Article View: comp.sys.ibm.pc.hardware.misc
Article #191Re: Cacheing Hard Disk Controllers
From: Needham / Tate Stewart (ISE)
Date: Thu, 10 Aug 1995 00:00
Date: Thu, 10 Aug 1995 00:00
29 lines
2191 bytes
2191 bytes
>>I wonder if this ZERO chance is actually true, as far as I understand it,
>>sone of the caching controllers have pretty elaborate caching schemes
>>implemented on an onboard CPU, I suppose you assume that they only
>>implement a 'most recently accessed' caching scheme wich would justify
>>your ZERO change statement.
>>Any comments whether this is true, and perhaps any numbers to show how
>>efficient a disk controller cache is during 'normal' linux work???
>
>The point is if you're going to pay for memory, give the operating system
>the chance to use it in a flexible way, depending on its workload.
>Linux will use it intelligently.
>People who buy cached disk controllers and get all excited about the
>disk bench mark test don't seem to realise that all this exciting
>I/O is pointless when the extra memory may have avoided the need for
>an I/O in the first place, eg swapping................
I bought a cache controller.... the reason was that i upgraded my RAM to
20MB and i had 4MB left over... so instead of sitting it on the shelf i
put it in a cache controller. I allocate a software cache of about 64k
or so.
.t
*******************************************************
" Where you should be Today - OS/2 Warp"
Tate Needham - u933692@student.canberra.edu.au
- spud@acslink.net.au
*******************************************************
Technical Details
Message-ID:
<40cha5$gt2@csc.canberra.edu.au>Path:
arc1-ca.pugleaf.net!unknown!not-for-mailReferences:
<3vn231$7fp@cleese.apana.org.au> <408nqk$hjf@aimnet1.aimnet.com> <DD1Gu9.KwH@news.cern.ch> <40c86u$143@werple03.mira.net.au>Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10d683,87705628d8f7e5d9 X-Google-Attributes: gid10d683,public X-Google-Thread: 109e38,87705628d8f7e5d9 X-Google-Attributes: gid109e38,public X-Google-Thread: f4d7c,87705628d8f7e5d9 X-Google-Attributes: gidf4d7c,public From: u933692@student.canberra.edu.au (Needham / Tate Stewart (ISE)) Subject: Re: Cacheing Hard Disk Controllers Date: 1995/08/10 Message-ID: <40cha5$gt2@csc.canberra.edu.au> X-Deja-AN: 107830612 references: <3vn231$7fp@cleese.apana.org.au> <408nqk$hjf@aimnet1.aimnet.com> <DD1Gu9.KwH@news.cern.ch> <40c86u$143@werple03.mira.net.au> organization: University of Canberra, ACT, Australia newsgroups: comp.sys.ibm.pc.hardware.misc,aus.computers.ibm-pc,comp.sys.ibm.pc.hardware.storage