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Initialization Parameter

The members of the configuration are specified by the Snn initialization parameter. For example:

S1 SID=A158
S2 SID=B158

This defines a two-system configuration, where A158 and B158 are the SMF system IDs set during the IPL of the systems (or overridden by the SID initialization parameter). One system must initially do a CA Spool cold start with no other systems active, and must define all members of the configuration. Other members join operations by a warm start and must also specify identical Snn parameters. A cold start is required to change or add members of the configuration. If only one or no Snn parameter is specified,
CA Spool operates as a single system.