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From: kalash@ucbcad.UUCP (Joe Kalash)
Newsgroups: net.unix-wizards
Subject: Re: Re: Kernel mods and RTIngres
Message-ID: <235@ucbcad.UUCP>
Date: Mon, 13-May-85 02:42:52 EDT
Article-I.D.: ucbcad.235
Posted: Mon May 13 02:42:52 1985
Date-Received: Thu, 16-May-85 06:41:25 EDT
References: <410@wdl1.UUCP>
Organization: UC Berkeley CAD Group, Berkeley, CA
Lines: 16

>  The ``Ingres lock device'' is a hack that dates back to at least PWB/Unix
> and maybe before.  There is enough interprocess communication available
> now that it shouldn't be necessary.

	In fact, it dates to V6. However, the obvious question is
which version of IPC should they use? Currently Sys V ipc is not
compatible with BSD ipc, which is not compatible with Version 7
ipc (the happily gone mpx files), etc. While I wrote the ipc version
of the driver for 4.2 (back when I was chief programmer for the
project), I was able to get away with it because the project ONLY
supports Ingres on 4.(current release). RTI has to support their
system on a multitude of systems.

			Joe Kalash
			kalash@berkeley
			ucbvax!kalash