CA GTS operates under any z/OS operating system supported by IBM. Individual GTS clients may require minimum operating system levels higher than CA GTS itself.
CA GTS requires the IBM Integrated Cryptographic Services Facility (ICSF) to support encrypted transmissions. If unavailable, encryption is not supported.
CA GTS executes in any JES2 or JES3 environment supported by IBM.
CA GTS executes APF-authorized in the standard problem program key (protect key 8).
CA GTS installation and maintenance requires SMP/E.
CA GTS can use Cross Memory Services (XMS), Cross-Systems Communication Facility (XCF), and/or TCP/IP. Use of these services is controlled through user-specified parameters.
With releases prior to IBM z/OS V1.8, address spaces using Cross-Memory Services (XMS) in a space-switching mode would have the address space controlling the XMS environment (CA GTS) become unusable until after the next IPL. With z/OS V1.8, IBM has allowed these address spaces to become reusable. If a site is executing an earlier release of z/OS, it should be aware of this XMS restriction. See the GSINIT parameter XMEM if CA GTS should be started without using XMS.
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