HP Systems Insight Manager (HP SIM) leverages a distributed architecture that is broken into three types of systems: Central Management Server (CMS), managed systems, and web browser clients.
The CMS and the managed systems together are called the HP SIM management domain.
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Each management domain has a single CMS. The CMS is the system in the management domain that executes the HP SIM software and initiates all central operations within the domain. In addition to the HP SIM software, the CMS maintains a database for storage of persistent objects that can reside locally or on a separate system. Typically, applications for the multiple-system aware (MSA) tools also reside on the CMS. However, these applications are not required to reside on the CMS. They can reside anywhere on the network.
Because the CMS is a system within the management environment, it manages itself as part of the domain. You can add the CMS as a managed system within another management domain if you want to manage the domain using a separate CMS.