David - ZFS Backups

Thank you very much for the informative show.  It keeps me coming back each week and has me utilizing FreeBSD again after years of moving toward Linux.  I'm particularly impressed with the power of ZFS and feel much more comfortable with its maturity in FreeBSD rather than looking much into ZFS on Linux at this point.

We've been taking advantage of frequent snapshots and have been replicating them to other units offsite.  We have been setting the retention on these snapshots to 3 weeks.  I've heard Allan comment a number of times that multiple copies aren't backups because you don't have versions over a span of time. Would you consider the use of snapshots and remote replication to be sufficient for limited backup (only a few weeks of retention) or would you believe that it requires something more along the lines of Bacula to be considered as legitimate backup?  The use case is primarily backing up VM drives stored on NFS shares and some config and user files.

Thanks again for the great show,
David