Richard W.M. Jones wrote:
We found virtualisation made a great solution for isolating different servers from each other. We had previously had a problem where our Apache required so many different modules to support the various different services we were running that the Apache config became extremely fragile. No such problem with Xen however since we just ran different Apache instances on different guests, with a web accelerator in front of them (a stripped down Apache with mod_proxy) so that all the backend Apaches would appear on the same IP address. You could reboot a backend server easily if it failed without affecting any other production service.
I should add that if you do consider an Apache configuration like the above, then this little module is an absolute life-saver:
http://stderr.net/apache/rpaf/ Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903
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