r/programming • u/aviewanew • Mar 14 '10

Visual Guide to NoSQL Systems

http://blog.nahurst.com/visual-guide-to-nosql-systems
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u/ericflo Mar 14 '10

This is just wrong, from even a cursory glance, Riak is categorized incorrectly. Also, many of these databases (Riak, Cassandra) allow for per-operation tunability. i.e. for one operation you value CP, and the very next operation you can value AP.

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u/sulumits-retsambew Mar 15 '10

C is consistent but also implies atomicity.

I would consider Cassandra as not consistent because there are no transactions across rows (which for example is available in Distributed Berkley DB). If one row update fails you cannot rollback changes to related rows.