• We've been evaluating MySQL Vs SQL2008. So far the cheapness of MySQL means that a scaleout architecture is a practical proposition. Performance wise scale-up is not so hot. Go beyond 4CPU and see what happens.

    NDB is brilliant for ultra-high concurrency reads. Sun don't recommend going beyond 8 data nodes though in theory you can go up to 48. Bear in mind you lose the performance if you start doing joins between tables so you have to be careful about what you want to do.

    With the religious flame wars you get emotive statements rather than scientific facts so you get statements such as MySQL InnoDB out-performs SQL Server or vice verse.

    Great, which version of each engine, what hardware spec, doing what?