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Posted to commits@cassandra.apache.org by "Jonathan Ellis (Updated) (JIRA)" <ji...@apache.org> on 2012/01/20 20:32:40 UTC
[jira] [Updated] (CASSANDRA-2878) Allow map/reduce to use
server-side query filters
[ https://issues.apache.org/jira/browse/CASSANDRA-2878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis updated CASSANDRA-2878:
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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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