gistfile1.txt

09:36 <herewego> Anyone know if you can run multiple reduce phases in a map/reduce query? 

09:37 <seancribbs> herewego: yes. you can put them together in any combination 

09:37 <seancribbs> with the constraint, of course, that map phases receive lists of bucket/key[/keydata] 

09:38 <herewego> so i can run a sort reduce phase after a my own custom reduce phase, correct? 

09:38 <herewego> feeding one reduce into the other? 

09:39 <seancribbs> yep 

09:39 <seancribbs> absolutely 

09:40 <herewego> ok, cool 

09:43 <herewego> i'm wondering if maybe it would be advantageous to not do the sort reduce phase 
in Riak and instead do it after the fact on our web servers 

09:43 <herewego> just thinking about how i can offload processing from Riak 
(expensive, high io) to the web servers (cheap, low io) 

09:45 <seancribbs> herewego: well, once you get to reduce, it's not on disk, it's more in RAM 

09:46 <seancribbs> so there is the concern that you can exhaust RAM 
if your collection is too big 

09:46 <seancribbs> but other than that, it won't make much difference if you do it client side or in Riak 

09:46 <herewego> right, and i suppose that's an issue on either end 
09:46 <seancribbs> yes