Is this Possible ?

[Suchy]

Is this possible.

If a server with a website is down and someone clicks on a link pointing there, automaticly he/she will go to a duplicate site (or different one) which is on server 2.

But when server 1 is up he/she will not be transfered to the site on Server 2.

[mjc]

Yes, no...maybe.

Possible, but not quite as easy to do.

There are various fail-safe/load balancing stups that will redirect traffic in the event of a problem with a server, but more often than not they rely on either fast DNS updates or redirecting from another location.

Now, if there are multiple servers mirroring each other that the outside world sees as on IP address, it gets a little easier.

Sites like Google, Yahoo and other majors use some sort of redirecting to handle outages.

[juniper]

This is done all the time look at SQUID proxy server if you want free basicly you set it up as a reverse proxy and load balance or failover, for money you can get like Bordermanager running as reverse proxy or cisco CSS (content services switch) there are basicly a lot of devices and setups to do this. The CSS can also do SSL failover so theoreticly the client never even knows that the server whent down even in the middle of a purchase.