Re: solaris 7 & squid

On Fri, Dec 10, 1999, Jens-S. Voeckler wrote:

> Anyway, I fiddled a little with my PCI-HW-RAID (the drives look to the
> kernel like pure disks) and UFS logging:
>
> 1) Yes, for plain linear write, UFS logging seems to improve performance.
> 2) No, for linear writes with 10 % random reads, UFS logging is not
> makeing too much of a difference. This is what I estimated as squid
> behaviour with a fresh cache.
> 3) No, for random writes with 10 % random reads, UFS logging is actually
> slowing you down. This is a rough estimation for a squid runinng a few
> weeks (granted, a real squid would have a lot more reads).

I tried UFS logging on a group of UE's here, and they caused the servers
to spiral into a steaming heap after a short while. Did Sun stick the UFS
log at the beginning of the disk, or did they distribute it out alongside
each cylinder group?

Adrian

-- 
Adrian Chadd					Systems Engineer
<adrian@ip.versatel.net>			Versatel Telecom BV
						Amsterdam, The Netherlands
	"Music in the soul can be heard by the universe" - Lao Tsu