[Dovecot] Well, "Hard filesystem quota can also be problematic"

[Jeroen Scheerder]

Alan Premselaar wrote:
> Jeroen Scheerder wrote:
> 
>>
>> Can anyone tell me whether or not there is, or will be, some way of 
>> using dovecot on a system with quota without risk of data loss when 
>> quota limits are reached?  How do people cope with this?
>>
> 
> I use Dovecot 0.9.14 with disk quotas.
> 
> I use maildir format however.  you can't expect to use mbox format and 
> not get data loss/corruption when you hit a filesystem quota.  I've 
> fairly certain that even UW-IMAP will corrupt your mbox files in the 
> case of exceeding your quota as well.
> 
> so, with the maildir storage format, procmail and mimedefang rules to 
> reject mail for users that are over-quota, and dovecot configured to 
> store indexes and control files on a non-quota'd filesystem, I've got a 
> successful installation with filesystem quotas.

Thanks, that's insightful.  I'lll probably add a quota checker to my procmail 
setup, and configure the indexes to get stored in a tmp dir sans quota.  What 
are these control files?  I've not seen them appear in any dovecot config file...