LF@CRNLVAX5.BITNET.UUCP (04/18/87)
From: BITNET%"GAYMAN%ARTIC.DECNET@ARI-HQ1"
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Date: 17 Apr 87 11:11:00 EDT
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From: "ARTIC::GAYMAN" <GAYMAN%ARTIC.DECNET@ARI-HQ1>
Subject: Ethernet printers
To: CRNLVAX5 Bulletin Board <INFOVAX@CRNLVAX5>
> From: RTB "Bob Baynes" 16-APR-1987 14:41
> Subj: ETHERNET QUESTION
>
> In my experience Ethernet degrades at about 70% its bandwidth (i.e.
> 7 mbytes). We are thinking of putting a C.Itoh printer on a
> Decserver 200. My concern is that given the fact that we have three
> systems (1 VAX 8600, 2 DEC-20s), 150+ users, 4 LN03 printers, and 1
> Imagen 8/300 (soon to be connected), placing a C.Itoh printer on the
> terminal server will push us over the threshold of performance for
> the network.
>
> The assumption is that the C.Itoh printer will print very LARGE
> files that would have to be transferred between the DEC-20s and the
> VAX.
>
> Can anyone give me any ideas or experience on Ethernet performance
> with print servers ?
> -------
>
Our site has an 11/780, 11/785, 11/730, thirty-one servers, (DECSAs, DECserver
100s and DECserver 200s), and some 200+ users. We have seven terminal print
queues connected to all of the servers mentioned and experience no performance
problems on the Ethernet.
Elizabeth Gayman (GAYMAN@ARI-HQ1.ARPA)
------
It's hard to believe someone is concerned over Ethernet load when the
presentation I saw showed 467 nodes on the same Ethernet at DEC and the average
load was 18% with peaks at 56%! -LF-
Larry Fresinski (LF@CrnlVAX5.Bitnet)