Date: Thu, 12 Mar 2009 11:39:25 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: Performance with hundreds of nullfs mounts? Message-ID: <gpaopm$jo4$1@ger.gmane.org> In-Reply-To: <49B81C01.1080007@csub.edu> References: <9bbcef730903101927l3134ce66vf959354914fe4754@mail.gmail.com> <49B81C01.1080007@csub.edu>
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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--
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