Article View: comp.lang.postscript
Article #3013Disk cache? [was Re: Obscure LaserWriter features}
From: Philip Machanick
Date: Wed, 05 Sep 1990 21:18
Date: Wed, 05 Sep 1990 21:18
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1586 bytes
In article <1546@chinacat.Unicom.COM>, woody@chinacat.Unicom.COM (Woody Baker @ Eagle Signal) writes: > It would not be a matter of economy, but rather one of speed. Being able > to write to the disk at the full SCSI speed would ridiculously speed printing > up, as you can use the disk as a *VERY* large print buffer... It would be interesting to test this statement. In general, caching works by having a relatively small amount of fast memory, rather than a relatively large amount of slow memory. For the price of an external 20M SCSI disk, you could probably buy about 4M of RAM. I would guess in most practical applications, increasing the amount of RAM sould be a more effective way of speeding things up (RAM access time: about 100ns; disk access time: around 20ms - 200 times slower, if my arithmetic is right; not the whole story, but the right order of magnitude...). Philip Machanick philip@pescadero.stanford.edu
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!decwrl!shelby!neon!pescadero.Stanford.EDU!philip From: philip@pescadero.Stanford.EDU (Philip Machanick) Newsgroups: comp.lang.postscript Subject: Disk cache? [was Re: Obscure LaserWriter features} Message-ID: <1990Sep5.211829.4130@Neon.Stanford.EDU> Date: 5 Sep 90 21:18:29 GMT References: <1546@chinacat.Unicom.COM> <428@macuni.mqcc.mq.oz> <1510@chinacat.Unicom.COM> <1899@mountn.dec.com> Sender: news@Neon.Stanford.EDU (USENET News System) Reply-To: philip@pescadero.stanford.edu Organization: Computer Science Department, Stanford University Lines: 17