Performance with hundreds of nullfs mounts?

[Russell Jackson]

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 at 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

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