[Dovecot] pop3_lock_session and NFS

[salimlist at sdv.fr]

Hello,

I need an advice about POP3 and NFS with Dovecot 1.0 (as 1.1 is still 
tagged beta) .

I currently have all messages and indexes under a NFS partition . I 
thus turned cache off using actimeo=0 .
Of course, my current architecture does not allow me to keep the same 
user on the same dovecot server.

Now, I have some NFS issues with high percentages of getattr() .
If I understood well, the cache must be disabled, because of the case 
of 2 differents computers could log on the same time and mess up the 
index file .

If I use the directive pop3_lock_session and enable it, that should 
block conccurent pop3 access using a lock file .
Can I consider it safe enough to turn on the NFS cache (ie removing 
actimeo=0) ?

Thanks in advance

Salim

Ps: For you info, we use dovecot here for a big cable broadband ISP, 
with 2,000,000 mailboxes using 30 dovecot POP3 servers,10 dovecot 
proxy servers and we are really happy with your nice software, we 
expect a lot from 1.1 .