Date: Wed, 11 Mar 2009 13:16:01 -0700 From: Russell Jackson <raj@csub.edu> To: freebsd-stable@freebsd.org Subject: Re: Performance with hundreds of nullfs mounts? Message-ID: <49B81C01.1080007@csub.edu> In-Reply-To: <9bbcef730903101927l3134ce66vf959354914fe4754@mail.gmail.com> References: <9bbcef730903101927l3134ce66vf959354914fe4754@mail.gmail.com>
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[-- Attachment #1 --] 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 or 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 available 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'in Windows boxes to manage it. -- Russell A. Jackson <raj@csub.edu> Network Analyst California State University, Bakersfield The first thing I do in the morning is brush my teeth and sharpen my tongue. -- Dorothy Parker [-- Attachment #2 --] -----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-----
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