> > So what is a reasonable level of availability, without going to Local
> > Director-based load balancing or something overboard like that? This
> > isn't for a bank or the military--so I need to be reasonable about it.
>
> Running NT? Based on experience of this type of database intensive app,
> you'll be lucky to get 95%. Very lucky.
>
> This includes hardware upgrades when your database exceeds available
> memory, shutdowns and reboots when memory leaks crap your server out, blue
> screens and other sundry NT mysteries.
Actually 99% (1 hour down every 4 days) is quite easily achievable with NT,
and 99.9% (7 hours down per month) is within reach if you use oversized
server, doing one task and not having to work too hard and use few "magic"
tricks. However 99.9% is not really that good, considering most of my linux
server have availability of 99.98-99.99% (1-2 hours per year). And they do
so without having to use any "magic" tricks.
Dave.
---
David Zverina
Alt Key Pty. Ltd.
http://www.altkey.com
PO Box 3121, Parramatta, 2124, Australia
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