NFS hangs

[Pawel Jakub Dawidek]

On Fri, Aug 17, 2007 at 01:09:03PM +0200, Dag-Erling Sm??rgrav wrote:
> Pawel Jakub Dawidek <pjd at FreeBSD.org> writes:
> > Dag-Erling Sm??rgrav <des at des.no> writes:
> > > Starting to think it might be a server issue after all.  The server runs
> > > CURRENT from 2007-08-03.  All exported file systems are ZFS; should I
> > > try to disable the ZIL?  That's the one part of ZFS I can think of that
> > > would interact with NFS in a way other file systems don't.
> > I can't see how ZIL can make any difference visible for NFS clients,
> > except when your NFS server crashes. Although I'd keep ZFS on suspects
> > list, as exporting ZFS file systems over NFS wasn't really heavily
> > tested.
> 
> As I understand it, write operations pass through the ZIL to maintain
> consistency?

No consistency - ZFS is always consistent on disk, but without ZIL, for
example fsync(2) is a no-op, which may confuse NFS clients in an event
of NFS server crash.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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