erlbal

erlbal is an erlang load balancer.

Balancer calls:

• start_bal/0 spawns a balancer.
• stop_bal/1 takes a balancer kills the balancer.
• list_servers/1 takes a balancer and returns a list of the servers it balances over.

Server calls:

• start_server/2 takes a balancer, a node and a function and spawns a server on the node to serve the function.
• stop_server/2 takes a balancer and a server PID and stops the server and removes it from the balancer.

Request calls:

• make_request/1 takes a balancer and returns the response from the server.
• make_request/2 takes a balancer and an argument and returns the response from the server.

The function:

The function must take two lists, some arguments and some state.

It must return a tuple of {Return value, new state}.

Info

The balancer round robins requests between erlang processes.
When it receives a request, it forwards it on to the next server in the round robin.
The server then runs the function with the argument passed to it and returns a response to the balancer.
The balancer forwards the response back to the requestor.

The function arg could be anything, so you can pass multiple args in a tuple or list, etc.