KEMP Technologies LoadMaster 1500 Installation And Configuration Manual
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Contents
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67Copyright © 2000 - 2005 KEMP Technologies, Inc. All Rights Reserved.Scheduling methodThis section allows you to select the method by which the balancer will select a real server, for this particularservice. The scheduling methods are as follows:Round RobinRound Robin causes the balancer to assign real servers to a session in order, i.e. the first session connects toreal server 1, the second to real server 2 etc. There is no bias in the way the real servers are assigned.Weighted Round RobinThis method uses the weight property of the real servers to determine which real servers get preference. Thehigher the weight a real server has, the higher the proportion of connections it will receive.Least ConnectionWith this method, the current real server with the fewest open connections is assigned to the session.Weighted Least ConnectionAs with Least Connection, but with a bias relative to the weight.AdaptiveAdaptive scheduling means that the load on the real servers is periodically monitored and that packets aredistributed such that load will be approximately equal for all machines. More detail can be found in the sectioncovering Global Settings.SSL AccelerationThis checkbox appears when the criteria for SSL Acceleration have been met, and serves to activate SSLAcceleration. For more information about SSL Acceleration, please refer to the Fast Track C chapter. If there isno 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. Thenenter the filename of the certificate and the private key, and click "Get File" to install them.2.3. Real Server AssignmentThis section lists the real servers that are assigned to the virtual service. The properties of the real servers aresummarized and there is also the opportunity to add or delete a real server, or modify the properties of a realserver. When Content Switching is enabled, there is also the opportunity to add rules to, or remove rulesfrom, the real server (see Add Rule).2.4. Add / Modify Real ServerHere, 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 availabledependent 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, WeightedLeast Connection and Adaptive scheduling method. The default initial value for the weight is 1000, themaximum is 65535, the minimum is 1. It is a good benchmark to give a real server a weight relative to itsprocessor speed, i.e. if server1 seems to bring four times the power of server2, assign a weight of 4000 toserver1 and weight of 1000 to server2. |
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