On Mon, Apr 07, 2008 at 01:06:34AM -0700, Ross wrote: > > To repeat what some others have said, yes, Solaris seems to handle > an iSCSI device going offline in that it doesn't panick and > continues working once everything has timed out. > > However that doesn't necessarily mean it's ready for production use. > ZFS will hang for 3 mins (180 seconds) waiting for the iSCSI client > to timeout. Now I don't know about you, but HA to me doesn't mean > "Highly Available, but with occasional 3 minute breaks". Most of > the client applications we would want to run on ZFS would be broken > with a 3 minute delay returning data, and this was enough for us to > give up on ZFS over iSCSI for now.
Doesn't this also happen with UFS on an Iscsi device? Iscsi is just local disk. What would happen if a physical disk went offline? We like the 3-minute delay because it gives us time to reboot the Netapp that provides storage on our Iscsi SAN without having to shut down all of the applications. Something has to happen when a disk goes offline. We also use Solaris multipathing with two independant network paths to the Netapp so that a network won't break Iscsi. -- -Gary Mills- -Unix Support- -U of M Academic Computing and Networking- _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
