Path: utzoo!attcan!uunet!husc6!think!bloom-beacon!apple!keith
From: keith@Apple.COM (Keith Rollin)
Newsgroups: comp.sys.apple
Subject: Re: GS/OS
Message-ID: <18409@apple.Apple.COM>
Date: 7 Oct 88 18:35:44 GMT
References: <8809302002.aa26185@SMOKE.BRL.MIL> <3678@dad.UUCP> <9773@srcsip.UUCP>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 19

In article <9773@srcsip.UUCP> shankar@ely.UUCP (Subash Shankar) writes:
>Does anybody know what the benefits of the disk caching NDA under GS/OS?
>I have tried several different values for the cache size, but all of them
>(including 0K) seem to have the same performance when I tested their speeds
>at disk copying.  The same disk copying, when run with the Applied Engineering
>GS/RAM cache, runs significantly faster.  So what is the NDA cache used for?

The GS/OS RAM cache is for the most recently and most frequently used blocks
read from disk. Since you are reading each block only once, the benefits of
a cache are not achieved; this is NOT a READ AHEAD cache.



Keith Rollin                               UUCP:      amdahl\
Developer Technical Support                      pyramid!sun !apple!keith
Apple Computer                                        decwrl/
                                         BITNET: keith%apple.com@relay.cs.net
"You can do what you want to me, but leave my computer alone!"