Date: Fri, 17 Aug 2007 13:18:12 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Dag-Erling Sm??rgrav <des@des.no> Cc: current@freebsd.org, mohans@freebsd.org Subject: Re: NFS hangs Message-ID: <20070817111812.GB9640@garage.freebsd.pl> In-Reply-To: <86bqd6ifjk.fsf@ds4.des.no> References: <20070814165423.ebuvjb6dwswkgc8g@webmail.leidinger.net> <20070814153519.GA18648@rot26.obsecurity.org> <86643h3isp.fsf@ds4.des.no> <20070814213515.GA23492@rot26.obsecurity.org> <86d4xp21i3.fsf@ds4.des.no> <86lkccorig.fsf@ds4.des.no> <86tzqz5ia2.fsf@ds4.des.no> <86k5rv5eeg.fsf_-_@ds4.des.no> <20070817105604.GA9640@garage.freebsd.pl> <86bqd6ifjk.fsf@ds4.des.no>
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--1UWUbFP1cBYEclgG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Aug 17, 2007 at 01:09:03PM +0200, Dag-Erling Sm??rgrav wrote: > Pawel Jakub Dawidek <pjd@FreeBSD.org> writes: > > Dag-Erling Sm??rgrav <des@des.no> writes: > > > Starting to think it might be a server issue after all. The server r= uns > > > 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 th= at > > > 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. >=20 > 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. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --1UWUbFP1cBYEclgG Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFGxYP0ForvXbEpPzQRAkN1AJ9Tpf84Yhkt/0jISCIjV6ZvthJQpACgxFau sq+hpVmHQP7vlQ7vODjddIg= =9RQO -----END PGP SIGNATURE----- --1UWUbFP1cBYEclgG--
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