My Cassandra benchmarks were performed a couple of months ago.
Turns out MongoDB doesn't scale well with number of connections due to software issues (eg. one thread per connection instead of async io). At about 500 connections Mongo starts to break on the platform we tested.
Turns out MongoDB doesn't scale well with number of connections due to software issues (eg. one thread per connection instead of async io). At about 500 connections Mongo starts to break on the platform we tested.