From owner-freebsd-hackers@FreeBSD.ORG Mon Nov 17 21:42:21 2014 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id B6257CF7 for ; Mon, 17 Nov 2014 21:42:21 +0000 (UTC) Received: from mail-ie0-x232.google.com (mail-ie0-x232.google.com [IPv6:2607:f8b0:4001:c03::232]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8B2F3AD8 for ; Mon, 17 Nov 2014 21:42:21 +0000 (UTC) Received: by mail-ie0-f178.google.com with SMTP id tp5so3338384ieb.9 for ; Mon, 17 Nov 2014 13:42:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=aqZJe528glVCqaSBM9xM2q3OCCJVWH26PNMJCTBlZnI=; b=0Lf6OMrFzxCJM3pyv4gbsFyXhC7wTxTw1aZdgdrEnLz/83CnSICshIF7yHg75n4yuo 2VvANigeMwkCNMKILhgAo++6Th9odLUgVQz+i33Wcei8xrhrKBefJcXVi9Y+bwx1lT+s P0sQFc9V0DMuH3Flu97itgNR5QQxoaoR8OW02VNYZbXoZHuzfRbPNXVNHxc6yaZwbxac u6GFkvC/pikAch51OJqzheIFdZi2uxrX7na1/7otQ4bZCj77fjVwX4edXyjmMVPwYTFd k0mZ3J5Pt6SQdc6M9yiS1GHyO2sEjeLvVrleGtnhijIJKK8K17s+n37otcewxaa11NSd OYfw== MIME-Version: 1.0 X-Received: by 10.50.73.67 with SMTP id j3mr28569343igv.1.1416260540997; Mon, 17 Nov 2014 13:42:20 -0800 (PST) Sender: jdavidlists@gmail.com Received: by 10.43.96.202 with HTTP; Mon, 17 Nov 2014 13:42:20 -0800 (PST) In-Reply-To: <3176881007-17726@kerio.tuxis.nl> References: <2826701214-10966@kerio.tuxis.nl> <3176881007-17726@kerio.tuxis.nl> Date: Mon, 17 Nov 2014 16:42:20 -0500 X-Google-Sender-Auth: 7SiKKvDYZkSflmyoaAjVnDKtOlc Message-ID: Subject: Re: Slow nfsd write performance, tweaks needed From: J David To: Mark Schouten Content-Type: text/plain; charset=UTF-8 Cc: "freebsd-hackers@freebsd.org" X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Nov 2014 21:42:21 -0000 On Mon, Nov 17, 2014 at 6:08 AM, Mark Schouten wrote: > Thanks for all your responses. I've setup a testserver to do some benchmarks, here are the results. Things are tested from inside a VM, that runs inside a Proxmox-VM, that runs on my Desktop (that performs pretty good, BTW :)) One thing that might also affect your performance testing is that FreeBSD disk I/O under KVM -- which is what Proxmox uses to run FreeBSD -- has historically been pretty terrible, especially with ZFS. The reasons for this are understood, I think, but last I heard the author of the virtio block driver was time-constrained and hadn't had a chance to work on it. Thanks!