On Fri, 1 Aug 2008, Rick N wrote: > Example Configuration # 1: > It will mostly be used as a "DAS" unit, Disk-Storage-Server, and > with the above capacity I am simply concerned primarily about raw > "PERFORMANCE" only. For example, I might want to just stripe 8 disks > across each of the above adaptec controllers, and then use (a ZFS) > filesystem to mirror them for redundancy. The performance is > required since I will running this system and experimenting with > lets say for example oracle, or mysql, database server, playing > around with ZFS,....?
Since you are looking for performance you should consider using the drives in JBOD mode. Other than possible NVRAM on the RAID controller, it might not provide any "boost" for you when using ZFS. I think that JBOD mode will definitely provide better performance for the database type applications you mention. In JBOD mode, ZFS can intelligently schedule I/O for different disks. Using two big mirrors will eliminate many optimization opportunities. Your RAID LUNs arranged as RAID-0 may improve raw sequential I/O throughput, but at the expense of random I/O throughput. Regardless, there is no substitute for testing various configurations to see what works best. Zfs makes the testing easy. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
