z/VM Overview

The z/VM hypervisor extends the capabilities of z Systems and LinuxONE environments from the standpoint of sharing hardware assets, virtualization facilities, and communication resources. Together with IBM Wave, the comprehensive administration solution for z/VM-based virtual Linux server environments, z/VM makes it easier to receive the maximum value from large-scale virtual server hosting on z Systems and LinuxONE. This includes software and personnel savings, operational efficiency, power savings, and optimal qualities of service. This virtualization technology is designed to enable organizations to run hundreds to thousands of Linux servers on a single IBM z Systems or LinuxONE server with the highest degrees of efficiency and elasticity, running with other z Systems operating systems, such as z/OS and z/VSE, or as a large-scale enterprise LinuxONE server solution.

With z/VM and its Linux infrastructure, you can reduce the time between deciding on the acquisition of new servers and then implementing them because new servers can be easily deployed in a matter of minutes. With this powerful capability, you can launch new products and services without the exhaustive planning for purchasing, installing, and configuring new hardware and software that can be associated with conventional discrete hardware servers. Development groups that need test environments that are built and rebuilt rapidly to enable them to efficiently deliver their projects, handling change management in the process, can also benefit from this unique advantage.

IBM z/VM V7.1 delivers:

  • Implementation of the z/VM Continuous Delivery model.
  • Withdrawal of the Single System Image (SSI) feature and integrates the SSI function in the base, at no additional cost.
  • Increases the level of engagement within the z/VM user community.
  • Enhances the dump process to reduce the time required to create and process dumps.
  • Upgrade to a new Architecture Level Set. This requires IBM zEnterprise EC12 or BC12, or later, IBM Z servers.

For more details, refer to the z/VM V7.1 Resource page


IBM z/VM V6.4 delivers:

  • Support for up to 2 TB of memory that enables:
    • Higher levels of workload consolidation
    • Considerable growth in memory-intensive applications
    • Superior levels of elasticity for workload spikes
  • Increased efficiency with HyperPAV paging that takes advantage of IBM DS8000 features to increase the bandwidth for paging and allow for more efficient memory management of over- committed workloads
  • Easier migration with enhanced upgrade-in-place infrastructure that provides an improved migration path from previous z/VM releases
  • Improved operations with ease-of-use enhancements requested by clients that include:
    • Querying service applied to the running hypervisor
    • Providing environment variables to allow programming automation, based on systems characteristics and client settings
    • Improved query capabilities for system shutdown
  • Improved Small Computer System Interface (SCSI) support for guest attachment of disk and other peripherals, and hypervisor attachment of disk drives to z Systems and LinuxONE systems to:
    • Increase efficiency by allowing an IBM FlashSystem to be attached to z/VM for system use without the need for an IBM System Storage SAN Volume Controller (SVC)
    • Enable ease of use with enhanced management for SCSI devices to provide informationon systems characteristics and client settings needed about device configuration characteristics
    • Allow concurrent code loads on the SVC, and devices incorporating SVC technology, without quiescing EDEVICE I/O
  • Increased scalability by exploiting Guest Enhanced DAT to allow virtual machines to take advantage of large (1 MB) pages, decreasing the memory and overhead required to perform address translation
  • Integration of new CMS Pipelines functionality, not previously incorporated within z/VM, that allows a much more inclusive set of tools for application developers
  • Availability of IBM Wave for z/VM as an optional, priced feature

For more details, refer to the z/VM V6.4 Resource page