Online Esa Concepts Of Mainframe eLearning

OS 390 VM Concepts and Facilities The OS/390 VM course describes the main features of the VM/ESA operating system. It introduces the "virtual machine" concept, the implementation of that concept in VM/ESA, the CMS environment, other operating environments, and system operation facilities. This course is written to OS/390 2.x. This course is designed as an introductory course for users, programmers, operators, managers who are new  more...

OS 390 MVS ESA Fundamentals of VSAM Part I This course covers the concepts needed to design, or code, applications that use the Virtual Access Storage Method (VSAM). It begins with an overview of VSAM, describes what VSAM does for application programs that request its services, the four types of VSAM datasets, followed by a detailed explanation of the VSAM entry-sequenced dataset. The course then examines the physical organization of a  more...

OS 390 MVS ESA Fundamentals of VSAM Part II This course explains how VSAM adds and deletes records to and from a KSDS. It describes how VSAM manages the space within the data components of the KSDS when it performs additions or deletions. Also covered is the organization and function of an alternate index, how and when an alternate index can be used, and how an alternate index relates to an existing ESDS or KSDS. It describes the role that  more...

CICS ESA Concepts This course explains the basics of the Customer Information Control System (CICS). It focuses on the single-system environment but also discusses CICSplex and other CICS intercommunication facilities. CICS is IBM's general purpose online transaction processing (OLTP) software, which is used by many organizations to handle transaction processing needs.Some topics discussed in this course are online  more...