Ok, Let's think about this for a minute. The log drive is c1t11d0 and it appears to be almost completely unused, so we probably can rule out a ZIL bottleneck. I run Ubuntu booting iSCSI against OSol 128a and the writes do not appear to be synchronous. So, writes aren't the issue.
>From the Linux side, it appears the drive in question is either sdb or dm-3, >and both appear to be the same drive. Since switching to zfs, my >Linux-disk-fu has become a bit rusty. Is one an alias for the other? The >Linux disk appears to top out at around 50MB/s or so. That looks suspiciously >like it is running on a gigabit connection with some problems. I agree that the zfs side looks like it has plenty of bandwidth and iops to spare. >From what I can see, you can narrow the search down to a few things: 1. Linux network stack 2. Linux iSCSI issues 3. Network cabling/switch between the devices 4. Nexenta CPU constraints (unlikely, I know, but let's be thorough) 5. Nexenta network stack 6. COMSTAR problems As another poster pointed out, testing some NFS and ssh traffic can eliminate 1, 3 and 5 above. I recommend going down the list and testing every piece in isolation as much as possible to narrow the list. Good luck and let us know what you learn. Cheers, Marty -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
