So I'm in the process of building a ZFS based SAN. After toying with it at home I've ordered up all the parts to begin my build. That's a completely different story though.
I'm wondering what the possibilities of two-way replication are for a ZFS storage pool. The scenario - the ZFS SAN will be used as an NFS mount (hopefully) for Virtul Machine storage over Infiniband. What I'd like to be able to do is replicate this to a second datacenter with the ability to fail over to the second datacenter. I'm well aware of being able to ship snapshots over SSH, and I think I've got a big enough datacenter link that I could do this to the second datacenter without much problem. The concern comes in as soon as I initiate a failover. Once I fail to the second system, all changes are going to the second system, while the primary system is offline/unavailable. When the primary system comes back online, the secondary system will not really have (to my knowledge) any idea what state the primary system is in. Is there a way to then push any changes made locally on the second system back to the primary system without doing a full replication? Most of the cutover can be handled manually, and the second system could live in an "offline" state where the data isn't writeable until I tell it to be. 20-30 minutes of downtime while I power up VM's is acceptable. My biggest concern is that when the primary system comes back online that I don't have to push 20TB+ back to the primary system, especially if it was only offline for 2 hours. I've looked in to the HA Cluster, but for some reason my login information won't allow me to look at it currently. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
