Real Server Assignment - KEMP Technologies LoadMaster 1500 Installation And Configuration Manual

Scheduling method
This section allows you to select the method by which the balancer will select a real server, for this particular
service. The scheduling methods are as follows:
Round Robin
Round Robin causes the balancer to assign real servers to a session in order, i.e. the first session connects to
real server 1, the second to real server 2 etc. There is no bias in the way the real servers are assigned.
Weighted Round Robin
This method uses the weight property of the real servers to determine which real servers get preference. The
higher the weight a real server has, the higher the proportion of connections it will receive.
Least Connection
With this method, the current real server with the fewest open connections is assigned to the session.
Weighted Least Connection
As with Least Connection, but with a bias relative to the weight.
Adaptive
Adaptive scheduling means that the load on the real servers is periodically monitored and that packets are
distributed such that load will be approximately equal for all machines. More detail can be found in the section
covering Global Settings.
SSL Acceleration
This checkbox appears when the criteria for SSL Acceleration have been met, and serves to activate SSL
Acceleration. For more information about SSL Acceleration, please refer to the Fast Track C chapter. If there is
no certificate for the virtual service, you will be prompted to install a certificate. To download a certificate,
enter the remote host where the certificate is located and your username and password for this host. Then
enter the filename of the certificate and the private key, and click "Get File" to install them.

2.3. Real Server Assignment

This section lists the real servers that are assigned to the virtual service. The properties of the real servers are
summarized and there is also the opportunity to add or delete a real server, or modify the properties of a real
server. When Content Switching is enabled, there is also the opportunity to add rules to, or remove rules
from, the real server (see Add Rule).
2.4. Add / Modify Real Server
Here, the properties of the real server are set. These are:
The real server IP address (this is not editable when modifying a real server).
The forwarding port of the real server. This field is editable, so the port may be altered if necessary.
The forwarding method. This is NAT - Network Address Translation - or Route (Direct) forwarding – if available
dependent on the other modes selected for the service.
The real server's weight. This is weight of the real server, as used by the Weighted Round Robin, Weighted
Least Connection and Adaptive scheduling method. The default initial value for the weight is 1000, the
maximum is 65535, the minimum is 1. It is a good benchmark to give a real server a weight relative to its
processor speed, i.e. if server1 seems to bring four times the power of server2, assign a weight of 4000 to
server1 and weight of 1000 to server2.
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