APPC/MVS distributed application support

Advanced Program-to-Program Communication for Multiple Virtual Storage (APPC/MVS) is a major evolutionary change to MVS for applications that need to connect and communicate across the enterprise. APPC/MVS is an implementation of Systems Network Architecture (SNA) LU 6.2 session-defined protocol. This new MVS environment includes services to enhance the creation, execution, and management of MVS peer-to-peer and client/server applications. In addition to providing connectivity and communications services, APPC/MVS also has scheduling facilities for managing concurrent work originating from other systems in the enterprise network. The objective of this paper is to survey these facilities by examples of usage and by relationships to existing MVS services. Topics include various types of distributed models and approaches, design considerations, and characteristics that represent candidates for an APPC/MVS implementation. Relationships of the APPC/MVS environment with the Customer Information Control System/Enterprise Systems Architecture (CICS/ ESA™), Information Management System/ Enterprise Systems Architecture Transaction Manager (IMS/ESA™ TM), Time Sharing Option Extensions (TSO/E), and batch environments are included.