Server Virtualization: The Essentials · Administration complexity ... Solaris. Solaris Hypervisor. Operating system knows about both virtual and physical ... Server Virtualization:
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Server Virtualization: The Essentials• What is virtualization? • Why consolidation and virtualization?• Advantages of Virtualization• Disadvantages of Virtualization• Different Approaches• CPU Measurements
Virtualization creates a level of indirection or an abstraction layer between a physical object and the managing application.
Storage virtualization refers to the presentation of a simple file, logical volume or other storage object (ie. disk drive) to an application in such a way that allows the physical complexity of the storage to be hidden from both the storage administrator and theapplication.
Virtualization involves the process of presenting computing resources in ways that users and applications can easily get value out of them, rather than presenting them in a way dictated by their implementation, geographic location, or physical packaging.
Virtualization is an abstraction layer that decouples the physical hardware from the operating system to deliver greater IT resource utilization and flexibility.
Single “host” OSPhysical CPUs visible to the host OS“Guest” OS sees virtual CPUs
Software
Hardware
Applications
VMware ESX
Applications
CPU CPU CPU CPU
Windows Linux
Presenter
Presentation Notes
Single “host” operating system instance controls all CPUs and knows their usage. “Guest” operating systems don’t know about physical CPUs. Guests know about virtual CPUs.
Different Approaches: Software, Windows Virtual Server
Single “host” OSPhysical CPUs visible to the host OS“Guest” OS sees virtual CPUs
Software
Hardware
Applications
Windows
Applications
CPU CPU CPU CPU
Windows Windows
Windows Virtual Server
Presenter
Presentation Notes
Single “host” operating system instance controls all CPUs and knows their usage. “Guest” operating systems don’t know about physical CPUs. Guests know about virtual CPUs.
Traditional CPU measurements now have very different meaningsCPU measurements are gathered from operating system APIsPay close attention to where you look for CPU resource usageThere is still real hardware somewhere
What happens to response times when activity changes?When will my guest get “full”?When will my application activity exceed my server capacity?When will my application activity exceed my cluster capacity?TeamQuest solutions tell you what you will need before you need it
Presenter
Presentation Notes
Modeling Predicts the level of activity where architectural limits exist or bottlenecks occurs. Based on this information, we can devise a plan to deal with potential issues before the running applications encounter them. Predicts the effects of changes in business activity. We can determine when hardware upgrades or expansion may need to take place. Predicts the effects of configuration changes. We can determine the appropriate configuration to satisfy service level objectives. Modeling helps tell you what you need before you need it.
For more discussion on this topic, please contact Jim Smith at: [email protected]
To view demos on how to better manage the capacity of virtualized VMware ESX, Sun Solaris and IBM AIX server environments, simply close this video and return to the TeamQuest website
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