Date: Wed, 9 Feb 2005 13:52:43 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Tim Traver <tt-list@simplenet.com> Cc: questions@freebsd.org Subject: Re: NFS File Locking across multiple machines Message-ID: <20050209215243.GA13823@xor.obsecurity.org> In-Reply-To: <420A6586.1000302@simplenet.com>
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[-- Attachment #1 --] On Wed, Feb 09, 2005 at 11:33:26AM -0800, Tim Traver wrote: > Hi all, > > a couple of years back, we ran into a problem with the FreeBSD NFS code > where file locks were not seen by other machines. > > We use Netapp disk hardware to mount NFS filesystems to our FreeBSD > systems. In the past, two different machines would not recognize locks > from each other, and would sometimes cause file collisions. > > From the same machine, two different processes would recognize locks > without a problem. > > In our experience, the Sun servers that we had also did not have any > problems. This was after creating specific tests to make this determination. > > We reported it to the freebsd developers way back when, and have lost > track as to the status of the issue. > > Does anyone on this list know of the developer that was developing the > NFS code ??? or know anything about the issue ??? or have an answer ??? ;) > > I'd like to talk to him/her to see what the status is in the later > FreeBSD 4.x series as well as 5.x In 4.x and older rpc.lockd does not implement client-side locking. This is documented in the manpage. In 5.x and later rpc.lockd does do client-side locking. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFCCoYrWry0BWjoQKURAkvyAJ9aBK2rBszpJUZoLnfp+yzNqr9UrwCg62u7 QITU04X5ylFVA0TDvVy0F2Y= =i/x/ -----END PGP SIGNATURE-----help
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