Home | About | Sematext search-lucene.com search-hadoop.com
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
 Search Hadoop and all its subprojects:

Switch to Threaded View
MapReduce >> mail # user >> Collecting MAP output in a Iterator


Copy link to this message
-
Re: Collecting MAP output in a Iterator
The reducer has to open MAP2 explicitly. If it is a regular file, it
has to be in distributed cache.

On Mon, Aug 20, 2012 at 12:56 PM, Siddharth Tiwari
<[EMAIL PROTECTED]> wrote:
>
> Hi
>
> I have two mappers MAP1 and MAP2, which collect data from two different
> files,
> In reducer I want to traverse all keys and values of MAP2 for each key and
> value of  MAP1.
> How can I achieve it in one Reducer.
>
> Please suggest
>
>
> *------------------------*
> Cheers !!!
> Siddharth Tiwari
> Have a refreshing day !!!
> "Every duty is holy, and devotion to duty is the highest form of worship of
> God.”
> "Maybe other people will try to limit me but I don't limit myself"

--
Lance Norskog
[EMAIL PROTECTED]
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