Forrest Aldrich wrote:
I've seen this product mentioned before - the problem is, we use Veritas heavily on a public network and adding yet another software dependency would be a hard sell. :(
Be very certain that you need synchronous replication before you do this. For some ACID systems it really is required. And, sadly, it's also required for rebootless client NFS failover (devs, will we ever get a zfs send/recv + nfs server that can preserver nfs file handles?)
For most use cases async replication is just fine, and is far less fragile (block level replication happily replicates corruption). At $office we have 2 systems replicating on SRDF, everything else is async replication via NetApp SnapMirror or ZFS send/recv.
To answer your original question, no, you can't yet shrink a pool (it's been coming Real Soon Now for a couple of years - no clue how much longer before it actually arrives). So you'd need enough temporary storage to replicate your data while you destroy and re-create your pool.
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