InfoCenter Home > 7.1.3.3: Vertical scaling sample topologyOverviewVertical scaling refers to setting up multiple application servers, typically by using clones, on a machine.
In this simple example, vertical scaling is done by creating multiple clones of an application server on Machine A. Although this example shows vertical scaling on a single machine, you can implement vertical scaling on more than one machine in a configuration. (The Advanced Edition application server run time must be installed on each machine.) Combine vertical scaling with the other topologies described in this section to boost performance and throughput. Typical useVertical scaling offers the following advantages:
Single machine vertical scaling topologies have the drawback of introducing the host machine as a single point of failure in the system. However, this can be avoided by using vertical scaling on multiple machines. InstructionsTo set up a vertical scaling topology, use the administrative client to configure a set of application server clones that reside on the same machine. See Article 7.2, Managing workloads, for more information on cloning an application server. To set up vertical scaling, you need only perform the tasks pertaining to local clones. It is recommended that you plan vertical scaling configurations ahead of time. However, since they do not require any special installation steps, you can always implement them later on an as-needed basis. When you are deciding how many clones to create on a machine, you need to take several factors into account:
The best way to ensure good performance in a vertical scaling configuration is to tune a single instance of an application server for throughput and performance, then incrementally add clones. Test performance and throughput as each clone is added. Always monitor memory use when you are configuring a vertical scaling topology and do not exceed the available physical memory on a machine. |
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