On Jan 22, 2010, at 9:22 PM, Frank Cusack wrote:
but I wonder if anyone here is running lots of Maildirs on zfs?
When you say "lots of Maildirs" I assume you mean filesystem-per-user? You can of course use "lots of Maildirs" yet have only a single zfs filesystem but that doesn't seem to me to be worth questioning.
I am running that way but it's less than 100 users so probably not
what you would consider "lots".
I'm in the same usage range for my ZFS-backed mail server.
I'd seen some comments here in the past that zfs+maildirs = bad.
I can't imagine why that would be the case. There are some problem loads for zfs (zfs-backed NFS writes, e.g.) but why maildir would be particularly singled out I wouldn't know.
I'm doing everything on ZFS now (database loads, web services,
etc) and will never go back to UFS. (or ext3, etc) Zero problems,
with anything, ever.
For filesystem-per-user, if by "lots" you mean 1000 or 1000s then you have the problem that it takes forever to mount all of those
filesytems on reboot. That's not a maildir-specific problem though.
I'm running filesystem-per-domain; I've found that's a good way to
do it for my situation.
-Dave-- Dave McGuire Port Charlotte, FL