[Dovecot] 1.0.rc16 released

[Timo Sirainen]

On 5.1.2007, at 21.47, Bill Cole wrote:

>> 	+ Added dotlock_use_excl setting. If enabled, dotlocks are created
>> 	  directly using O_EXCL flag, instead of by creating a temporary  
>> file
>> 	  which is hardlinked. O_EXCL is faster, but may not work with NFS.
>
>
> Can you expand on this?

The problem with HFS+ is that it implements hard links some weird way  
(http://www.dovecot.org/list/dovecot/2006-August/015287.html). I also  
noticed that besides having a bad performance, I ended up in a  
situation like this:

~/Maildir$ ls dovecot-uidlist.lock
dovecot-uidlist.lock
~/Maildir$ ls |grep dovecot-uidlist.lock
~/Maildir$ /bin/rm dovecot-uidlist.lock
rm: dovecot-uidlist.lock: No such file or directory

This made the maildir stuck forever until I just went and deleted the  
whole ~/Maildir.

> I have been running Dovecot on a MacOS 10.4 PPC machine with  
> Maildir on local (HFS+) disk for some time and have had  
> intermittent and hard-to-characterize problems that manifest  
> themselves as clients (Eudora, Palm VersaMail, and Outlook) timing  
> out and hanging as one tries to move messages between mailboxes in  
> the same account. The cargo-cult approach I've used to eliminate  
> the hangs has been unsatisfying (cycle all clients and Dovecot,  
> remove index files and temp files in mailbox directories) but even  
> with rawlogging I have been unable to nail down the source of the  
> trouble definitively. It looks like maybe bad index files or maybe  
> some sort of locking issue, but the logs don't show anything other  
> than the clients timing out and dropping connections.

You should see at least some "lock timeout" errors in logs if it's  
because of them.

> I don't understand the description of those rc16 changes because it  
> seems like dotlocking would be irrelevant for Maildir anyway.  
> Should I set dotlock_use_excl=yes even though I'm using fcntl?

Dotlocking is always used for some things. See if it helps for your  
problems :)
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