On Mon, 2011-06-27 at 11:40 -0700, Daniel L. Miller wrote:
Maybe a little off-topic - but I hope not too much.
Looking for some insight on setting up Dovecot under a virtual server.
In particular, I use VirtualBox - and at the moment, Ubuntu Linux.
I hope this is a lightly used server and does not do any real level of mail traffic else you'll soon regret running in any VM :)
format. I wish to continue storing the mail on "raw" disks - not place the mail inside a virtual disk. Accordingly, the VM needs to reach the
At least you have very good sense not to do that
means NFS. My initial testing shows NFS results in a dramatically reduced performance for Dovecot. Given that this NFS access is going to
Hrmmm, something amiss somewhere then, I'd put it down to the VM, many people on this list use NFS and have no problems.
there any NFS or Dovecot tweaks I should implement? Is there an
Though you have not mentioned what version you run, on 1.2.x using:
mmap_disable = yes mail_nfs_storage = yes mail_nfs_index = yes
... is a must...
Also, what else runs on your server, how many VM's and what types? The only VM I use, is personal and not work related, and then its only for my personal domain secondary MX and secondary geo located (in the U.S) DNS, it's a Xen box, but it does little work since my primaries always respond, I set it up to NFS access my mail here once playing around (seeing how much a difference being 10K Km's away makes), and the only latency I got in accessing mail, was normal and as to be expected with a 160ms each way trip, to be honest, it was faster to pop my mail that way, than using my mobile directly to my main server given mobile carriers always over subscribe.
Cheers
