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by ukd1 5101 days ago
Most of the current MongoDB drivers support routing read queries to the lowest latency replica set member - this solves part of the problem.

Choice of database when planning a project is a more fundamental problem, knowing what to use and why - is the trade off for Riak / Cassandra worth it over MongoDB or even MySQL? This people decide on a per-project basis and of course when starting don't always make the right longer term choice.