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

[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 run one backend NFS server with Dovecot 
installed on it.  In the process of testing adding another dovecot 
front-end server, mounting homedirs via NFS, I managed to delete my 
entire Inbox!    

How?   Dovecot on box1 was using local access, and box2 was using NFS.  
I connected to the same account via both dovecots (imap) at the same 
time.  On box 2 I read my mail and deleted a couple just fine. Then went 
back to box 1, deleted another and the expunge wiped everything out.

Lucky for me I do zfs snapshots nightly and this was right away in the 
morning.

I now have a local NFS mount on box1 to allow for box2 (It's FreeBSD, so 
it still doesn't work right, but at least it errors out 'gracefully' now).

Rick