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From: peter@trlsasy.trl.oz (Peter Richardson)
Newsgroups: comp.arch,misc.wanted,aus.computers,aus.wanted
Subject: Re: Definition of Fault Tolerant Architectures
Keywords: fault tolerant
Message-ID: <228@trlsasy.trl.oz>
Date: 12 Aug 88 14:58:18 GMT
References: <433@otc.oz>
Reply-To: peter@trlsasy.trl.oz (Peter Richardson)
Organization: Telecom Research Labs., Switched Networks Research Branch
Lines: 22

In article <433@otc.oz> ronb@otc.oz (Ron Barrett) writes:
>I'm looking for CONCISE definitions of the following Fault Tolerant 
>architectures.
>    1) tightly coupled.
>  & 2) loosely coupled.
>
>Any help/discussion would be greatly appreciated. Thanks.

I have found that the following seems to work for most systems:

Loosely Coupled: each processor has its own local memory and IO resources.

Tightly Coupled: processors are not bound to particular memory or IO
	resources (implies high bandwidth interconnections).

To get a more general definition CONCISEness goes out the window.

---
Peter Richardson,			ACSnet: peter@trlsasy.trl.oz 
Telecom Research Laboratories,  	UUCP: {uunet,mcvax}!trlsasy.trl.oz!peter
PO. Box 249, Clayton, Vic. 3168,	Phone: (03) 541-6342
Australia.		        	Fax: (03) 544-2362
D