How can I duplicate an http request to another server when the first one fails?

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Igor Balyas2014-09-15 22:56:45

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Igor Balyas, 2014-09-15 22:56:45

How can I duplicate an http request to another server when the first one fails?
can eat an opportunity to make through dns?

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3 answer(s)

A

Alexander, 2014-09-16
@aspetek

Well, the easiest option is to make several A-records in DNS.
In theory, if the first ip is not available, the browser should turn to the next one.
As it is in reality, I do not know, I did not test it.

S

Sergey, 2014-09-15
Protko @Fesor

dns only resolves an IP address by domain name. As soon as the browser or operating system has received a response from the DNS server, it caches the response and does not access it again (a couple of minutes like). As a result, if everything fell on this IP, nothing can be done. You can only make a decision at the DNS server level based on the load on the server (a kind of load balancer at the DNS level).

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s1dney, 2014-09-16
@s1dney

A complex option and the most effective one is smart DNS, but in my opinion, they still haven’t come up with ready-made solutions so that they can take it, install it and work like that.
A simple option is to use AWS or raise your own load balancer (with the latter there is a very significant drawback - all traffic will go through it)