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HBase, mail # user - MapReduce: Reducers partitions.

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Re: MapReduce: Reducers partitions.
Stack 2013-04-11, 00:26
On Wed, Apr 10, 2013 at 6:54 AM, Jean-Marc Spaggiari <

> Hi Nitin,
> You got my question correctly.
> However, I'm wondering how it's working when it's done into HBase.

We use the default MapReduce partitioner:

> Do we have defaults partionners ...


> ...so we have the same garantee that records
> mapping to one key go to the same reducer.

This will happen w/ the default partitioner (key is hashed.  hash is always
the same so always goes to same location).

> Or do we have to implement
> this one our own.