[nSLUG] XEN & Heartbeat

Michael Crawford mdcrawford at gmail.com
Wed Jun 3 20:59:59 ADT 2009

On Wed, Jun 3, 2009 at 4:27 PM, Hatem Nassrat <hnassrat at gmail.com> wrote:
> I have briefly looked at fault tolerance during my MACS at dalhousie
> and I remember reading about systems which can even handle hardware
> failures by having standby replicas of the hardware within the machine
> itself.

While it's quite likely an urban legend, it was said that one could
fire a shotgun through a Tandem box without it going down.

Tandem specialized in redundant, fault-tolerant hardware.  But they
were also very expensive, so I don't think they're around anymore.

There are lots of hardware products designed to enable various kinds
of fault-tolerance, but again they are all very expensive.

Whether the expense is worth it depends on what the cost of your
downtime or data loss would be.

Michael David Crawford
mdcrawford at gmail dot com

   GoingWare's Bag of Programming Tricks

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