Perlbal::Manual::FailOver - Fail Over mechanism in Perlbal
Perlbal 1.78.
How Perlbal's Fail Over mechanism works.
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.
Perlbal::Manual::LoadBalancer, Perlbal::Manual::ReverseProxy.
