Matt, That's a good idea; I'll see if I can add that to the docs.
Dmitri On Mon, Apr 8, 2013 at 7:26 PM, Matt Black <matt.bl...@jbadigital.com>wrote: > I think an short and explicit discussion of using sequential GETs would be > good to add to the docs in [1]. It'll be helpful to put the alternate > option in the reader's head so they can evaluate as they're going through > the article. > > Cheers > Matt > > > On 9 April 2013 02:02, Jeremiah Peschka <jeremiah.pesc...@gmail.com>wrote: > >> I want to follow up on the recent "Map phase timeout" thread [2]. In part >> out of curiosity and in part as a documentation clean up... Should the >> documentation at [1] be changed? Specifically, the docs say MR should be >> used: >> >> - *When you know the set of objects you want to MapReduce over (the >> bucket-key pairs) *(emphasis added) >> - When you want to return actual objects or pieces of the object – >> not just the keys, as do Search & Secondary Indexes >> - When you need utmost flexibility in querying your data. MapReduce >> gives you full access to your object and lets you pick it apart any way >> you >> want. >> >> It seems to me that a lot of discussions around MR in Riak come down to >> "You're close but this isn't the best use case of MapReduce in Riak." Would >> it be better, for the purposes of a general discussion, to say that >> MapReduce is the appropriate paradigm when you want to: >> >> - manipulate a large amount of data inside the Riak cluster in bulk - >> e.g. read all of my sales orders and where the version is 1, perform the >> changes necessary to update the order format to version 2. >> - burn a lot of I/O and make your admin sad >> - move data from one bucket to another >> - re-write an entire bucket so all data is indexed for 2i, search, etc >> - Anything where the query can be resumed with no knowledge of state >> at the time the last run of the query failed. >> >> Are there other use cases when MR is the better approach? >> >> [1]: >> http://docs.basho.com/riak/latest/tutorials/querying/MapReduce/#When-to-Use-MapReduce >> [2]: >> http://riak.markmail.org/search/?q=#query:+page:1+mid:4o27v64qf55ejzwc+state:results >> >> --- >> Jeremiah Peschka - Founder, Brent Ozar Unlimited >> MCITP: SQL Server 2008, MVP >> Cloudera Certified Developer for Apache Hadoop >> >> _______________________________________________ >> riak-users mailing list >> riak-users@lists.basho.com >> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com >> >> > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > >
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