Re: build.sh: set creation is serialized

[Alan Barrett <apb%cequrux.com@localhost>]

On Wed, 30 Apr 2008, Juan RP wrote:
> The default disk scheduler sucks with concurrent I/Os. BUFQ_READPRIO
> or BUFQ_PRIOCSCAN will help you (in case that you aren't using them yet).

I have never managed to figure out which layer should use priocscan when
you have a complex arrangement of cgd, raid, vnd, etc., on top of the
real disks.  Right now, on my laptop, I have ffs on cgd on wd, and I use
"strategy fcfs" at the cgd level, and "strategy priocscan" at the wd
level.

--apb (Alan Barrett)