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https://issues.apache.org/jira/browse/CASSANDRA-1050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12871113#action_12871113
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Jonathan Ellis commented on CASSANDRA-1050:
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btw, if you build the thrift code with "ant gen-thrift-java" it will re-run rat 
for you to avoid blowing away the apache license headers in the generated code

> Too many splits for ColumnFamily with only a few rows
> -----------------------------------------------------
>
>                 Key: CASSANDRA-1050
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1050
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 0.6
>            Reporter: Joost Ouwerkerk
>            Assignee: Johan Oskarsson
>             Fix For: 0.7
>
>         Attachments: CASSANDRA-0.6-1050.patch, CASSANDRA-1050.patch
>
>
> ColumnFamilyInputFormat creates splits for the entire Keyspace.  If one 
> ColumnFamily has 100 Million rows and another has only 100 rows, the number 
> of splits will be the 1,526 (assuming 64k rows per split) for either one, 
> since it is based on the total number of unique keys across the whole 
> keyspace, and not on the number of rows in the ColumnFamily.

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