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https://issues.apache.org/jira/browse/CASSANDRA-1227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Tower updated CASSANDRA-1227:
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Attachment: trunk-1227.txt
This patch file includes all of the changes needed to allow the
ColumnInputFormat and the ColumnOutputFormat to be configured independently.
> 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
> 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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