I've been playing with replication of a ZFS Zpool using the recently released AVS. I'm pleased with things, but just replicating the data is only part of the problem. The big question is: can I have a zpool open in 2 places?
What I really want is a Zpool on node1 open and writable (production storage) and a replicated to node2 where its open for read-only access (standby storage). This is an old problem. I'm not sure its remotely possible. Its bad enough with UFS, but ZFS maintains a hell of a lot more meta-data. How is node2 supposed to know that a snapshot has been created for instance. With UFS you can at least get by some of these problems using directio, but thats not an option with a zpool. I know this is a fairly remedial issue to bring up... but if I think about what I want Thumper-to-Thumper replication to look like, I want 2 usable storage systems. As I see it now the secondary storage (node2) is useless untill you break replication and import the pool, do your thing, and then re-sync storage to re-enable replication. Am I missing something? I'm hoping there is an option I'm not aware of. benr. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
