOutputFormat read the column family from the same configuration property in the job configuration object (they both use the ConfigHelper.COLUMNFAMILY_CONFIG property).  This means that I can not read from one Cassandra column family and write out to different one in the same job with the existing code.
> I changed the ColumnFamilyOutputFormat to read from "cassandra.output.columnfamily" instead of the "cassandra.input.columnfamily" that it was using before.
> I changed the COLUMNFAMILY_CONFIG property and related methods to include the word input.  I also added corresponding Output versions of each of the relevant properties that should be configured for the ColumnFamilyOutputFormat.

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