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From "Jonathan Ellis (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-2878) Allow map/reduce to use server-side query filters
Date Fri, 20 Jan 2012 19:32:40 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-2878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-2878:
--------------------------------------

    Description: 
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.


  was:
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.

Adding CQL support to m/r will allow using an index more simply than trying to cram support
for more parameters into the job configuration.

        Summary: Allow map/reduce to use server-side query filters  (was: Allow CQL-based
map/reduce)
    
> Allow map/reduce to use server-side query filters
> -------------------------------------------------
>
>                 Key: CASSANDRA-2878
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2878
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Hadoop
>            Reporter: Mck SembWever
>            Assignee: Jonathan Ellis
>            Priority: Critical
>             Fix For: 1.1
>
>
> 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.

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