Mikael Carneholm wrote:
Btw, here's the bonnie++ results from two different array sets (10+18, 4+24) on the MSA1500: LUN: DATA, 24 disks, stripe size 64K ------------------------------------- Version 1.03 ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP sesell01 32G 59443 97 118515 39 25023 5 30926 49 60835 6 531.8 1 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 2499 90 +++++ +++ +++++ +++ 2817 99 +++++ +++ 10971 100
It might be interesting to see if 128K or 256K stripe size gives better sequential throughput, while still leaving the random performance ok. Having said that, the seeks/s figure of 531 not that great - for instance I've seen a 12 disk (15K SCSI) system report about 1400 seeks/s in this test.
Sorry if you mentioned this already - but what OS and filesystem are you using? (if Linux and ext3, it might be worth experimenting with xfs or jfs).
Cheers Mark