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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