Identifying primary CMASs

You must identify a primary CMAS to enable system availability monitoring and analysis point monitoring.

To enable system availability monitoring.
To do this, you must change the CICS® system definition to identify the CMAS to which the CICS system normally connects. This primary CMAS is used to assist in distributing real-time analysis processing. That is, when the first CMAS involved in managing a CICSplex is started, it monitors all CICS systems comprising the CICSplex. As subsequent CMASs start, they begin monitoring the systems for which they are the primary CMAS. Over time, this helps to distribute monitoring across all of the CMASs involved in the CICSplex.
To enable analysis point monitoring.
To do this, you can identify a primary CMAS and one or more secondary CMASs.
- The existence of an analysis point specification causes analysis point processing to be activated when the CMAS identified as its primary CMAS is started.
  When you identify one primary CMAS, all CICSplex-level processing occurs within that CMAS. As an alternative, you can partition the CICSplex at the CMAS level. That is, each CMAS participating in the management of a CICSplex may process one or more analysis point specifications. This mode of operation allows greater flexibility when managing a CICSplex being managed by multiple CMASs. Note that this partitioning does not preclude any CMAS from acting on CICS systems attached to other CMASs.
- Optionally, you can associate the analysis point specification with one or more secondary CMASs. This identifies the CMAS that is to take over if the primary CMAS becomes unavailable. When the primary CMAS is inactive, the active secondary CMAS with the lowest alphabetical SYSID will take control of the analysis point specification.