Hello Ben, Monday, February 5, 2007, 9:17:01 AM, you wrote:
BR> I've been playing with replication of a ZFS Zpool using the BR> recently released AVS. I'm pleased with things, but just BR> replicating the data is only part of the problem. The big BR> question is: can I have a zpool open in 2 places? BR> What I really want is a Zpool on node1 open and writable BR> (production storage) and a replicated to node2 where its open for BR> read-only access (standby storage). BR> This is an old problem. I'm not sure its remotely possible. Its BR> bad enough with UFS, but ZFS maintains a hell of a lot more BR> meta-data. How is node2 supposed to know that a snapshot has been BR> created for instance. With UFS you can at least get by some of BR> these problems using directio, but thats not an option with a zpool. BR> I know this is a fairly remedial issue to bring up... but if I BR> think about what I want Thumper-to-Thumper replication to look BR> like, I want 2 usable storage systems. As I see it now the BR> secondary storage (node2) is useless untill you break replication BR> and import the pool, do your thing, and then re-sync storage to re-enable replication. BR> Am I missing something? I'm hoping there is an option I'm not aware of. You can't mount rw on one node and ro on another (not to mention that zfs doesn't offer you to import RO pools right now). You can mount the same file system like UFS in RO on both nodes but not ZFS (no ro import). I belive what you really need is 'zfs send continuos' feature. We are developing something like this right now. I expect we can give more details really soon now. -- Best regards, Robert mailto:[EMAIL PROTECTED] http://milek.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
