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SAP on VMware Sizing & Design Example

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Recently in partner workshops I have come across some interesting discussions about the impact of hyper-threading and NUMA in sizing business critical applications on VMware. So here is an SAP example based on SAP’s sizing metric “SAPS” (a hardware-independent unit of measurement that equates to SAP OLTP throughput of Sales and Distribution users).  The examples here refer to vSphere scheduling concepts in this useful whitepaper The CPU Scheduler in VMware vSphere 5.1 .

SAP sizing requires the SAPS rating of the hardware which for estimation purposes can be obtained from certified SAP benchmarks published at http://www.sap.com/solutions/benchmark/sd2tier.epx . Let’s use certification 2011027  and assume that we plan to deploy on similar hardware as used in this benchmark. This is a virtual benchmark on vSphere 5 with the following result: 25120 SAPS (at ~100% CPU) for 24 vCPUs running on a server with 2 processors, 6 cores per processor and 24 logical CPUs as hyper-threading was enabled. This is a NUMA system where each processor is referred to as a NUMA node.  (Note cert 2011027 is an older benchmark, the SAPS values for vSphere on newer servers with faster processors would be different/higher, hence work with the server vendors to utilize the most recent and accurate SAPS ratings).

To learn more and to read the entire article at its source, please refer to the following page, Virtualize Business Critical Applications Blog: SAP on VMware Sizing & Design Example- VMware Blogs

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