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MapReduce >> mail # user >> Keeping track of the mappers that feed a reducer


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preethi ganeshan 2013-03-13, 08:31
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Re: Keeping track of the mappers that feed a reducer
Why not just materialise the mapper information into the values that are
emitted?

No need to rewrite Hadoop - just change the application code.

On 13 March 2013 08:31, preethi ganeshan <[EMAIL PROTECTED]>wrote:

> Hi,
> I have to modify the Task.java class and the MapTask.java class to keep
> track of the mappers that feed a reducer .How do i go about doing this ?
>
> Regards,
> Preethi
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB