-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 11/11/10 17:57, Chad Leigh -- Shire.Net LLC wrote: > > I will be setting up a NexentaStor Community Edition based ZFS file > server. I will be serving some zvols over iSCSI to some FreeBSD > machines to host jails in. > > 1) The ZFS box offers a single iSCSI target that exposes all the > zvols as individual disks. When the FreeBSD initiator finds it, it > creates a separate disk for each zvol. I assume if I have multiple > FreeBSD machines connecting to this iSCSI target, as long as no > individual zvol is mounted on more than 1 FreeBSD machine, the fact > that a disk "exists" for each zvol on each FreeBSD machine is > irrelevant and won't cause problems
This is correct. > 2) I am thinking about formatting the virtual disks served from the > Nexenta iSCSI target as ZFS on the FreeBSD machine even though it has > no redundancy. I see this as safe since the backing store on the > Nexenta machine is a redundant based ZFS zvol... Is this correct > thinking? Speaking for redundancy, I don't think there is much point adding redundancy at client side when you already have at the iSCSI target. However, it makes me to feel a bit nervous since the added transmission chains (iSCSI stack, TCP/IP stack, network driver, network card, ethernet cable, switch, then vice versa) could increase the risk of introducing data errors during transmission (note that iSCSI uses TCP which do have built in checksuming so the likelihood is very low, though). Cheers, - -- Xin LI <delp...@delphij.net> http://www.delphij.net/ FreeBSD - The Power to Serve! Live free or die -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (FreeBSD) iQEcBAEBCAAGBQJM3KP/AAoJEATO+BI/yjfB2uEIAK8zADbsEpyRelgRBJnelBT+ P4EbBIfexWxy29RXoqWwcXi7tOr1UqpaeqzgqfhJmz0kX42by4CYS6rPIffaaZVq yUZ8TItUXo1v2TK3k/S3XBlEdDO4A4bHrVgv/+ylqx+VyNPun7wtbHgKgb2ZANbr +PWevIm4QOPHDApnznbeigTSCqVwIC31G2M8pFseDZufV/aKWnYYG4G1AtXi1vDq ABELVQz23HgFTaFnNqrFrCYKU0oGi2ff2TDE84t2apoqxvfp+esbDxBI2BKt14DQ m14lBdPvxE0nEWcPtm1ica5Lc45GZKPYHyNrL1h6KeAq8CNQC90CKYMMZ0+mtsA= =VvvJ -----END PGP SIGNATURE----- _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
