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From: mishkin@apollo.HP.COM (Nathaniel Mishkin)
Newsgroups: comp.sys.apollo
Subject: Re: File sharing across machines?
Message-ID: <1991Mar8.084136@apollo.HP.COM>
Date: 8 Mar 91 13:41:00 GMT
References: <1991Feb23.015726.8621@intek01.uucp> <50164f63.20b6d@apollo.HP.COM> <1991Mar1.153324@apollo.HP.COM>
Sender: root@apollo.HP.COM
Reply-To: mishkin@apollo.HP.COM (Nathaniel Mishkin)
Organization: Hewlett-Packard Company - Cooperative Computing Division / East
Lines: 23

In article <1991Mar1.153324@apollo.HP.COM>, mishkin@apollo.HP.COM (Nathaniel Mishkin) writes:
>The only significant
>differences between the NFS server and the one in DOMAIN is that the
>former uses a publicly specified protocol (good idea!) and the latter
>embodies and enforces certain rules about concurrent access to files
>(also a good idea, as far as I'm concerned).

I've been informed by reliable sources that a future release of DOMAIN
has "relaxed" its locking rules to allow multiple readers and one writer
spread over as many nodes as you like.  (No strong promises about
consistency though.  Just like NFS.)  I think this will make a lot of
people (although not everyone, I'm sure) happier.  (Among other things,
it will let me read the log files on the random nodes I tend to have
to watch [i.e., without crp'ing onto the nodes first].) I think it's
a reasonable compromise:  the kind of damage that can result from reading
inconsistent data tends to be somewhat less than can result from what
happens if writers collide in an uncontrolled way.

--
                    -- Nat Mishkin
                       Cooperative Object Computing Division / East
                       Hewlett-Packard Company
                       mishkin@apollo.hp.com