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Riak Map/Reduce Improvements Explained

Riak 0.14.0 included a couple of very exciting improvements for Map/Reduce. In a recent post, Basho guys are spending again some time to explain them:

If the application can store meaningful data in the keys, then key filtering can query just the keys and load only the objects whose keys pass the filter to be processed by the MapReduce job. […] Key filtering will support boolean operators (and, or, not), url decoding, string tokenizing, regular expressions, and various string to numeric conversions.

Similar to Kevin Smith’s presentation on Riak map/reduce improvements, this post covers also the Map/Reduce query planner and the optimized JavaScript VM pools.

Original title and link: Riak Map/Reduce Improvements Explained (NoSQL databases © myNoSQL)

via: http://blog.basho.com/2011/01/06/a-deeper-look-at-riak's-mapreduce-enhancements/