Return-Path: linux-nfs-owner@vger.kernel.org Received: from fieldses.org ([174.143.236.118]:39198 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753875Ab2KWRXi (ORCPT ); Fri, 23 Nov 2012 12:23:38 -0500 Date: Fri, 23 Nov 2012 12:23:33 -0500 To: "dE ." Cc: linux-nfs@vger.kernel.org Subject: Re: Slow NFS loop performance. Message-ID: <20121123172333.GB8776@fieldses.org> References: <50AF57A3.3090000@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <50AF57A3.3090000@gmail.com> From: "J. Bruce Fields" Sender: linux-nfs-owner@vger.kernel.org List-ID: On Fri, Nov 23, 2012 at 04:31:55PM +0530, dE . wrote: > Humm... The last thing I expected was no response even in the mailing list. > > So I'm filing a bug on this. > > On Oct 23, 2012 2:19 PM, "dE ." wrote: > > Hi! > > > > Great job with NFS server, it surely is fast, but not on loop devices. > > > > If I loop mount a file and share the mount point over NFS3 or NFS4, the > > write performance of the client on the loop mounted share is pretty bad. > > > > On a 100 Mbps (or 12.5MBps) full duplex Ethernet link, I get ~8MBps > > speeds, whereas on the loop mounted device, I get at best 6MBps. What exactly is your test? --b. > > > > Any ideas why? > > > > My server configuration (NFS4) -- > > anonuid=1000,anongid=1000,**secure,no_subtree_check,rw,**fsid=0,crossmnt > > > > My client mount options -- > > rsize=1048576,wsize=1048576,**async,hard,timeo=60,retrans=2,** > > actimeo=900,retry=2,**lookupcache=pos,nfsvers=4,** > > nolock,intr,noacl,rdirplus > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html