Study z/VM

 VM (Virtual Machine) has long been recognized as a robust computing platform, spanning the family of IBM mainframe servers.

z/VM® offers a base for customers who want to exploit IBM virtualization technology on one of the industry's best-of- breed server environments, the IBM System z® family. With virtualization technology, customers can easily create many virtual machines consisting of virtualized processor, communications, storage, networking, and I/O resources.

The z/VM hypervisor is designed to help clients extend the business value of mainframe technology across the enterprise by integrating applications and data while providing exceptional levels of availability, security, and operational ease. z/VM virtualization technology is designed to allow the capability for clients to run hundreds to thousands of Linux® servers on a single mainframe running with other System z operating systems, such as z/OS®, or as a large-scale Linux-only enterprise server solution. z/VM V6.1 and V5.4 can also help to improve productivity by hosting non-Linux workloads such as z/OS, z/VSE, and z/TPF.

z/VM consists of the following components and facilities (base products):
Control Program (CP)
Conversational Monitor System (CMS)
Transmission Control Protocol/Internet Protocol (TCP/IP) for z/VM
Advanced Program-to-Program Communication/Virtual Machine (APPC/VM)
Virtual Telecommunications Access Method (VTAM®) Support (AVS)
Dump Viewing Facility
Group Control System (GCS)

 

CP/CMS  ( Control Program/Cambridge Monitor System ) was a  time-sharing   operating system  of the late 60s and early 70s, known for its excellent performance and advanced features. It had three distinct versions.

 

CP is the resource management,just like the linux kernel, it can't read the file system.

CMS is the operation system to the end user, and it can manage files ,communicate with other users. and the SFS and minidisk file management.