True, this setup is not designed for high random I/O, but rather lots of storage with fair performance. This box is for our dev/test backend storage. Our production VI runs in the 500-700 IOPS (80+ VMs, production plus dev/test) on average, so for our development VI, we are expecting half of that at most, on average. Testing with parameters that match the observed behavior of the production VI gets us about 750 IOPS with compression (NFS, 2009.06), so I am happy with the performance and very happy with the amount of available space.
Stripped mirrors are much faster, ~2200 IOPS with 16 disks (but alas, tested with iSCSI on 2008.11, compression on. We got about 1,000 IOPS with the 3x5 raidz setup with compression to compare iSCSI and 2008.11 vs NFS and 2009.06), but again we are shooting for available space, with performance being a secondary goal. And yes, we would likely get much better performance using SSDs for the ZIL and L2ARC. This has been an interesting thread! Sorry for the bit of hijacking... -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
