On Fri, 2010-07-09 at 16:26 +0200, Tomasz Chmielewski wrote: > Hi, > > I'm about to set up bind with GeoIP patches. > > What I'm not sure, is how do you guys handle high availability? > > Suppose I have zones for Americas and Europe, and a destination server > in Europe dies - how do you handle it so that new (i.e. web) requests > hit American servers only? > > Set TTL to low values (i.e. 10 minutes max) and reconfigure the zones if > European servers are down? Something else? > > I assume typical hosting, without access to sophisticated network > settings, like BGP. > >
The textbook answer is to use anycast, which is how ISC (among others) provide redundancy for their F-root nameserver. Failing that, you'd probably turn to simply having more than one server in any location and employing more mundane clustering and load-balancing techniques to share your DNS servers' I address(es) between several physical servers. Mark. -- Mark Watts BSc RHCE MBCS Senior Systems Engineer, Managed Services Manpower www.QinetiQ.com QinetiQ - Delivering customer-focused solutions GPG Key: http://www.linux-corner.info/mwatts.gpg
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