[jira] [Updated] (CASSANDRA-7776) Allow multiple MR jobs to concurrently write to the same column family from the same node using CqlBulkOutputFormat

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

     [ https://issues.apache.org/jira/browse/CASSANDRA-7776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Pak updated CASSANDRA-7776:
--------------------------------
    Description: After sstables files are written, all files in the specified output directory are loaded (transferred) to the remote cassandra cluster. If multiple writes occur on a node to the same table (i.e. directory), then the multiple load processes end up transferring the same sstable files multiple times. This can be remedied by using unique output directories for each MR job.  (was: This can be done by using unique output directories for each MR job.)

> Allow multiple MR jobs to concurrently write to the same column family from the same node using CqlBulkOutputFormat
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-7776
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7776
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Hadoop
>            Reporter: Paul Pak
>            Assignee: Paul Pak
>            Priority: Minor
>              Labels: cql3, hadoop
>         Attachments: trunk-7776-v1.txt
>
>
> After sstables files are written, all files in the specified output directory are loaded (transferred) to the remote cassandra cluster. If multiple writes occur on a node to the same table (i.e. directory), then the multiple load processes end up transferring the same sstable files multiple times. This can be remedied by using unique output directories for each MR job.



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