With server virtualization, you can create multiple virtual servers on a single physical server. Each virtual server has its own set of virtual hardware on which operating systems and applications are loaded. IBM systems with virtualization can prioritize system resources and allocate them dynamically to the virtual servers that need them most at any given time—all based on business priorities.
Virtualization was first introduced by IBM in the 1960s to allow the partitioning of large mainframe environments. IBM has continued to innovate around server virtualization and has extended it from the mainframe to the IBM Power Systems, IBM System p, and IBM System i™ product lines. In the industry-standard environment, VMware, Microsoft® Virtual Server, and Xen offerings are available for IBM System x and IBM BladeCenter systems. Today, IBM server virtualization technologies are at the forefront in helping businesses with consolidation, cost management, and business resiliency.
IBM recognized the importance of virtualization with the development of the System/360 Model 67 mainframe. The Model 67 virtualized all of the hardware interfaces through the Virtual Machine Monitor, or VMM. In the early days of computing, the operating system was called the supervisor. With the ability to run operating systems on other operating systems, the term hypervisor resulted (a term coined in the 1970s). Logical partitioning has been available on the mainframe since the 1980s. The Power team began taking advantage of the mainframe partitioning skills and knowledge about 10 years ago and brought forth Dynamic LPARs with POWER4™ and then Advanced POWER Virtualization with POWER5™ in 2004 (which was re-branded to PowerVM™ in 2008).
There are several types of virtualization.1 In this chapter, we describe them in order to position the relative strengths of each and relate them to the systems virtualization offerings from IBM and IBM Business Partners.
Source : IBM Systems Virtualization : System, Application, Software
Virtualization was first introduced by IBM in the 1960s to allow the partitioning of large mainframe environments. IBM has continued to innovate around server virtualization and has extended it from the mainframe to the IBM Power Systems, IBM System p, and IBM System i™ product lines. In the industry-standard environment, VMware, Microsoft® Virtual Server, and Xen offerings are available for IBM System x and IBM BladeCenter systems. Today, IBM server virtualization technologies are at the forefront in helping businesses with consolidation, cost management, and business resiliency.
IBM recognized the importance of virtualization with the development of the System/360 Model 67 mainframe. The Model 67 virtualized all of the hardware interfaces through the Virtual Machine Monitor, or VMM. In the early days of computing, the operating system was called the supervisor. With the ability to run operating systems on other operating systems, the term hypervisor resulted (a term coined in the 1970s). Logical partitioning has been available on the mainframe since the 1980s. The Power team began taking advantage of the mainframe partitioning skills and knowledge about 10 years ago and brought forth Dynamic LPARs with POWER4™ and then Advanced POWER Virtualization with POWER5™ in 2004 (which was re-branded to PowerVM™ in 2008).
There are several types of virtualization.1 In this chapter, we describe them in order to position the relative strengths of each and relate them to the systems virtualization offerings from IBM and IBM Business Partners.
Source : IBM Systems Virtualization : System, Application, Software
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