Date: Sun, 15 Jul 2001 21:45:38 -0700 From: Arun Sharma <arun@sharmas.dhs.org> To: Dan Nelson <dnelson@emsphone.com> Cc: questions@FreeBSD.ORG Subject: Re: NFS mount Linux Mandrake 8.0 -> FreeBSD 4.3-STABLE hang Message-ID: <20010715214538.A20260@sharmas.dhs.org> In-Reply-To: <20010715220415.A3289@dan.emsphone.com>; from dnelson@emsphone.com on Sun, Jul 15, 2001 at 10:04:15PM -0500 References: <20010715200102.A19948@sharmas.dhs.org> <20010715220415.A3289@dan.emsphone.com>
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On Sun, Jul 15, 2001 at 10:04:15PM -0500, Dan Nelson wrote: > In the last episode (Jul 15), Arun Sharma said: > > I use amd to NFS mount /net/<linux-box>/foo > > > > and then try: > > > > $ cp /net/*/foo/bar to /tmp > > > > For small files, it works ok. For anything larger than a few kilobytes, > > cp hangs. So does any command that does any directory operations on > > /tmp. > > Try tcpdumping both machines. NFS prefers to use 8K data packets, so > if you've got a broken router inbetween the two boxes, the packets may > get dropped instead of fragmented. Going to TCP NFS mounts will fix > it, if that is the problem. Actually, I figured out that the cp doesn't hang, but takes a *long* time - longer than it takes to transfer the file via scp over the same interface. tcpdump shows that NFS is using 8kb block size, but packets get fragmented because I'm on a wireless network with a MTU < 2k. -Arun To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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