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Date: Sat, 2 Jul 2011 18:58:22 +0000 (UTC)
From: "Jeremy Hanna (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Commented] (CASSANDRA-1125) Filter out ColumnFamily rows
 that aren't part of the query
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    [ https://issues.apache.org/jira/browse/CASSANDRA-1125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13059098#comment-13059098 ] 

Jeremy Hanna commented on CASSANDRA-1125:
-----------------------------------------

So does this only include key ranges - that's what it sounds like.  And indexes are out for now too, it sounds like - e.g. where timebucket = 12345.

> Filter out ColumnFamily rows that aren't part of the query
> ----------------------------------------------------------
>
>                 Key: CASSANDRA-1125
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1125
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Hadoop
>            Reporter: Jeremy Hanna
>            Assignee: Mck SembWever
>            Priority: Minor
>             Fix For: 1.0
>
>         Attachments: 1125-formatted.txt, CASSANDRA-1125.patch
>
>
> Currently, when running a MapReduce job against data in a Cassandra data store, it reads through all the data for a particular ColumnFamily.  This could be optimized to only read through those rows that have to do with the query.
> It's a small change but wanted to put it in Jira so that it didn't fall through the cracks.

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