Re: sa-learn from a remote imap folder

2014-09-13 Thread Jari Fredriksson 
13.09.2014, 08:57, Dave Pooser kirjoitti:
 Dave At $DAYJOB we export the spam folder (and a ham folder for FPs)
 Dave via NFS and mount them on the frontline SA servers for sa-learn.

 Doesn't that smell of locking issues?
 To be honest, I'd just assumed that NFS wouldn't do any locking on a
 read-only export. I haven't seen any issues yet, but we're talking small
 volume, and the frontline servers mount the directories periodically, run
 the sa-learn, and then unmount them again.

 ...Great, now I'm paranoid. Thanks, Ian. ;-) I guess I can go back and
 force the exports to ne NFS3 instead of NFS4 so I can explicitly state the
 nolocks option

I have my Maildir on a NAS via NFS, but that is only a one user system
anyway.

-- 
jarif.bit




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Re: sa-learn from a remote imap folder

2014-09-13 Thread Bob Proulx 
Dave Pooser wrote:
 Dave At $DAYJOB we export the spam folder (and a ham folder for FPs)
 Dave via NFS and mount them on the frontline SA servers for sa-learn.
 
 Doesn't that smell of locking issues?
 
 To be honest, I'd just assumed that NFS wouldn't do any locking on a
 read-only export.

If you are using Maildir format then there are no locks.  That makes
Maildir format the format of choice for use over NFS.  Here is a
reference.

  http://www.postfix.org/NFS_README.html
  The maildir format uses one file per message and needs no file
  locking support in Postfix or in other mail software.

 ...Great, now I'm paranoid. Thanks, Ian. ;-) I guess I can go back and
 force the exports to ne NFS3 instead of NFS4 so I can explicitly state the
 nolocks option

Paranoia is good.  But using Maildir format would also be okay too.

Bob

Re: sa-learn from a remote imap folder

2014-09-13 Thread Dave Pooser 
On 9/13/14 1:38 PM, Bob Proulx b...@proulx.com wrote:

If you are using Maildir format then there are no locks.  That makes
Maildir format the format of choice for use over NFS.

Excellent. I am in fact using Maildir, so I guess it's not just luck that
I've had no locking issues.

Thanks, Ian, for the warning and thanks, Bob, for setting my mind at ease.
;-) 
-- 
Dave Pooser
Cat-Herder-in-Chief, Pooserville.com