[Dovecot] Dovecot,nfs or memory indexing

[Timo Sirainen]

On Aug 4, 2008, at 9:42 AM, Sebastian Tymków wrote:

> Hi,
>
> I wonder if it's normal behaviour that indexes created in memory  
> have long
> creation time.

No, but the problem has more to do with caching. If you use a client  
that fetches the same data often (such as message headers/sizes) then  
Dovecot will do the same work for each request. In that case in-memory  
indexes perform poorly. This is more of a problem with webmail clients  
and less of a problem with Outlook/Thunderbird.

If you're using POP3 that also performs poorly without indexes with  
v1.0. v1.1 makes it better.

> Other problem is that indexes created on nfs sometimes get crushed  
> and I
> need to delete indexes in case of
> fetching mails ( I see mails on hd but when telnet on host and make  
> stat I
> don't see any).

So Dovecot says there are no mails while there are in fact?

> Does version 1.1.x correct this errors ?

v1.1 makes NFS work a lot better, so it's highly recommended.

> And what is better to use : nfs or
> memory indexing ?
> Can someone point me adventages and disadventages of using both  
> solutions?

Have you read http://wiki.dovecot.org/NFS ?
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