Thanks for the info. This is what I understood from the doc, the examples and the tests I did. I was wondering if there was something I was missing to be able to traverse a complete graph using a simple call.
I don't know how the mapreduce link query is actually executed in the mapreduce engine, if its distributed (i think not) but, AFAIK a function cannot be defined, only patterns. Only the map and reduce queries can have functions. Unless we can find a way to daisychain mapreduce jobs for each link step? Otherwise, traversal can be done at the application level I guess, requiring new mapreduce for each "next" link. But it would be really nice to be able to run a mapreduce job over a complete graph defined with links. Thanks, Colin On Mon, Apr 12, 2010 at 5:18 PM, Alexander Sicular <sicul...@gmail.com> wrote: > Colin, > > Link walking http calls are non exhaustive. So if you wanted to follow, for > example, two levels of depth you would have to do something like: > > http://localhost:8098/raw/bucket/key/_,_,_/_,_,_ > > Check here, http://blog.basho.com/2010/02/24/link-walking-by-example/, and > here, https://wiki.basho.com/display/RIAK/REST+API#RESTAPI-Linkwalking, if > you haven't already. > > Otherwise you need to build your own recursive function. I'm not exactly sure > what that would look like in Riak M/R. > > -Alexander > > > On Apr 12, 2010, at 5:07 PM, Colin Surprenant wrote: > >> Hi, >> >> If I create a linked list of many items (unknown size) in a bucket, >> for example, item1 links to item2, item2 links to item3, and so on, is >> there a way to retrieve the complete set of items in a single >> link-walking query or mapreduce query?? >> >> It looks like it only gathers the item direct childs and not the whole graph. >> >> Thanks for your help, >> Colin >> >> _______________________________________________ >> 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
