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? Message-ID: <Pine.BSF.3.96.970912213635.1736A-100000@acp.qiv.com> In-Reply-To: <Pine.BSF.3.96.970912211308.12209A-100000@super-g.inch.com>
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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
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