Searching and sorting with mapreduce or solr?

siculars at siculars at
Mon May 2 19:13:58 EDT 2011

Riak m/r is a scan operation. Solr is an indexed operation. By definition an indexed operation will be faster than a scan operation. Just something to keep in mind. 

You also mention "search by field" but Riak is opaque to values so I will just assume your values are json (not to say that you can't operate on non json data). 
Basically you are going to run a map function that has your filter in it. And then pass those results to a reduce function that implements a sort. 

Your actual implementation will take advantage of features made available by the client you use. I mainly use the nodejs javascript client, riakjs, which has very good support for building m/r queries. 

I have two articles on my blog which may help you out.


Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: Odelon Miranda <odie.miranda at>
Sender: riak-users-bounces at
Date: Tue, 3 May 2011 06:41:40 
To: <riak-users at>
Subject: Searching and sorting with mapreduce or solr?

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