And getting the flowing results:
18disks raid10 Read 0b Written 9.9037Gb Total transferred 9.9037Gb (84.467Mb/sec) 5405.88 Requests/sec executed
I get 5400 random writes per second on the 18 disks raid 10. Our dba is saying that he is getting 10K on a 4 disk raid10. I believe I am getting the correct performance out of this array. But I do not have a real base line. I am looking for benchmarks of similar systems `16-20 disk raid 10 with the same sysbench command I ran above.
I am also looking for any configuration problems that would lead to 4disks running 2 times as fast as 18 disks.