On Thu, Jun 29, 2000 at 12:55:56PM -0700, Ihnen, David wrote:
> This prompted a bit of research. Why didn't it work? My boss wanted
> to know too. I found a message on this list where a man states that
> qmail queues cannot be located over NFS.
>
> My question is Why? they use maildir, so they don't need locking,
> right? Be technical, I may have to explain this to my boss.
You're confusing 1) user mail storage (Maildir), with 2) the qmail
queue structure.
Maildir is the storage format for final delivery, and is well suited
to being on NFS.
The qmail queue structure is not much like a Maildir, and is for
intermediate storage of a message while waiting on final delivery.
The qmail queue cannot be stored on NFS as it 1) requires exclusive
access, 2) names files after disk inodes. A good document to read
about would be INTERNALS.
> And if I can't put the queues there, is there a way to stored
> deferred messages there, so we can recover from a relay server
> explosion without losing already deferred messages?
Just put your entire queue on a RAID partition. Just give yourself
enough of a budget to have good IO speed on that RAID partiiton.
I'll say it again, RAID 10.
John
