Xref: utzoo comp.periphs.scsi:1291 comp.unix.sysv386:1822
Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!voder!pyramid!decwrl!world!unixland!bill
From: bill@unixland.uucp (Bill Heiser)
Newsgroups: comp.periphs.scsi,comp.unix.sysv386
Subject: Re: parameters on CDC Wren IV, Adaptec 1542b
Message-ID: <1990Nov4.143952.5251@unixland.uucp>
Date: 4 Nov 90 14:39:52 GMT
References: <1990Nov3.185524.468@unixland.uucp> <1990Nov04.004934.232@nstar.uucp>
Organization: The Think_Tank BBS & Public Access Unix
Lines: 28

In article <1990Nov04.004934.232@nstar.uucp> larry@nstar.uucp (Larry Snyder) writes:
>
>what you need to do is to change one item at a time - then
>bench the system, change another - then bench, etc..   

Thanks for the feedback Larry.  What utility are you using to do 
your benchmarking?


>I have cache enabled (made a 10% difference) and changed the
>buffer ratios from 4 to 16 (made a + difference on large disk IO,
>and - on small; but since most of mine is large - I changed it)..

I'm a little uncertain about the "buffer ratios" -- I didn't see any
explanation of it in the lenghy aha1542 manual -- do you have anything
that describes them?  My "largest" disk IO activity is news processing
(Cnews) and compiling software -- does that qualify as "large", and 
would you expect it to benefit from the increase in buffer ratios?

Thanks for the info.
Bill


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