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Date:      Wed, 10 Sep 1997 19:55:32 -0700 (PDT)
From:      Doug White <dwhite@gdi.uoregon.edu>
To:        Robert Strickler <RStrickler@hq.koch.com>
Cc:        "'freebsd-questions@freebsd.org'" <freebsd-questions@FreeBSD.ORG>
Subject:   Re: Clustering/fail-over capability?
Message-ID:  <Pine.BSF.3.96.970910195225.15258R-100000@localhost>
In-Reply-To: <c=US%a=_%p=KOCH%l=HQNS1-970910215125Z-781@hqns1.hq.koch.com>

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On Wed, 10 Sep 1997, Robert Strickler wrote:

> Is there anything built-in to FreeBSD similar to allow us to set up an
> identical secondary server and when the primary server stops
> communicating, have it take over (with the failed servers IP addresses)
> and try and shutdown the primary server?

That's pretty complex functionality for lowly PCs :)

To be honest, no, there's no specific functionality built into the core
system to do this nicely and cleanly.  However, doing automatic takeover
isn't done nicely and cleanly. You have to define what is meant by `stops
communicating', and how to remotely shut down a machine without creating a
gigantic security hole in the process.  (If you can do this securely, the
UPS people want to talk to you.)

Mirroring disks is pretty easy to do, the built-in disk striping driver
(ccd) does this already.  But the rest is pretty tricky.

You might consider contacting hackers@freebsd.org and/or searching the
mail archives for past discussion on this topic.

Good luck!

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major
Spam routed to /dev/null by Procmail    | Death to Cyberpromo




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