IBM z/VM is the premier mainframe virtualization platform, supporting
more virtual servers than any other in a single footprint. It provides
industry leading capabilities to efficiently scale both horizontally and
vertically, enabling clients to support growing business demands while
lowering the cost of service delivery. Long recognized as a robust
virtualization computing platform, 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, IBM z System.
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 can also help to improve productivity by hosting
non-Linux workloads such as z/OS, z/VSE, and z/TPF.
Offering more efficient use of resources for improved price
performance with support for IBM z13
z/VM 6.3 provides support for multi-threading technology that extends
per-processor core capacity growth beyond single-thread performance for
Linux on z Systems IFL workloads with support for two threads per core
in IBM z13 (z13). z/VM multi-threading technology support enables
additional price performance benefits over previous hardware generations
and meets workload requirements transparently. This design allows the
z13 to deliver additional capacity across a wide range of CPU
utilization for Linux workloads, crucial for mission critical
applications and cloud service delivery.
z/VM V6.3 multi-thread support increases the capacity of z/VM to perform
multiple units of work simultaneously. When multiple virtual machines
are active, multi-threading allows more of them to execute at the
same time, increasing overall throughput.
This can lead to completing more transactions,
faster response times, and increased resource utilization. In addition,
z/VM multi-threading support is transparent to guests; no guest
customization or exploitation is required.
In conjunction with multi-threading support, CPU scalability has been
enhanced in z/VM 6.3 to support up to 64 dispatching units. As a result,
on z13, z/VM 6.3
supports up to 64 cores without multi-threading enabled or up to 32
cores (and thus up to 64 threads) with multi-threading enabled.
IBM z Systems Cryptographic features are designed to satisfy high-end
server security requirements. They can be configured as coprocessors for
secure key transactions or as accelerators for Secure Sockets Layer
communications, providing significant improvements in the performance of
cryptographic algorithms used for encryption and public-private key pair
generation and verification.
z/VM now supports the Crypto Express5S feature, a tamper-resistant
cryptographic coprocessor, available to guests with either dedicated
access for use in both secure-key and clear-key operations or with
shared access for clear-key operations. z/VM can virtualize z Systems
cryptographic devices so they can be shared by many Linux systems and
supports greater than 16
domains for Crypto Express4S and Crypto Express5S.
z/VM can balance the workload across multiple cryptographic devices, and
should one device fail or be brought offline, z/VM can transparently
shift Linux systems using that device to an alternate cryptographic
device without user intervention.
Leading the industry with increased availability and reduced cost
of ownership in network environments
z/VM 6.3 provides Multi-VSwitch Link Aggregation Support. This
functionality, new with IBM z13, allows a port group of OSA-Express
features to span multiple virtual switches within a single z/VM system
or between multiple z/VM systems. Sharing a Link Aggregation Port
multiple virtual switches increases optimization and utilization of the
OSA-Express when handling larger traffic loads. Higher adapter
utilization protects customer investments, which is increasingly
important as 10 Gigabit deployments become more prevalent. This
enhancement makes it possible to do VSwitch Link Aggregation with OSAs
shared with other z/VM logical partitions, lifting the previous
restriction of requiring dedicated OSAs.