Some more back story. I initially started with Solaris 10 u8, and was getting 40ish MB/s reads, and 65-70MB/s writes, which was still a far cry from the performance I was getting with OpenFiler. I decided to try Opensolaris 2009.06, thinking that since it was more "state of the art & up to date" then main Solaris. Perhaps there would be some performance tweaks or bug fixes which might bring performance closer to what I saw with OpenFiler. But, then on an untouched clean install of OpenSolaris 2009.06, ran into something...else...apparently causing this far far far worse performance.
But, at the end of the day, this is quite a bomb: "A single raidz2 vdev has about as many IOs per second as a single disk, which could really hurt iSCSI performance." If I have to break 24 disks up in to multiple vdevs to get the expected performance might be a deal breaker. To keep raidz2 redundancy, I would have to lose..almost half of the available storage to get reasonable IO speeds. Now knowing about vdev IO limitations, I believe the speeds I saw with Solaris 10u8 are inline with those limitations, and instead of fighting with whatever issue I have with this clean install of OpenSolaris, I reverted back to 10u8. I guess I'll just have to see if the speeds that Solaris ISCSI w/ZFS is capable of, is workable for what I want to do, and what the size sacrifice/performace acceptability point is at. Thanks for all the responses and help. First time posting here, and this looks like an excellent community. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
