Access "Preventing virtual resource oversubscription with capacity management"
This article is part of the June 2011, Vol. 33 issue of Time to consider a second hypervisor?
In today’s data centers, organizations are packing more virtual machines (VMs) onto fewer physical servers. That's great for server consolidation, but it could lead to oversubscription of CPU cycles, memory and other computing resources. In this tip, I’ll identify the symptoms of resource oversubscription and offer capacity management suggestions that can limit or prevent it. Server and desktop consolidation raises concerns that concentrations of workloads bring with them inevitable risk of downtime and the potential of oversaturation of the core computing resources—memory, processor, network and disk. In the ideal world, a hypervisor should be consuming these resources as much as possible, while leaving headroom to accommodate the growth in the VMs as well any unexpected surges in workload. Expressed simply, a hypervisor consuming only 1% of memory, CPU, network or disk is underutilized. Likewise, a hypervisor running at 99% of memory, processor, network or disk is likely to provide poor performance and be a major bottleneck in any clustered environment. ... Access >>>
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Should your IT shop consider multiple server virtualization platforms?
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More and more IT shops are implementing multiple server virtualization platforms to increase interoperability and abstraction as well as lower costs.
Preventing virtual resource oversubscription with capacity management
by Mike Laverick
Identify the symptoms of resource oversubscription, and learn capacity management strategies to prevent it.
- Should your IT shop consider multiple server virtualization platforms? by Stephen J. Bigelow
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