It's possible to update objects from Erlang MapReduce, but that doesn't 
conflict with the answer to 4) because it's still a similar workflow of 
fetching (through MapReduce) and then storing the object back. The original 
question refered to partial updates, e.g. appending a new entry to a list 
stored e.g. as JSON under a specific key in an atomic fashion, which is not 
possible in Riak either way.

Mathias Meyer
Developer Advocate, Basho Technologies


On Samstag, 30. Juli 2011 at 11:47, Jonathan Langevin wrote:

> Re: 4) - This is regarding to updating the data that belongs to a key, 
> correct?
> I've read elsewhere that it's possible to modify & save an object via a MR 
> call, is that correct? (seems it would conflict with the answer to point 4)
> 
> 
> Jonathan Langevin
> Systems Administrator
> Loom Inc.
> Wilmington, NC: (910) 241-0433 - jlange...@loomlearning.com 
> (mailto:jlange...@loomlearning.com) - www.loomlearning.com 
> (http://www.loomlearning.com/) - Skype: intel352 
> 
> 
> On Fri, Jul 29, 2011 at 7:39 PM, Mark Phillips <m...@basho.com 
> (mailto:m...@basho.com)> wrote:
> >  Afternoon, Evening, Morning to All -
> > 
> >  Short Recap for today.
> > 
> >  Enjoy and have a great weekend.
> > 
> >  Mark
> > 
> >  Community Manager
> >  Basho Technologies
> > wiki.basho.com (http://wiki.basho.com)
> > twitter.com/pharkmillups (http://twitter.com/pharkmillups)
> >  -----------------------------------
> > 
> >  Riak Recap for July 27 - 28
> >  ====================
> > 
> >  1) Last reminder to register for the "Riak and Python" webinar
> >  happening on August 2nd. (If you don't register, you run the risk of
> >  hurting Mathias' feelings).
> > 
> >  * Details here --->
> > http://blog.basho.com/2011/07/19/Riak-and-Python-Webinar-Happening-August-2/
> > 
> >  2) Kresten Krab Thorup's talk from Erlang Factory London about his
> >  Riak Mobile project is now available in video form.
> > 
> >  * Watch here --->
> > http://www.erlang-factory.com/conference/London2011/speakers/KrestenKrabThorup
> > 
> >  3) Looks like Riak will be one of the topics at the next Ruby Meetup
> >  happening in Colima, Mexico.
> > 
> >  * Details here ---> http://www.meetup.com/rubyco/events/24982511/
> > 
> >  4) Q --- Is it possible to add data to a key in riak? (from doki_pen via 
> > #riak)
> > 
> > A --- No. You'll always have to fetch, update, and store the object.
> > 
> >  _______________________________________________
> >  riak-users mailing list
> > riak-users@lists.basho.com (mailto:riak-users@lists.basho.com)
> > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
> 
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