Orvar, With my testing, i've seen a 5x improvement with small file creation when working specifically with NFS. This is after I added an SSD for the ZIL.
I recommend Richard Elling's zilstat (he posted links earlier). It'll let you see if a dedicated device for the ZIL will help your specific workload. My understanding is that you'll get "more bang for the buck" using an SSD for the ZIL rather than the L2ARC. Performing some of your own benchmarks is really the only way see what will help improve performance for your specific workload. I recommend reading up on the ZFS ARC and L2ARC, to help try to determine if testing a dedicated L2ARC device is even worthwhile for your uses. I know it wasn't really helpful for me, as our read performance is already great. As for a specific SSD, I've tested the Intel X25E. It's around $600 or so. It's got about half the performance of the snazzy, pricey STEC Zeus drives. With the specific workload I was trying to accelerate, I wasn't hitting any of the limits of the Intel SSDs (but I was definitely WAY past the performance limits of a standard hard disk). Again, all of this was for accelerating the ZIL, not for use on the L2ARC, so YMMV. Fishworks does this. They use an SSD both for the read cache as well as the ZIL. -Greg Orvar Korvar wrote: > So are there no guide lines how to add a SSD disk as a home user? Which is > the best SSD disk to add? What percentage improvements are typical? Or, will > a home user not benefit from adding a SSD drive? It is only enterprise SSD > drives that works, together with some esoteric software from Fishworks? It > requires Enterprise hardware to get a boost from SSD? Not possible? Or? > > No one has done this yet? What does the Fishworks team say? _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
