link() not increasing link count on NFS server
mcdouga9 at egr.msu.edu
Thu Nov 15 00:04:25 PST 2007
On Wed, Nov 14, 2007 at 11:45:50PM -0800, Kip Macy wrote:
On Nov 14, 2007 11:42 PM, Adam McDougall <mcdouga9 at egr.msu.edu> wrote:
> Hi, lately I've been trying to work out some NFS multiple access issues relating
> to the Dovecot IMAP server software. One symptom seems to be an unusual behavior
> of FreeBSD NFS clients that I cannot reproduce with Linux or Solaris NFS clients.
> Basically, Timo (cc'ed) came up with a small test case that seems to indicate
> sometimes a link() call can succeed while the link count of the file will not
> increase. If this is ran on two FreeBSD clients from the same NFS directory, you
> will occasionally see "link() succeeded, but link count=1". I've tried both a
> Netapp and a FreeBSD NFS server. I've tried FreeBSD 7_RELENG clients as well as
> FreeBSD 6.2-stable from this summer. I've ran it on 32bit and 64bit clients.
> I've turned rpc.lockd on and off, tried tcp vs. udp mounts, nothing so far seems
> to make a difference, except perhaps FreeBSD 7.0 seems to produce the error less
> often. If one of the processes is ran on a non-FreeBSD NFS cliemt, only the
> FreeBSD NFS client gives the link error. Anyone have any input? Thanks.
Is this with both TCP and UDP clients? We're planning on making the default TCP.
Yes, I saw no difference when using TCP vs UDP.
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