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Linux System Administration
book

Linux System Administration

by Tom Adelstein, Bill Lubanovic
March 2007
Intermediate to advanced content levelIntermediate to advanced
304 pages
11h 12m
English
O'Reilly Media, Inc.
Content preview from Linux System Administration
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Chapter 9: Virtualization in the Modern Enterprise
The need for staff to specialize into functional areas where you will find a lack of
documentation and high levels of personnel turnover
The need to train and support users and administrators and keep software up-to-
date
Now you might understand why enterprise virtualization has gained popularity and
become one of the few areas where technology can change the business landscape.
With virtual images, you can easily compress your data together with all the pro-
grams, configuration settings, operating system libraries, and other metadata that
make a whole system. Restoring an image restores the system exactly as it was run-
ning at the time, thus making it easier to reproduce documents. Virtualization has
the following benefits:
It replaces wasteful arrays of systems with fewer, better-utilized systems.
It simplifies administration, because separate kernels with one application run-
ning on each are more secure and manageable than one kernel running many
applications. It also maintains the environment in which documents were cre-
ated, to meet regulatory requirements.
Reduced hardware and complexity allows reduced staff.
Virtualization may help reverse the trend of server sprawl.
High-Performance Computing
Linux has become the preferred host operating system for virtual machines because
of its ability to run and manage massive PC
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Publisher Resources

ISBN: 9780596009526Supplemental ContentCatalog PageErrata