It is true that maildir was designed to be used over NFS, but I would like to
know how many people are using the maildir++ extension (maildirquotas) on nfs
in a production environment..
The reason why I ask is because I have been trying to debug a possible race
condition with nfs when messages are added to a maildir and not added to
maildirsize file. The problem doesn't occur very often but exposes itself
after a while when those messages are deleted, and thus subtracted from the
quota when they were never added, eventually yielding a negative quota.
For some reasons maildrop was not rebuilding those files (or at least not for
a few days) so I had to manually rebuild them.
The tool I used to rebuild the quotas for all accounts is vuserinfo from
vpopmail which shares (almost) the same maildirquota code from courier.
>From the latest README.maildirquota.txt (comes with maildrop-1.6.2)
The current implementation of Maildir++ in Courier inserts whitespace
padding on each line so that each line (including the terminating \n)
is 14 bytes in size. This minimizes the impact of appending-related
bugs in some NFS implementations.
daemon1# rm Maildir/maildirsize
daemon1# maildirmake -q 10000000S Maildir/
daemon1# cat Maildir/maildirsize
10000000S
0 0
daemon1# rm Maildir/maildirsize
daemon1# ~vpopmail/bin/vuserinfo [EMAIL PROTECTED]
[vuserinfo provides some info for that user and recalculates the quota as is
set in the quota column in the mysql db]
daemon1# cat Maildir/maildirsize
10000000S
0 0
I am still looking in the code (maildirquota.*) in maildrop/maildir/ to find
out how this padding is done.
If you can point me to it, please let me know..
Respectfully,
Tim Hasson
Quoting Martin Lohmeier <[EMAIL PROTECTED]>:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On Sunday 05 October 2003 22:31, Chris Masters wrote:
> > Hi all,
> >
> > Has anyone experienced any problems with
> > courier-maildrop or courier-imap with maildirs located
> > on an NFS mount?
>
> As far as I know, maildir is designed to be used over NFS. Have a look at
> http://www.qmail.org/man/man5/maildir.html and http://cr.yp.to/proto/
> maildir.html
>
> by, Martin
> - --
> public key available from
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>
> Powerd by Debian GNU / Linux
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> =gday
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