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From: desnoyer@apple.com (Peter Desnoyers)
Newsgroups: comp.sys.mac,comp.protocols.appletalk
Subject: Re: Increasing RAM on AppleShare Server
Message-ID: <4701@internal.Apple.COM>
Date: 12 Oct 89 17:21:00 GMT
Sender: usenet@Apple.COM
Distribution: usa
Organization: Apple Computer, Inc.
Lines: 29
References:<349@sdcc19.ucsd.EDU> <1989Oct11.022443.25922@paris.ics.uci.edu> <33912@beta.lanl.gov>

In article <33912@beta.lanl.gov> laa@beta.lanl.gov (Lee A Ankeny) writes:
> I'd like to share the results of my own crude test of file transfer 
speed 
> on LocalTalk versus EtherTalk networks.
> 
> I timed the transfer of a 2 megabyte file both to and from AppleShare 
> servers attached to each network. Both servers were Mac Plusses, though the 
> hard disks were different. 

What sort of network interface do the servers have? If the server is a Mac 
Plus, I would think that it has a LocalTalk interface. It doesn't matter 
how fast you can receive data if the server can only send it at 
230kbit/sec.

> The results were dissapointing. Transfer rate was between 13 & 15
> K-bytes/second, on each network, in each direction. 

(approximately 50% of LocalTalk bandwidth. Note - theoretical throughput 
for LocalTalk is >95% of bus speed.)

I just copied a 2Meg file from a server (Mac II, some sort of Northern 
Telecom big disk with built-in backup) to my Mac II (Apple Ethernet card, 
using MPW duplicate) and got a data rate of 42890 bytes/sec, or 
343Kbit/sec. Not astounding, but better than 15kbyte/sec.


                                      Peter Desnoyers
                                      Apple ATG
                                      (408) 974-4469