On Wed, Jun 20, 2012 at 8:00 AM, Morgan Segalis <msega...@gmail.com> wrote: > Why would you think that fetch both user and look through the links is > fastest than A -> B -> A ? Are links really that slow ?
It's not that links are that slow, but that they're not that focused. Unless you're using B's key as the tag on the link from A, and A's key as the tag on the link from B, you'll have to follow all "person" or "friend" (or whatever) links from A, and the same from B. So, what you'd actually be walking is A -> [any person/friend] -> A. You could put a map or reduce phase between the two link phases to filter out everything but B, but my bet is that simply fetching A and B individually will be much faster than setting up and tearing down the MR framework. YMMV, always benchmark real data, etc. -Bryan _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
