Mirroring A Site

"Gerry White - use my name at dergal dot come for email" <ukinfo.RemoveThis@cj.com>
wrote in message news:1S69b.320$eK3.253@news-binary.blueyonder.co.uk...
 >
  > > Also, how many servers would be sufficient?
 >
 > 15
 >
 > Seriously, one SHOULD be enough for three nine up time 99.9% but two
should
 > give you nearly 100% as long as
 > 1. there in seperate datacenters
 > 2. there on completely seperate networks...
 > 3. there not both relying on the same nameservers, database, etc... any
key
 > area of infrastructure...
 >
 > What is the site, why is it so critical, are there any other factors...

It has to do with critical weather data being provided to subscribers.

 > How to do it? Nameservers is a start, use four name servers instead of
two,

So am I understanding this correctly? If I type url.com into my browser and
the browser can't find a site at dns1.com or dns2.com, it will look at
dns3.com and dns4.com

Thanks,
Bill<!-- ~MESSAGE_AFTER~ -->
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"DollarBill" <nospambillgean.RemoveThis@nospamearthlink.net> wrote in message
news:3_79b.11337$Aq2.7237@newsread1.news.atl.earthlink.net...
 > "Gerry White - use my name at dergal dot come for email" <ukinfo.RemoveThis@cj.com>
 > wrote in message news:1S69b.320$eK3.253@news-binary.blueyonder.co.uk...
  > >
   > > > Also, how many servers would be sufficient?
  > >
  > > 15
  > >
  > > Seriously, one SHOULD be enough for three nine up time 99.9% but two
 > should
  > > give you nearly 100% as long as
  > > 1. there in seperate datacenters
  > > 2. there on completely seperate networks...
  > > 3. there not both relying on the same nameservers, database, etc... any
 > key
  > > area of infrastructure...
  > >
  > > What is the site, why is it so critical, are there any other factors...
 >
 > It has to do with critical weather data being provided to subscribers.
 >
  > > How to do it? Nameservers is a start, use four name servers instead of
 > two,
 >
 > So am I understanding this correctly? If I type url.com into my browser
and
 > the browser can't find a site at dns1.com or dns2.com, it will look at
 > dns3.com and dns4.com
 >
Thats the basics -
also useful to shorten the ttl of each name server
to speed up response time<!-- ~MESSAGE_AFTER~ -->
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