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Article #69

DFS & DQS (was "Re: How are people managing sources?")

#69
From: Lloyd Wheeler
Date: Tue, 12 Jan 1993 15:35
32 lines
1956 bytes
In article <1993Jan7.195359.1@vax.path.ox.ac.uk>, jasper@vax.path.ox.ac.uk writes:
|> In article <4362@mitech.com>, gjc@mitech.com (George J. Carrette) writes:
|> > How are people managing their sources now that there are two VMS
|> > platforms, VAX and ALPHA?
|> > 
|> > For example, I would love to be able to access my CMS libraries
|> > that are sitting on my VAX directly from my ALPHA machines.
|> > However, CMS does not support any network operations, and mixed vms
|> > clusters are not something that claim to be supported.
|> > 
|> o o o
|>
|> Other options are said to be DFS and DQS. Any comments?

DQS (Distributed Queueing Services) would not, per se, provide a shared
filesystem, but simply a method for submitting jobs cross-network.

DFS (Distributed File System) provides a shared filesystem approach, but at
least as of a couple years ago (circa 1990-1991) it did not support shared
access to modifiable files (that is, it didn't support record locking).  In
the same timeframe, such a modifiable file was at the heart of a CMS library,
and hence using DFS would restrict you to a single CMS library access at a
time (if memory serves).

Things may have changed in either CMS or DFS;  I suggest that you just get 
a very clear answer before you buy (although I don't recall a reference to 
CMS, the limitations on filesharing were outlined pretty clearly in the DFS 
documentation).

Lloyd Wheeler
wheeler@kpc.com
Former VAX/VMS dude
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Message-ID: <1993Jan12.153551.15221@kpc.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!agate!spool.mu.edu!sgiblab!news.kpc.com!kpc!wheeler
References: <4362@mitech.com> <1993Jan7.195359.1@vax.path.ox.ac.uk>

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From: wheeler@thorn.kpc.com (Lloyd Wheeler)
Subject: DFS & DQS (was "Re: How are people managing sources?")
Message-ID: <1993Jan12.153551.15221@kpc.com>
Sender: wheeler@thorn (Lloyd Wheeler)
Organization: Kubota Pacific Computers Inc.
References: <4362@mitech.com> <1993Jan7.195359.1@vax.path.ox.ac.uk>
Date: Tue, 12 Jan 1993 15:35:51 GMT
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