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From "Ding, Hui" <hui.d...@sap.com>
Subject RE: Is map-reduce-merge coming?
Date Thu, 11 Sep 2008 23:17:47 GMT
So?
Hadoop already supports performing join using mapreduce, with Hbase as
source or sink? 

-----Original Message-----
From: Jim Kellerman [mailto:jim@powerset.com] 
Sent: Thursday, September 11, 2008 4:16 PM
To: hbase-dev@hadoop.apache.org
Subject: RE: Is map-reduce-merge coming?

HBase can be a source or a sink for map/reduce operations. See
org.apache.hadoop.hbase.mapred.*

---
Jim Kellerman, Senior Software Development Engineer
Powerset (Live Search, Microsoft Corporation)


> -----Original Message-----
> From: Ding, Hui [mailto:hui.ding@sap.com]
> Sent: Thursday, September 11, 2008 4:10 PM
> To: hbase-dev@hadoop.apache.org
> Subject: Is map-reduce-merge coming?
>
> Just read the map-reduce-merge paper by the Yahoo! folks.  It seems
> there's nothing fancy:just combined two map-reduce together and use a
> merge for coordination.
> But still, it would be great to see how it works.  I'm wondering if
> there is on-going effort to put this into the hbase impl? Or does
hadoop
> has this already?

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