From owner-freebsd-questions  Fri Sep 12 19:45:32 1997
Return-Path: <owner-freebsd-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id TAA28233
          for questions-outgoing; Fri, 12 Sep 1997 19:45:32 -0700 (PDT)
Received: from tok.qiv.com ([204.214.141.211])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id TAA28224
          for <freebsd-questions@FreeBSD.ORG>; Fri, 12 Sep 1997 19:45:28 -0700 (PDT)
Received: (from uucp@localhost)
	by tok.qiv.com (8.8.6/8.8.5) with UUCP id VAA21461;
	Fri, 12 Sep 1997 21:45:13 -0500 (CDT)
Received: from localhost (jdn@localhost)
	by acp.qiv.com (8.8.6/8.8.5) with SMTP id VAA01866;
	Fri, 12 Sep 1997 21:44:39 -0500 (CDT)
X-Authentication-Warning: acp.qiv.com: jdn owned process doing -bs
Date: Fri, 12 Sep 1997 21:44:38 -0500 (CDT)
From: "Jay D. Nelson" <jdn@qiv.com>
To: spork <spork@super-g.com>
cc: Don Wilde <don@PartsNow.com>, Marco Molteni <molter@logic.it>,
        freebsd-questions@FreeBSD.ORG
Subject: Re: Clustering/fail-over capability?
In-Reply-To: <Pine.BSF.3.96.970912211308.12209A-100000@super-g.inch.com>
Message-ID: <Pine.BSF.3.96.970912213635.1736A-100000@acp.qiv.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-questions@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

That's exactly the way we set up high availability systems.
Differential SCSI or SSA in each system cabled through an external
tower of drives. Add a serial cable between the two systems to check
on health and a couple of daemons to check machine state and you can
cobble together a rudimentary HA system.

-- Jay

 On Fri, 12 Sep 1997, spork wrote:

    > To stray slightly from this thread, has anyone seen this type of setup in
    > the PeeCee world:
    > 
    > SCSI-ADAPTER----DRIVE----DRIVE----SCSI-ADAPTER
    > 
    > I've seen mention that two controllers can exist on the same chain, is
    > that true?  What type of things could one do with this?
    > 
    > Off to read the SCSI-FAQ,
    > 
    > Charles
    > 
    > On Fri, 12 Sep 1997, Don Wilde wrote:
    > 
    > > and here's another take on this, if we can make a port happen. Note
    > > SOURCE availability.
    > > > Hi:
    > > > 
    > > > We are pleased to announce the availability of  MO6  Version  3.0
    > > > Release 1.04 (beta-4)  - compatible with BSD/OS 3.0,  patch level
    > > > K300-001 through M300-029.
    > > > 
    > > > MO6 is a 6 processor version of the MOSIX multicomputer enhancements
    > > > of BSD/OS for a PC Cluster.  If you have 2 to 6 PC's connected by  a
    > > > LAN, you  can  experience truly multi-computing environment by using
    > > > the MO6 enhancements.
    > > > 
    > > > The MO6 Distribution
    > > > --------------------
    > > > MO6 is available either in "source" or "binary" distribution.  It is
    > > > installed as a patch to BSD/OS,  using an  interactive  installation
    > > > script.
    > > > 
    > > > MO6 is available at http://www.cnds.jhu.edu/mirrors/mosix/
    > > > or at our site: http://www.cs.huji.ac.il/mosix/
    > > > 
    > > > Main highlights of the current release:
    > > > --------------------------------------
    > > > - Memory ushering (depletion prevention) by process migration.
    > > > - Improved installation procedure.
    > > > - Enhanced migration control.
    > > > - Improved administration tools.
    > > > - More user utilities.
    > > > - More documentation and new man pages.
    > > > - Dynamic configurations.
    > > > 
    > > > Please send feedback and comments to mosix@cs.huji.ac.il.
    > > > -------------------
    > > >                      ______   ____   ___  ___  _  __
    > > >  MOSIX  R&D  Group   )  )  )  )   ) (  '   )   \ /       E-mail:
    > > >  Hebrew University  /  /  /  /   /   \    /     /   mosix@cs.huji.ac.il \
    > > >  Jerusalem, Israel (     (  (___(  ___) _(_  __/ \_______________________)
    > > > 
    > > > 
    > > 
    > > -- 
    > >   oooOOO O O O o * * *  *   *   *
    > >  o     ___       _________ _________ ________ _________ _________ ___==_
    > >  V_=_=_DW ===--- Don Wilde [don@PartsNow.com] [http://www.PartsNow.com ]
    > > /oo0000oo-oo--oo-ooo---ooo-ooo---ooo-ooo--ooo-ooo---ooo-ooo---ooo-oo--oo
    > > 
    > 

-- Jay