The reduce phase receives data in batches. Per the docs, the default size is for every 20 inputs, reduce. The batch size can be tuned via config or per m/r request.
Re: 13, likely what you're seeing is the length of the last phase sent to reduce. It seems if I return [values.length], I get just the last set that processed, whereas returning [values] gives me all results concatenated. I'd expect that I'd get length concatenated multiple times, but I must not be formatting the response properly. Regarding tuning (batch size): http://wiki.basho.com/MapReduce.html#Configuration-Tuning-for-Reduce-Phases <http://www.loomlearning.com/> * Jonathan Langevin Manager, Information Technology Loom Inc. Wilmington, NC: (910) 241-0433 - jlange...@loomlearning.com - www.loomlearning.com - Skype: intel352 * On Wed, Nov 30, 2011 at 9:03 AM, Yehuda Zargrov <yeh...@conduit.com> wrote: > Hi,**** > > ** ** > > I’ve posted a mail on this few days ago, but went a bit further since then. > **** > > ** ** > > I’m using ripple, running a map function on some input and getting a list > of about 50 items.**** > > ** ** > > Right after that, I’m running a reduce function. The first thing I do in > it is putting the length of v (the input) as an item in a list.**** > > ** ** > > When printing the result I see that the length is 13.**** > > ** ** > > It’s like something has happened between the map and reduce phases.**** > > ** ** > > Any ideas?**** > > ** ** > > **** > > [image: Description: > C:\Users\Yehuda\AppData\Roaming\Microsoft\Signatures\logo.gif]**** > > *Yehuda Zargrov** > *Software Engineer**** > > *Conduit Your Site* <http://www.conduit.com/>**** > > *t:* 972.8.9461713 ext +314 | *m:* +972503473119 | *f:* +97286382140 > **** > > > This message may contain confidential and/or privileged information. It is > intended to be read only by the individual or entity to whom it is > addressed or by their designee. > If the reader of this message is not the intended recipient, you are on > notice that any uses, copy, disclose or distribution of this message, in > any form, is strictly prohibited. > If you have received this message in error, please notify the sender by > reply email or by telephone and delete or destroy any copy of this message. > Thank you. > > **** > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > >
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