From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Gregory Giguashvili <Gregoryg@ParadigmGeo.com>
Cc: "'trond.myklebust@fys.uio.no'" <trond.myklebust@fys.uio.no>,
"Linux Kernel (E-mail)" <linux-kernel@vger.kernel.org>
Subject: RE: O_SYNC option doesn't work (2.4.18-3)
Date: 07 Aug 2002 22:55:30 +0100 [thread overview]
Message-ID: <1028757330.26935.3.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <EE83E551E08D1D43AD52D50B9F511092E114E3@ntserver2>
On Wed, 2002-08-07 at 20:24, Gregory Giguashvili wrote:
> I understand that locking file flushes NFS cache, isn't it? Why can't it be
> flushed by O_SYNC and "sync" options presence? This would make the life much
> easier for programmers...
>
> This means that we will never be able to drop lockd locking and at the same
> time achieve file consistency via NFS?
Welcome to NFS. You basically need file locking (lockf/posix - flock is
not portably applicable to NFS) and you may need to turn off attribute
caching to make O_APPEND work portably.
Its a pain, but NFS has no other way to infer your transaction
constraints. You need to lock for read and for write on all clients, a
client reading without locking may get stale data.
Personally I use my own little daemons to manage transactional data,
ones that understand my transaction rules
next prev parent reply other threads:[~2002-08-07 20:32 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-07 19:24 Gregory Giguashvili
2002-08-07 19:38 ` Trond Myklebust
2002-08-07 21:55 ` Alan Cox [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-08-08 14:57 Gregory Giguashvili
2002-08-08 15:37 ` Daniel Forrest
2002-08-08 13:48 Jesse Pollard
[not found] <fa.jepn5rv.uiqrqe@ifi.uio.no>
[not found] ` <fa.gkqj0av.c661ad@ifi.uio.no>
2002-08-08 7:11 ` Giacomo Catenazzi
2002-08-08 8:06 ` Willy Tarreau
2002-08-08 12:36 ` Alan Cox
2002-08-07 20:48 Jesse Pollard
2002-08-08 10:07 ` Martin Brulisauer
2002-08-07 19:30 Gregory Giguashvili
2002-08-08 13:42 ` Trond Myklebust
2002-08-07 18:54 Gregory Giguashvili
2002-08-07 18:13 ` Trond Myklebust
2002-08-07 18:39 Gregory Giguashvili
2002-08-07 17:43 ` Trond Myklebust
2002-08-07 18:15 Jesse Pollard
2002-08-07 17:31 Gregory Giguashvili
2002-08-07 17:19 ` Trond Myklebust
2002-08-07 17:24 Gregory Giguashvili
2002-08-07 16:31 ` Trond Myklebust
2002-08-07 17:17 Gregory Giguashvili
2002-08-07 16:24 ` Trond Myklebust
2002-08-07 20:20 ` Benjamin LaHaise
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