dovecot - Jan 2006 - Locking strategy?

Hello!

I run the following environment:
UW imapd
pine
sendmail
procmail
mbox format

I migrated from UW imapd to dovecot. It is pretty faster than UW imapd.
To ensure a compatible environment I did the following configuration 
changes in /etc/dovecot.conf:

protocols = imaps

default_mail_env = mbox:~:INBOX=/var/mail/%u

mail_full_filesystem_access = yes

mbox_read_locks = fcntl
mbox_write_locks = fcntl

But I don't think that locking works well. In pine I get the following 
error messages:
Unexpected changes to folder (try restarting)

Also when I delete a file in the imap inbox I can't see that immediatly in 
pine (even when I restart pine the message is still there with a
"Deleted"
flag.

With UW imapd locking worked perfectly but performance was very bad.

What is the best configuration in a dovecot/pine/sendmail/procmail/mbox 
format environment.

Thank you for the answer.

Ciao,
Gerhard

On Sat, 2006-01-14 at 13:54 +0100, Gerhard Wiesinger
wrote:
> But I don't think that locking works well. In pine I get the following 
> error messages:
> Unexpected changes to folder (try restarting)
Why do you let Pine use the mbox files directly instead of going through
IMAP? That'll probably give you faster mailbox opening times as well.

UW-IMAP and Pine used their own locking in /tmp also, and whenever one
of them tried to access a mailbox the other one was using, the other one
is sent a signal which kills it (or closes the mailbox in Pine
probably). Dovecot doesn't try to do any of this, so you'll get the
error.
> Also when I delete a file in the imap inbox I can't see that immediatly
in
> pine (even when I restart pine the message is still there with a
"Deleted"
> flag.
Setting mbox_lazy_writes=no fixes this, but makes the performance
somewhat worse.

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