[Dovecot] NFS performance and 1.1.3 - what can you (unofficially) get away with?

2008-09-10 Thread Jack Stewart
Hi, Does anyone have experience with bending the NFS recommendations to get better performance? The question is has anyone, with Maildir and the INDEX= on NFS (i.e. dovecot.index and dovecot.index.cache, set mail_nfs_index to no. If so, was it better to turn maildir_copy_preserve_filename

Re: [Dovecot] NFS performance and 1.1.3 - what can you (unofficially) get away with?

2008-09-10 Thread Timo Sirainen
On Wed, 2008-09-10 at 10:58 -0700, Jack Stewart wrote: The question is has anyone, with Maildir and the INDEX= on NFS (i.e. dovecot.index and dovecot.index.cache, set mail_nfs_index to no. How much worse is the mail_nfs_index=yes? Last I heard it made hardly a difference. If so, was it

Re: [Dovecot] NFS performance and 1.1.3 - what can you (unofficially) get away with?

2008-09-10 Thread Rick Romero
Timo Sirainen wrote: I figure that the worst that can happen is that the dovecot.index.cache file will become corrupt, and dovecot will then rebuild it. It's not the worst that can happen, but index file errors are probably more likely than other errors.. I concur! I currently

Re: [Dovecot] NFS performance and 1.1.3 - what can you (unofficially) get away with?

2008-09-10 Thread Jack Stewart
The performance hit was bad. When I tried mail_nfs_index = yes the load went from 0.5 to 120+ (on each of three servers). My RPM of 1.1.3 includes the Redhat patches from their source RPM for 1.0.7. I'm checking the patches now and most seem benign but there is some mbox locking changes.

Re: [Dovecot] NFS performance and 1.1.3 - what can you (unofficially) get away with?

2008-09-10 Thread Timo Sirainen
On Wed, 2008-09-10 at 12:20 -0700, Jack Stewart wrote: The performance hit was bad. When I tried mail_nfs_index = yes the load went from 0.5 to 120+ (on each of three servers). It shouldn't have been anything that bad. I could send you some patches that reduce what mail_nfs_index=yes does. It

Re: [Dovecot] NFS performance and 1.1.3 - what can you (unofficially) get away with?

2008-09-10 Thread Jack Stewart
Thanks. I would like to give the patches a try. I've removed all of the redhat patches except for the one that tells dovecot where to find the certs (why does redhat use pki? why?) but I haven't installed this version yet. Are there any build/configure twiddles that might help? Just as an