What is z/VM?

IBM® z/VM® is a highly secure and scalable hypervisor and virtualization technology for cloud infrastructure and for running critical applications. IBM z/VM supports Linux®, z/OS®z/VSE® and z/TPF operating systems on IBM Z® and LinuxONE servers. It can host thousands of virtual servers on a single system.

What’s new for z/VM?

IBM z/VM 7.2 and new z/VM capabilities can simplify the process for deploying maintenance across multiple non-SSI z/VM systems, and will provide greater availability and data redundancy for GDPS environments.

z/VM 7.2 has achieved in accordance with the Operating System Protection Profile (with Virtualization and Labeled Security extensions) an assurance level of EAL 4+ (link resides outside of ibm.com)(PDF, 555 KB).


Hybrid cloud capabilities

IBM z/VM, together with Linux, IBM Cloud Paks® and Red Hat® OpenShift® on IBM Z and LinuxONE provides a highly scalable, secure, and efficient on-premises cloud infrastructure for a hybrid multicloud architecture.

Workload performance

IBM tests indicate the IBM z15™ multi-frame system requires 23X fewer cores than compared x86 servers, and a 20% lower overall 5-year TCO when running mixed workloads consisting of open source and IBM proprietary software.¹

Key virtualization features of z/VM software

z/VM Single System Image

This clustering technology helps reduce planned outages and balance workloads across z/VM systems.

z/VM Performance Toolkit

This toolkit provides enhanced capabilities to monitor and report performance data.

RACF Security Server

Robust security software for virtualization helps protect your z/VM and guest system resources.


IBM Directory Maintenance (DirMaint™) for z/VM helps manage z/VM’s user directory.

Additional VM software and solutions to complement z/VM

Software for systems management

Manage z/VM and Linux systems with a complete solution

Get your enterprise view of performance

Automate and monitor your z/VM systems and its guests

Simplify infrastructure management of z/VM-based Linux virtual machines

Solutions for backup and protection

Protect and manage tape

Back up z/VM data safely

Storage for virtualization

How to deploy Linux servers on z/VM

System programmers and administrators
Discover how to configure and use z/VM functions and facilities for Linux on Z.

Hear from customers

With z/VM, we can dynamically re-allocate and cap resources. This is particularly valuable for our developers, because it helps ensure that the applications that we build are lean and can run in lower-provisioned environments.”

– Mike Riggs, Director of Judicial Information Technology, Supreme Court of Virginia


VM product education

IBM Skills Gateway

Live virtual classes

¹DISCLAIMER: This is an IBM internal study designed to replicate a typical IBM customer workload usage in the marketplace. Results may vary. The workloads consisted of an airline flight reservation system (running MongoDB and node.js) and a transactional core banking application (running WAS and Db2). Four instances of the airline system were run, one instance simulating a Dev/QA environment, and three instances simulating a Production environment. The total number of IBM Z cores needed to deliver the workloads was 28. Both the x86 and z15 environments had access to the same storage array. Total Cost of Ownership is defined here to include hardware, software, labor, networking, floor space and energy costs over a period of 5 years. IBM internal hardware list prices were used. x86 server prices were acquired from IDC. IBM software pricing was standard list prices with 20% discount applied. For more details contact the IT Economics team at IBM.