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Performance of vSphere Flash Read Cache in VMware vSphere 5.5

Publisher:
VMware

Latest Revision:
Aug 26, 2013

Download:
http://www.vmware.com/files/pdf/techpaper/vfrc-perf-vsphere55.pdf

Description

vSphere Flash Read Cache (vFRC) is a feature in vSphere 5.5 that utilizes the vSphere Flash Infrastructure layer to provide a host-level caching functionality for virtual machine I/Os using flash storage. The goal of introducing the vFRC feature is to enhance performance of certain I/O workloads that exhibit characteristics suitable for caching. In this paper, we first present an overview of the vFRC architecture, detailing the workflow in the read and write I/O path. We then show some of the workloads that perform better vFRC through detailed test results. We conclude the paper with performance best practices guidelines when using vSphere Flash Read Cache.


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