[Dovecot] Remote storage

Daniel L. Miller dmiller at amfes.com
Sun Mar 1 23:48:39 EET 2009

Daniel L. Miller wrote:
> What options are available for remote storage, i.e. storage devices 
> directly mounted on the machine running Dovecot?  I've seen 
> discussions of NFS usage - but my experiences with NFS in times past 
> have been poor.  CIFS has worked well for me for non-mail use - would 
> this be suitable?  Or is there another method I've not considered?
I'm actually trying it - and at first glance it's functional.  I'm using 
the following mount parameters:

-o user=vmail%vmail,rw,serverino,directio

I'm using Dovecot 1.1.11 (from Ubuntu Jaunty).  Also Postfix, LDAP, and 
a few other odds & ends.  While message delivery is working (using 
deliver), I do see the following in my logs:

Mar  1 13:35:09 mailserver postfix/pickup[21464]: 5FAFC2A002: uid=0 
Mar  1 13:35:09 mailserver postfix/cleanup[21526]: 5FAFC2A002: 
message-id=<20090301213509.5FAFC2A002 at mailserver.amfeslan.local>
Mar  1 13:35:09 mailserver postfix/qmgr[21429]: 5FAFC2A002: 
from=<root at mailserver.amfeslan.local>, size=367, nrcpt=1 (queue active)
Mar  1 13:35:09 mailserver dovecot: auth(default): master in: 
USER^I1^Idmiller at amfes.com^Iservice=deliver
Mar  1 13:35:09 mailserver dovecot: auth(default): master out: 
USER^I1^Idmiller at amfes.com^Iuid=5000^Igid=8^Ihome=/var/mail/amfes.com/dmiller^Imail=dbox:/var/mail/amfes.com/dmiller/Maildir
Mar  1 13:35:10 mailserver deliver(dmiller at amfes.com): 
failed: Invalid argument
Mar  1 13:35:10 mailserver deliver(dmiller at amfes.com): 
msgid=<20090301213509.5FAFC2A002 at mailserver.amfeslan.local>: saved mail 
Mar  1 13:35:10 mailserver postfix/pipe[21528]: 5FAFC2A002: 
to=<dmiller at amfes.com>, relay=dovecot, delay=1.1, delays=0.07/0.01/0/1, 
dsn=2.0.0, status=sent (delivered via dovecot service)
Mar  1 13:35:10 mailserver postfix/qmgr[21429]: 5FAFC2A002: removed

That error from deliver with "fdatasync_path" bothers me - what does 
that indicate, and where should I go to fix it?  Based on mmap errors, I 
already set "mmap_disable = yes"

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