Live updating opeating systems using virtualization

Businesses are turning to Power VM server virtualization to consolidate multiple workloads onto fewer systems, increasing server utilization and reducing cost.

Power VM provides a secure and scalable server virtualization environment for AIX, IBM i and Linux applications built upon the advanced RAS features and leading performance of the Power Systems platform.

VM clustering technology is also evolving, allowing multiple copies of the same VM to remain synchronized across physical systems.

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Virtualization provides a variety of options to protect workloads.

Snapshots can capture the precise state of each virtual machine to disk, allowing fast restoration and restarts.

Virtual systems allow for a high degree of security, portability, and ease of use.

However, they are resource-intensive, so a balance needs to be found, and virtualization needs to be used according to the resources of the organization.

Imagine only being able to run one software program at a time on your computer.

What if, in order to check your email, you had to turn off your office application?

This chapter covers the Comp TIA Security SY0-201 objectives 1.3 and 1.6.

Imagine a computer with a freshly installed server operating system (OS) placed on the Internet or on a DMZ that went live without any updating, service packs, or hotfixes.

Virtualization is being used by a growing number of organizations to reduce power consumption and air conditioning needs and trim the building space and land requirements that have always been associated with server farm growth.

Virtualization also provides high availability for critical applications, and streamlines application deployment and migrations.

The best time to refresh hardware, however, is different for every business. Although it won't directly impact a server's service life, virtualization can extend refresh cycles by making the server's computing resources available to more workloads, and allowing workloads to be migrated on-demand between server hardware platforms.