Red Hat LINUX VIRTUAL SERVER 4.6 - ADMINISTRATION Installationshandbuch PDF herunterladen (Seite 21)

Chapter 1. Introduction to z/VM and Linux

Virtualization is an important topic in the IT industry. The IBM z/VM mainframe and its

predecessors have been performing virtualization for four decades. Today, it is the most

functionally rich virtualization platform available. When Linux was ported to IBM mainframes

in 2000, it was a natural fit to run under z/VM. You can run many tens of Linux images on the

same IBM System z logical partition (LPAR). Some customers are running hundreds in

production mode.

With a z/VM and Linux infrastructure, you can reduce the time between deciding on the

acquisition of new servers and then implementing them because new servers can be

deployed in a matter of minutes. This powerful build and clone capability can enable you to

launch new products and services without the exhaustive planning, purchasing, installing,

and configuring of new hardware and software that can be associated with conventional and

discrete hardware servers. Development groups who need test environments built and rebuilt

rapidly to enable them to efficiently deliver their projects and handle change management in

the process can also benefit from this unique advantage.

Some of the mainframe’s and z/VM’s best strengths are:

򐂰 Their virtualization capabilities are more mature and robust than any other hardware and

hypervisor combination.

򐂰 z/VM provides a rich, functional, and sophisticated level of systems management that can

greatly help run large numbers of Linux servers.

򐂰 The z/VM virtual switch (VSWITCH) makes the networking of Linux much simpler.

򐂰 Full volume backup of systems allows for complete disaster recovery when another data

center is available.

򐂰 z/VM is one of the easiest operating systems to customize at the base installation level.

There is only a relatively small number of configuration files. Properly set up, z/VM can run

for months with little maintenance or administration required.

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Red Hat LINUX VIRTUAL SERVER 4.6 - ADMINISTRATION Installationshandbuch Seite 21