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From: naftoli@aecom.UUCP (Robert N. Berlinger)
Newsgroups: net.micro.mac
Subject: Re: Re: Mac Cache
Message-ID: <394@aecom.UUCP>
Date: Tue, 29-Jul-86 10:48:57 EDT
Article-I.D.: aecom.394
Posted: Tue Jul 29 10:48:57 1986
Date-Received: Wed, 30-Jul-86 01:43:54 EDT
References: <932@hounx.UUCP> <842@wang.UUCP> <2017@calmasd.CALMA.UUCP>
Organization: Albert Einstein College of Medicine
Lines: 19

> Does the cache do an automatic write-through all the time?  It seems like
> it would be very dangerous to use if it doesn't.

Although I know nothing of the implementation, I have studied its 
behavior somewhat and think that it does not do immediate 
write-through.  By "immediate write-through" I mean that data 
destined to be written to disk will not necessarily be written 
right away.  For instance, if I set a large cache and then launch 
Red Ryder and receive a file, the incoming data will not be 
written out until the file is closed (at the end of the 
transfer).  So the write-through is not immediate, although it is 
"automatic" (a poor term).  
-- 
Robert Berlinger
Systems Analyst
Albert Einstein College of Medicine

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