I'm trying to share maildir directories with NFS from a backend file 
server to distribute load on a couple frontend pop/smtp boxes. In my 
first tests, everything works ok at the moment with vpopmail, 
qmail-pop3d and courier-imapd managing remotely exported mailboxes, but 
I get a nfs-related locking error when trying to add/edit user accounts, 
changinng passwords, quotas, etc.

vpopmail tools complaint with non-NFS related error messages, but when 
running them thru strace, I find a timeout while trying to lock vusers 
cdb files. NFS client boxes are linux, server is a netapp.com filer, nfs 
mount options are the defaults (got error when trying to switch to 
tcp-based nfs), and lockd service is enabled.

I know this is not directly related to vpopmail, but what nfs settings 
are appropiate for this purpose?


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