[Catalyst] FW: Clustering catalyst apps
johanl at DarSerMan.com
Mon May 8 23:12:28 CEST 2006
At 22:14 2006-05-08, Dave C wrote:
>The key to offer the "five nines" availabilty (99.999%, or under 5
>minutes a year) is to examine faults in every aspect, including
>application, hardware, network, facility, and OS to identify single
>points of failure.
If you go that far, don't forget to make sure your two independent ISPs
really are independent and don't buy their upstream bandwidth from the same
That happened to us a couple of years ago; the upstream provider had some
downtime and we were mightily upset.
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