From owner-freebsd-stable@FreeBSD.ORG Wed Mar 11 20:46:19 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B38E3106567A for ; Wed, 11 Mar 2009 20:46:19 +0000 (UTC) (envelope-from raj@csub.edu) Received: from mh0.csub.edu (mh0.csub.edu [136.168.1.94]) by mx1.freebsd.org (Postfix) with ESMTP id 950F88FC30 for ; Wed, 11 Mar 2009 20:46:19 +0000 (UTC) (envelope-from raj@csub.edu) Received: from strider.csub.edu (strider.csub.edu [136.168.65.65]) (authenticated bits=0) by mh0.csub.edu (8.13.8/8.13.8) with ESMTP id n2BKG46q080543 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 11 Mar 2009 13:16:04 -0700 (PDT) (envelope-from raj@csub.edu) Message-ID: <49B81C01.1080007@csub.edu> Date: Wed, 11 Mar 2009 13:16:01 -0700 From: Russell Jackson User-Agent: Thunderbird 2.0.0.16 (X11/20080916) MIME-Version: 1.0 To: freebsd-stable@freebsd.org References: <9bbcef730903101927l3134ce66vf959354914fe4754@mail.gmail.com> In-Reply-To: <9bbcef730903101927l3134ce66vf959354914fe4754@mail.gmail.com> X-Enigmail-Version: 0.95.7 OpenPGP: id=BD2750DF Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigBDEB598898B05181F0777497" Subject: Re: Performance with hundreds of nullfs mounts? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Mar 2009 20:46:19 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigBDEB598898B05181F0777497 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Ivan Voras wrote: > hi, > I seem to remember hearing an anecdote somewhere that using hundreds > (or thousands?) nullfs mounts for jails results in unreasonably bad > file system access performance. Does somebody have this kind of setup > / is it true? I was doing this with jails --before we moved to VMware ESX (for better o= r worse)-- and didn't see any noticeable performance degradation at the time (6.x series= ). For those interested, the biggest plus for going to the ESX model is that= it decoupled low utilization Windows boxes from over-spec'ed hardware and made it availabl= e for FreeBSD to use ;-). The downsides are that it's proprietary, it's expensive, it's in= efficient (e.g. duplicated files and kernel instances everywhere), and you need freak'in = Windows boxes to manage it. --=20 Russell A. Jackson Network Analyst California State University, Bakersfield The first thing I do in the morning is brush my teeth and sharpen my tongue. -- Dorothy Parker --------------enigBDEB598898B05181F0777497 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkm4HAQACgkQq3dx2r0nUN923QCgmxuegwGXszptnegqlGQKwt31 pwYAn2kjrzXK0baYkhl0tD+XpSNSUHI9 =ubKN -----END PGP SIGNATURE----- --------------enigBDEB598898B05181F0777497--