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jsc_dataset

All Primary and Secondary agents that belong to the same group must use the same UNVJSC VSAM cluster.

This cluster must be allocated on shared DASD that is available to all members in the Sysplex.

Agents that are not part of the Sysplex group must use a different VSAM cluster.

cf_struct_name

Name of the Coupling Facility structure which will be used to store the XCF Message Queue.

All Primary and Secondary agents that belong to the same group must use the same structure. The structure should not be shared between agents that are not part of the same Sysplex group.

If the value of the sysplex_role parameter in UBRCFG00 is primary or secondary, this parameter can be used to control automatic failover.

Automatic failover allows a Secondary agent to become the Primary agent when the original Primary agent ends.

Valid values:

• never
  Automatic failover will not  occur. Manual failover is still available.
• always_primary
  For agents configured as Primary agents only. This agent should always be Primary. If another Primary agent is active when this agent starts, that agent will become a Secondary agent. If this agent cannot be a Primary  agent, it will shut down.
• primary_secondary
  For agents configured as Primary agents only. This agent will try to start as a Primary agent. If another Primary agent is already active, this agent will become a Secondary agent. Itbecomes It becomes first in the ranking to become Primary during failover.
• secondary_primary[n]
  For agents configured as Secondary agents only: This agent will start as a Secondary agent. When the Primary agent ends, this agent is eligible to become the Primary agent.
  • An optional integer [n] can be appended to this value. The integer controls the ranking of multiple Secondary agents during failover. A lower number means a higher priority in the failover ranking.
  • When multiple agents have the same ranking, the agent that started earliest will be considered to have a higher ranking.
  • Default for [n] is 1. The range is 1-32.

Default is never.

(Also see the AUTOMATIC_FAILOVER UAG configuration option.)