Creating COS Service Device Pools

This topic describes the process of creating a pool of COS - Service Devices (COS - SDs) within a COS ConfigurationA logical grouping of devices, usually consisting of one or more COS - SDs and Testing Devices. A COS Configuration has two primary functions: It allows you to logically group Testing Devices and COS - SDs and it allows you to easily specify the settings for all of the devices in the COS Configuration.. The process varies depending on whether the pool of COS - SDs uses the default COS - SD-selection process or a selection process based on load-balancing hardware and software.

The default COS - SD-selection process uses a “round-robin” approach—when multiple COS - SDs are linked to a single COS Configuration, the COS - SDs in the pool are selected for work uniformly. For example, if 5000 testers use a round-robin pool containing 10 COS - SDs, each COS - SD will service approximately 500 testers, regardless of the current workload on the device. This type of pool is not a load-balanced pool.

Alternatively, if you have installed and configured load-balancing hardware and software, you can link COS - SDs to your load-balancing hardware and software to create a load-balanced pool of COS - SDs. COS - SDs in this type of pool are selected for work based on the parameters specified in your load-balancing hardware and software.