IBM’s Relative Performance (rPerf) metric is a great tool for comparing commercial workload performance between different Power System servers. It’s often. This post outlines a recent Nigel Griffiths tweet about estimating rperf for your LPAR. Read on to find out more. Articles on IBM AIX performance including server throughput, system performance and IBM AIX commands.

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This is especially important for older, single threaded applications that cannot exploit the benefits of SMT. We use cookies to optimize your visit to our website. How will the script get updated? Particularly as you move to larger servers, the topology of the cores and memory that are used can have a big effect on the cache and memory affinity of the LPAR and thus rprf a big effect on the actual performance.

There is no way to convert a roltp number to a rPerf. We’ll focus on the rPerf benchmark, which is an estimate of commercial processing performance, relative to other pSeries systems, used by IBM. The model simulates some of the system operations, such as CPU, cache and memory. Specifically, a computer benchmark is a computer program that performs a strictly defined workload set of operations and returns some form of measurable result i.

Instead, the analyst has decided to use standard benchmark results to size the new hardware. If you would like to change your cookie settings at any time please view our privacy policy for additional information. For workload migrations and server consolidation projects, rPerf data is frequently used for CPU sizing.


If you want to know what rperf used to work out your rating use: How do I use the vio If capped should the script use Entitlement and rpert VP?

How to Use rPerfs for Workload Migration and Server Consolidation

Previous Entry Main Next Entry. We use cookies rpdrf optimize your visit to our website. If you are break just one or two and then only a little bit then you never know – “you might get lucky”. Disk Flash Servers Software Tape. You have to be realistic and xix that you will need to be able to move up to later levels of software and firmware to take advantage of improvements.

Latest AIX with Service Packs – like all benchmarks, the best operating system version is used to get those latest performance fixes and improvements.

The script will give a lower than actual rPerf number. Some of the more notable benchmark suites are Standard Performance Evaluation Corp.

Free VMware and AIX Performance Monitoring

This is normal tuning like disk queue depth, memory use, large network packets. Implement these techniques to improve data-center resiliency. I call these my Ten Golden Rules or considerations to remember while using rPerfs for sizing. The rperf numbers are only available for certain number of CPUs. If it says estimated then it is NOT an official number. Second, rPerf numbers are expressed in terms of throughput as opposed to speed.


There are many pitfalls in using benchmarks in computer sizing endeavors.

rPerf Definition from PC Magazine Encyclopedia

If you would like to change your cookie settings at any time please view our privacy policy for additional information. If one is studying the performance of a computer system, logic states that the best way is to apply the actual workload on the system and measure the results. For LPARs the number may be estimated but it is a simple maths calculation i. There is no simple way to convert from roltp to rPerf alx sorry.


AIXpert Blog Log in to participate. However, there are times when this approach isn’t possible.

Bug Free – users have to be willing to upgrade firmware, AIX and application software, as necessary. Note, although rPerf may be used to compare estimated IBM UNIX dperf processing performance, actual system performance may vary and is dependent upon many factors, including system hardware configuration, software design, and configuration.