On Tue, Sep 14, 2010 at 08:08:42AM -0700, Ray Van Dolson wrote: > On Tue, Sep 14, 2010 at 06:59:07AM -0700, Wolfraider wrote: > > We are looking into the possibility of adding a dedicated ZIL and/or > > L2ARC devices to our pool. We are looking into getting 4 ??? 32GB > > Intel X25-E SSD drives. Would this be a good solution to slow write > > speeds? We are currently sharing out different slices of the pool to > > windows servers using comstar and fibrechannel. We are currently > > getting around 300MB/sec performance with 70-100% disk busy. > > > > Opensolaris snv_134 > > Dual 3.2GHz quadcores with hyperthreading > > 16GB ram > > Pool_1 ??? 18 raidz2 groups with 5 drives a piece and 2 hot spares > > Disks are around 30% full > > No dedup > > It'll probably help. > > I'd get two X-25E's for ZIL (and mirror them) and one or two of Intel's > lower end X-25M for L2ARC. > > There are some SSD devices out there with a super-capacitor and > significantly higher IOPs ratings than the X-25E that might be a better > choice for a ZIL device, but the X-25E is a solid drive and we have > many of them deployed as ZIL devices here. >
I thought Intel SSDs didn't respect CACHE FLUSH command and thus are subject to ZIL corruption if the server crashes or runs out of electricity? -- Pasi _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
