Hi Matt Are the seeing low speeds on writes only or on both read AND write?
Are you seeing low speed just with iSCSI or also with NFS or CIFS? > I've tried updating to COMSTAR > (although I'm not certain that I'm actually using it) To check, do this: # svcs -a | grep iscsi If 'svc:/system/iscsitgt:default' is online, you are using the old & mature 'user mode' iscsi target. If 'svc:/network/iscsi/target:default' is online, then you are using the new 'kernel mode' comstar iscsi target. For another good way to monitor disk i/o, try: # iostat -xndz 1 http://docs.sun.com/app/docs/doc/819-2240/iostat-1m?a=view Don't just assume that your Ethernet & IP & TCP layer are performing to the optimum - check it. I often use 'iperf' or 'netperf' to do this: http://blogs.sun.com/observatory/entry/netperf (Iperf is available by installing the SUNWiperf package. A package for netperf is in the contrib repository.) The last time I checked, the default values used in the OpenSolaris TCP stack are not optimum for Gigabit speed, and need to be adjusted. Here is some advice, I found with Google, but there are others: http://serverfault.com/questions/13190/what-are-good-speeds-for-iscsi-and-nfs-over-1gb-ethernet BTW, what sort of network card are you using, as this can make a difference. Regards Nigel Smith -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
