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Brief MongoDB and Riak Comparison

The advantage of Riak over Mongo is that Riak automatically replicates and rebalances.

The advantage of MongoDB over Riak is that Mongo supports secondary indexes and a more robust query language.

Both Riak and MongoDB support MapReduce via JavaScript, and both use the SpiderMonkey JavaScript engine. However, Riak’s MapReduce framework is more powerful than MongoDB’s framework because Riak allows you to run MapReduce jobs on a filtered set of keys. By contrast, in Mongo, you have to run MapReduce jobs across an entire database.

All true.

Original title and link: Brief MongoDB and Riak Comparison (NoSQL database©myNoSQL)

via: http://linuxinstruction.com/?q=node/10