Coupling facility requirements

IMS 15.3 is the last IMS release that supports coupling facility levels associated with IBM® z10 EC, z10 BC, z196, and z114 processor types (CF levels 15 through 17).

System-Managed CF Structure Duplexing is recommended, though not required, for the Resource Manager resource structure.

A coupling facility level of 15 or later is required for the following functions:

• Operations Manager (OM) Audit Trail, if a coupling facility log stream is used
• Parallel RECON access support
• Repository Server Audit Log, if a coupling facility log stream is used
• Resource Manager (RM), if a resource structure is used
• Shared-EMH support
• Shared queues
• Sysplex data sharing (including data caching and VSO data sharing) with Internal Resource Lock Manager (IRLM) V2.3