I recently had the chance to play with the new T5140 servers. Using the Sparc CMT architecture, these servers present an amazing 128 cpu's to you to use (as a combination of cores and compute threads, there are 2 sockets only).
We are doing some trials with eager Sun customers who want to utilize these babies. The good news is that MySQL Cluster 7.0 (aka 6.4) will support a multi-threaded data node option. The bad news is, one ndbd process still only uses about 8 CPU cores, so to utilize 128, there is some way to go! So the bad news is we still have to launch many ndbd processes to get out the full power of these boxes. But the good news is that with 7.0 there is at least a point in trying at all.
I developed a simple script which lets me easily start a varying amount of ndbd and mysqld processes on one host (and then copy the script to also start same amount of processes on another host). If you have been using Johan's excellent …[Read more]