From owner-freebsd-fs@FreeBSD.ORG Sat Feb 27 21:43:37 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A47A0106566C; Sat, 27 Feb 2010 21:43:37 +0000 (UTC) (envelope-from gerrit@pmp.uni-hannover.de) Received: from mrelay1.uni-hannover.de (mrelay1.uni-hannover.de [130.75.2.106]) by mx1.freebsd.org (Postfix) with ESMTP id 29BD48FC12; Sat, 27 Feb 2010 21:43:36 +0000 (UTC) Received: from www.pmp.uni-hannover.de (www.pmp.uni-hannover.de [130.75.117.2]) by mrelay1.uni-hannover.de (8.14.2/8.14.2) with ESMTP id o1RLhXwC031167; Sat, 27 Feb 2010 22:43:34 +0100 Received: from pmp.uni-hannover.de (theq.pmp.uni-hannover.de [130.75.117.4]) by www.pmp.uni-hannover.de (Postfix) with SMTP id 9F56324; Sat, 27 Feb 2010 22:43:33 +0100 (CET) Date: Sat, 27 Feb 2010 22:43:33 +0100 From: Gerrit =?ISO-8859-1?Q?K=FChn?= To: Jeremy Chadwick Message-Id: <20100227224333.5bee38ac.gerrit@pmp.uni-hannover.de> In-Reply-To: <20100227193819.GA60576@icarus.home.lan> References: <20100226141754.86ae5a3f.gerrit@pmp.uni-hannover.de> <20100226174021.8feadad9.gerrit@pmp.uni-hannover.de> <20100226224320.8c4259bf.gerrit@pmp.uni-hannover.de> <4B884757.9040001@digiware.nl> <20100227080220.ac6a2e4d.gerrit@pmp.uni-hannover.de> <4B892918.4080701@digiware.nl> <20100227202105.f31cbef7.gerrit@pmp.uni-hannover.de> <20100227193819.GA60576@icarus.home.lan> Organization: Albert-Einstein-Institut (MPI =?ISO-8859-1?Q?f=FCr?= Gravitationsphysik & IGP =?ISO-8859-1?Q?Universit=E4t?= Hannover) X-Mailer: Sylpheed 2.4.2 (GTK+ 2.10.12; i386-portbld-freebsd6.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-PMX-Version: 5.5.9.388399, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.2.27.213052 Cc: freebsd-fs@freebsd.org, stable@freebsd.org, Willem Jan Withagen Subject: Re: mbuf leakage with nfs/zfs? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Feb 2010 21:43:37 -0000 On Sat, 27 Feb 2010 11:38:19 -0800 Jeremy Chadwick wrote about Re: mbuf leakage with nfs/zfs?: JC> I should point out that the NFS+ZFS-based filer doesn't actually do its JC> backups using NFS; it uses rsnapshot (rsync) over SSH. There is JC> intense network I/O during backup time though, depending on how much JC> data there is to back up. The NFS mounts (on the clients) are only JC> used to provide a way for people to get access to their nightly JC> backups in a convenient way; it isn't used very heavily. That's rather similar to my situation, I would say. Most traffic goes via rsync, nfs only gives access to home dirs, which are not intensively used. JC> I can do something NFS-intensive on any of the above clients if people JC> want me to kind of testing. Possibly an rsync with a source of the NFS JC> mount and a destination of the local disk would be a good test? Let me JC> know if anyone's interested in me testing that. >From the last emails I would say we get most out of it by comparing tcp and udp clients to make sure this happens only with udp (and it is still not quite clear to me if it also happens with a FBSD client using udp). OTOH it would be great if someone with the ability to actually fix something in the nfs code could get in this discussion to guide us to do the debugging needed to do so. cu Gerrit