54 Introduction to the New Mainframe: Large-Scale Commercial Computing
achieve workload distribution. We list them here, from the simplest to the more
sophisticated.
Manually The network is divided into subnetworks and each of them is
served by an application server. This approach is a fixed one
and can end in an overloaded server next to an underloaded
one.
Round robin There are also workload distributors that are connected to
more than one server and can send a request in a more
balanced way. Even in this approach the balance is not always
even, because the units of work, or transactions, can be of
many different sizes.
These workload distributors can be external machines that are
connected to different IP addresses, each corresponding to ...