2012 - Red Hat Enterprise Linux KVM Hypervisor I/O: Red Hat and IBM Demonstrate Top Virtualization Performance with KVM on IBM's x3850X5

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This paper describes the test environment which is comprised of an IBM System x3850 X5 host server with QLogic® QLE 256x Host Bus Adapters (HBAs), Red Hat® Enterprise Linux 6.3 hypervisor, and Red Hat Enterprise Linux 6.3 guests. The test results validate that a single KVM guest can handle more than 800,000 I/Os per second (IOPS) and four KVM guests running on the same host can support an aggregate I/O rate of more than 1.4 million IOPS – hitting the “bare-metal” limit of the test storage setup. These results show that KVM can achieve the highest storage I/O performance in a virtualized environment and is ready for the most demanding enterprise workloads.

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