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From: bob@sdcsvax.UCSD.EDU (Robert Hofkin)
Newsgroups: comp.sys.apollo
Subject: Re: Updating Large Rings
Message-ID: <4012@sdcsvax.UCSD.EDU>
Date: Sun, 4-Oct-87 21:00:26 EDT
Article-I.D.: sdcsvax.4012
Posted: Sun Oct  4 21:00:26 1987
Date-Received: Wed, 7-Oct-87 07:11:41 EDT
References: <261@nvpna1.UUCP> <262@nvpna1.UUCP>
Reply-To: hofkin@software.org (Robert Hofkin)
Organization: Urban Crisis Sanitary Dump
Lines: 11
Keywords: installation of new OS releases

The 9.2.x -> 9.5.1 upgrade was the first one we did.  Our system
manager built "one true copy" of the installed system, then he hacked
up the install scripts so they ran more or less unattended.  We cut
the network traffic by installing a few selected nodes on the first
pass, then partitioning the network into one ring per "selected" node.
(It seemed that 10 installs on one ring was about right.)  We managed
to upgrade 140 or so nodes in a weekend.

By the way, our system manager gave a talk on this very subject at
ADUS.  If your boss didn't let you go, tell him/her how stupidly
shortsighted he/she/it is!