Alan Kasindorf > Perlbal > Perlbal::Manual::FailOver

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NAME ^

Perlbal::Manual::FailOver - Fail Over mechanism in Perlbal

VERSION

Perlbal 1.78.

DESCRIPTION

How Perlbal's Fail Over mechanism works.

Fail Over

Whenever Perlbal fails to open a connection to a machine, it assumes that machine is not available and spreads the load between the remaining servers. It keeps trying to open connections to that server according to error_retry_schedule.

If there are no available servers, Perlbal will keep trying to open connections to the servers until idle_timeout is reached, upon which it will close the connection to the user. Clients interpret that closing differently: most will assume a 500 HTTP code, a few assume a 200 OK with empty content.

For more information on parameters idle_timeout and error_retry_schedule see Perlbal::Manual::ReverseProxy.

SEE ALSO

Perlbal::Manual::LoadBalancer, Perlbal::Manual::ReverseProxy.

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