IBM ZSERIES 890 - Manual (Page 5)

expenses into regular monthly
payments. This flexibility can help you
to overcome current budget
restrictions, better manage your
expenses, and eliminate hardware
disposal issues.
An open, flexible server
The z890 offers the flexibility to
manage numerous operating systems
on a single server, including z/OS,
OS/390, z/VM, VM/ESA, VSE/ESA,
TPF and Linux for zSeries and
Linux for S/390.
While zSeries servers support a
number of different operating
systems, their most advanced
features are optimised for z/OS. z/OS
is the foundation for the future of
zSeries. It is designed and developed
to quickly respond to the demanding
quality of service requirements for the
on demand business environment.
z/OS easily allows you to physically
scale up to the amount of server
capacity you need. It is designed to
deliver high qualities of service for
enterprise transactions and data, and
extends these qualities to new
applications using some of the latest
software technologies. It provides a
security-rich, scalable, high-
performance base on which to
deploy Internet and Java
applications, providing a
comprehensive and diverse
application execution environment.
Unique to the z890 and the z800 is
z/OS.e – a specially-priced product
offering with a select subset of z/OS
functionality that is designed to make
the deployment of new applications
on these servers attractively priced.
Not only does z/OS.e use the same
code base as z/OS with custom
parameters, it also provides a stable
operating environment comparable to
z/OS in service, management,
reporting and reliability. Best of all, no
new skills or service procedures are
required for z/OS customers who
wish to exploit z/OS.e.
z/VM, strategic to Linux and new
workloads on zSeries, uses
established virtualisation technology
as a foundation to offer Virtual
Machine (VM) capabilities on a
mainframe. It allows you to virtualise
processor, communications, storage
I/O and networking resources to help
minimise the planning, purchasing
and installation of new hardware to
support additional workloads. An
ideal environment for consolidating
servers and simplifying the
infrastructure, z/VM enables you to
run up to hundreds of Linux images
simultaneously on a single server –
helping to reduce both cost and
complexity – while benefiting from the
reliability and availability of the z890.
The z890 provides important
improvements to the QDIO
architecture to help improve
performance and may help minimise
the overhead of running Linux and
other virtual server guests running
under z/VM V4 or later. The Linux
open standards-based platform
supports rapid application portability
which can be adapted to suit
changing business needs. zSeries
enables massive scalability within a
single server. Linux and z/VM can
take advantage of the zSeries
capacity by allowing you to run many
virtual blade servers simultaneously,
so you can scale out virtually for high
utilisation while helping to lower the
cost of ownership.