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From: dbmt@brl-tgr.UUCP
Newsgroups: net.database,net.unix-wizards
Subject: Re: Database software for UNIX systems
Message-ID: <2155@brl-tgr.ARPA>
Date: Thu, 6-Feb-86 15:43:57 EST
Article-I.D.: brl-tgr.2155
Posted: Thu Feb  6 15:43:57 1986
Date-Received: Tue, 11-Feb-86 05:46:13 EST
References: <426@godot.UUCP> <164@hscfvax.UUCP> <131@wgivax.UUCP> <1133@ptsfa.UUCP> <509@mtxinu.UUCP>
Reply-To: waltermy@brl.ARPA (Mike Waltermyer <waltermy>)
Organization: Ballistic Research Lab
Lines: 21
Xref: watmath net.database:211 net.unix-wizards:16704

In article <509@mtxinu.UUCP> ed@mtxinu.UUCP (Ed Gould) writes:
>>> ...  Ingres also requires mods to the kernel... 
>>
>>Actually, Ingres has a locking pseuodo device driver. I do not think that
>>adding a "device" driver is equivalent to "mods to the kernel" since you
>>are not changing kernel source code.
>
>There are several versions of Ingres.  The current commercial version
>from RTI does not require kernel mods, although older versions did.
>The current mechanism just adds a driver.  Research Ingres, running
>on 4.2/4.3BSD uses a user-level lock manager that communicates with
>the database software via a socket.
>

We, at BRL have a lock daemon supplied by RTI.  As far as I know, we are the
only such installation.  It was developed for us by RTI, at our insistence,
as a prototype to aviod the kernel mod required by INGRES 2.0.  We have been
using it successfully since June 1985.  I have been trying to persuade RTI
to support it as an alternative; but they won't commit themselves.

    Maybe a little pressure from netland...