Well, I just got in a system I am intending to be a BIG fileserver; background- I work for a SAN startup, and we're expecting in our first year to collect 30-60 terabytes of Fibre Channel traces. The purpose of this is to be a large repository for those traces w/ statistical analysis run against them. Looking at that storage figure, I decided this would be a perfect application for ZFS. I purchased a Super Micro chassis that's 4u and has 24 slots for SATA drives. I've put one quad-core 2.66 ghz processor in & 8gig of ECC ram. I put in two Areca 1231ML ( http://www.areca.com.tw/products/pcie341.htm ) controllers which come with Solaris drivers. I've half-populated the chassis with 12 1Tb drives to begin with, and I'm running some experiments. I loaded OpenSolaris 05-2008 on the system.
I configured up an 11 drive RAID6 set + 1 hot spare on the Areca controller put a ZFS on that raid volume, and ran bonnie++ against it (16g size), and achieved 150 mb/s write, & 200 mb/s read. I then blew that away, configured the Areca to present JBOD, and configured ZFS with RAIDZ2 11 disks, and a hot spare. Running bonnie++ against that, it achieved 40 mb/sec read and 40 mb/sec write. I wasn't expecting RAIDZ to outrun the controller-based RAID, but I wasn't expecting 1/3rd to 1/4 the performance. I've looked at the ZFS tuning info on the solaris site, and mostly what they said is "tuning is evil", with a few things for Database tuning. Anyone got suggestions on whether there's something I might poke at to at least get this puppy up closer to 100 mb/sec? Otherwise, I may dump the JBOD and go back to the controller-based RAID. Cheers Ross -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
