From owner-freebsd-stable@FreeBSD.ORG Thu Mar 12 10:40:07 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 07B8910656C5 for ; Thu, 12 Mar 2009 10:40:07 +0000 (UTC) (envelope-from freebsd-stable@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id 8362A8FC1F for ; Thu, 12 Mar 2009 10:40:06 +0000 (UTC) (envelope-from freebsd-stable@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1LhiKa-0001Ch-Gr for freebsd-stable@freebsd.org; Thu, 12 Mar 2009 10:40:04 +0000 Received: from lara.cc.fer.hr ([161.53.72.113]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 12 Mar 2009 10:40:04 +0000 Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 12 Mar 2009 10:40:04 +0000 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-stable@freebsd.org From: Ivan Voras Date: Thu, 12 Mar 2009 11:39:25 +0100 Lines: 50 Message-ID: References: <9bbcef730903101927l3134ce66vf959354914fe4754@mail.gmail.com> <49B81C01.1080007@csub.edu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig56FB95EA474CC21387505193" X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr User-Agent: Thunderbird 2.0.0.19 (X11/20090105) In-Reply-To: <49B81C01.1080007@csub.edu> X-Enigmail-Version: 0.95.0 Sender: news 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: Thu, 12 Mar 2009 10:40:08 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig56FB95EA474CC21387505193 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Russell Jackson wrote: > 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? >=20 > I was doing this with jails --before we moved to VMware ESX (for better= or worse)-- and > didn't see any noticeable performance degradation at the time (6.x seri= es). Thanks, everyone. I've tracked it down and I heard it from a collegue, only he was talking about unionfs not nullfs. > For those interested, the biggest plus for going to the ESX model is th= at it decoupled low > utilization Windows boxes from over-spec'ed hardware and made it availa= ble for FreeBSD to > use ;-). The downsides are that it's proprietary, it's expensive, it's = inefficient (e.g. > duplicated files and kernel instances everywhere), and you need freak'i= n Windows boxes to > manage it. Yes, ESX is nice. I've also tried XenServer (the "official" Xen) and it's been terrible - both slow and clunky. Any other experiences? --------------enig56FB95EA474CC21387505193 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJuOZkldnAQVacBcgRAmPxAKDnr9+PR0IwYGHxLN2UkSEE9C/KhACeOV8j IM8d/k+I0hcEU72msWeiNYc= =vvCW -----END PGP SIGNATURE----- --------------enig56FB95EA474CC21387505193--