z/OS DFSMS Managing Catalogs
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Enhanced Catalog Sharing (ECS) Mode Sharing

z/OS DFSMS Managing Catalogs
SC23-6853-00

This sharing protocol stores the information that describes changes to a shared catalog in the Coupling Facility. The I/O required for the VVDS mode protocol is eliminated, resulting in better sysplex-wide performance.

This protocol is used when three conditions are satisfied:
  • The ECS cache structure is defined in a coupling facility that uses an installation-defined Coupling Facility Resource Manager (CFRM) policy
  • A successful connection has been made to the ECS cache structure
  • A catalog is referenced that has the ECSHARING attribute set

For additional information on enabling this protocol, see Using Enhanced Catalog Sharing Mode.

Parent topic: Catalog Sharing Protocols

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