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Posted to commits@cassandra.apache.org by "Jeremy Hanna (JIRA)" <ji...@apache.org> on 2011/04/22 22:48:06 UTC
[jira] [Commented] (CASSANDRA-2527) Add ability to snapshot data as
input to hadoop jobs
[ https://issues.apache.org/jira/browse/CASSANDRA-2527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13023391#comment-13023391 ]
Jeremy Hanna commented on CASSANDRA-2527:
-----------------------------------------
I remember the acunu guys talking about having point-in-time versioning for sstables. That would be a helpful feature for doing something like this.
> Add ability to snapshot data as input to hadoop jobs
> ----------------------------------------------------
>
> Key: CASSANDRA-2527
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2527
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Jeremy Hanna
> Labels: hadoop
>
> It is desirable to have immutable inputs to hadoop jobs for the duration of the job. That way re-execution of individual tasks do not alter the output. One way to accomplish this would be to snapshot the data that is used as input to a job.
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