On Tue, 2006-05-30 at 10:30 -0700, Tatjana S Heuser wrote: > > SunCluster will support ZFS in our 3.2 release of SunCluster, > > via the HAStoragePlus resource type. This support will be for > > failover use only, not scaleable or active-active applications. > > What about quorum reservation in ZFS storage pools. > AFAIK ZFS does not support SCSI3 persistent group reservation (PGR) > Will that be emulated? As also done on SCSI2 with PGRE ?
Reservations work at a lower level than ZFS. In the case that a LUN was reserved away from ZFS, it would appear as an error. Since we implement failfast in the SCSI driver, the fenced node will panic. For quorum, ZFS will never see the reservation. > Why is there no storage communication via the ORB as we had it in > SunCluster 3.1 with SDS or Veritas since global storage actually is a > virtual layer above the raid sw layer. Why doesn't that work with ZFS. > Any information/clues? The limitations mentioned do sound strange to me. > Is it planned to have the cluster fs or proxy fs layer between the ZFS layer > and the Storage pool layer? I can't speak for Sun Cluster engineering, but the use of the HAStoragePlus resource type is much more common today than pxfs/GFS. Also, there was a discussion a few months ago on this forum about requirements for a distributed ZFS. If you have requirements, now is the time to make them known. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss