My mentor told me: "get everything wrong, but get the backups right", as he was busy debugging the backup solution he had in place at my college (ZFS + NetApp + rsync + sh + perl + tape).
On my own, I'd put CoW wherever possible. It's so easy to delete something on UNIX that it should also be easy to restore and CoW is without a doubt a no-brainer for this.
On my own, I'd put CoW wherever possible. It's so easy to delete something on UNIX that it should also be easy to restore and CoW is without a doubt a no-brainer for this.