Date: Wed, 10 Feb 2010 21:46:53 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-hackers@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG, amdmi3@amdmi3.ru Subject: Re: NFS write corruption on 8.0-RELEASE Message-ID: <201002102046.o1AKkrvj085173@lurza.secnetix.de> In-Reply-To: <freebsd-hackers.77287.1265825437.20100210174338.GC39752@hades.panopticon>
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Dmitry Marakasov <amdmi3@amdmi3.ru> wrote:
> I think I've reported that before, the I thought it's been fixed,
> however I still get data corruptions when writing on NFS volumes.
> Now I wonder - is nobody really using NFS, or do I have that much
> of uncommon setup, or this is some kind of local problem?
NFS works fine for me. I'm using -stable, not -release,
though.
> Client: 8.0-RELEASE i386
> Server: 8.0-RELEASE amd64
>
> mount options:
> nfs rw,nosuid,noexec,nfsv3,intr,soft,tcp,bg,nolockd
I recommend not using the "soft" option.
This is an excerpt from Solaris' mount_nfs(1M) manpage:
File systems that are mounted read-write or that con-
tain executable files should always be mounted with
the hard option. Applications using soft mounted file
systems may incur unexpected I/O errors, file corrup-
tion, and unexpected program core dumps. The soft
option is not recommended.
FreeBSD's manual page doesn't contain such a warning, but
maybe it should. (It contains a warning not to use "soft"
with NFSv4, though, for different reasons.)
Also note that the "nolockd" option means that processes
on different clients won't see each other's locks. That
means that you will get corruption if they rely on
locking.
Best regards
Oliver
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