bsousa wrote: > > Greetings to all ! > > I'm quite new in this opensolaris/zfs world, but it seems like this a > very nice piece of software and i would like to have some advise from > people that now what they say/do. > With this in mind i have a system with : > > * SUN X2200 with 2xdual core AMD cpu's with 12GB attached to a > SATA chassis acting like a JOBD (no raid card here, only a LSI > HBA to connect SAS cable) > * 12 SATA 1TB Seagate Barracuda with 32mb cache > * opensolaris 5.11 snv_101b > > Our current storage it's a Sun Storedge 5210 with a 5 disks (10k scsi) > in a Raid 5 layout.I want to see if Opensolaris+ZFS+commodity hardware > can deliver better performance for a Sun Java Communications Suite > mailstore,i assume it will have random small read/write I/Os, with a > size of 400GB. > The SUN 5210 it's mounted to the mailserver by NFS v3, and this new > storage will be made available to the mailserver using NFS v3 as well. > Regarding the zpool layout, my question is : > > * what's the best configuration for performance, specially in > reading from storage > > I think that a mirror would deliver the best performance and giving us > the lowest capacity, and on the opposite we have RaidZ or RaidZ2. So > should i create a zpool with 3 sets of 2 disks mirrored, a raidz with > 6 disks, or 1 zpool with 2 raidz sets on it? >
Your right on in your thinking. Mirror'ed pairs are going to maximize your performance and should be the preference. Giving up so much capacity to mirrored pairs is painful, but not nearly as painful as having a lot of capacity that is really slow. Additionally, if you have a couple spare dollars, I _highly_ suggest getting an SSD. Use one slot for SSD ZIL (ZFS Intent Log, think of it as a write cache). The SSD for ZIL will _significantly_ improve your write performance, especially for NFS and mail. It will well be worth the $500 or so. benr. _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
