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Saturday, April 27, 2013

Modeling the Online Application Migration from Sparc to AIX Platform

The complete set of slides for the presentation I made at SCMG Richmond meeting see here: http://itrubin.blogspot.com/2013/04/aix-frame-and-lpar-level-capacity.html
The presentation itself was recorded and published here:

Thursday, April 25, 2013

I. Trubin: AIX frame and LPAR level Capacity Planning. User Case for Online Banking Application

[1] Bob Chan: “Unix Server Sizing – Or What to do When There are No MIPS”, Proceedings of the Computer Measurement Group, 2000
§[2] Ray White and Igor Trubin: “System Management by Exception, the Final Part”, Proceedings of the Computer Measurement Group, 2007.
§[3] Linwood Merritt and Igor Trubin: “Disk Subsystem Capacity Management, Based on Business Drivers, I/O Performance Metrics and MASF ”, Proceedings of the Computer Measurement Group, 2004
§[4] Igor Trubin: “Exception Based Modeling and Forecasting”, Proceedings of the Computer Measurement Group, 2008
§[5] Igor Trubin: “IT-Control Chart“, Proceedings of the Computer Measurement Group, 2009
§[6] Jeffrey Buzen and Annie Shum: "MASF - Multivariate Adaptive Statistical Filtering", Proceedings of the Computer Measurement Group, 1995, pp. 1-10.
§[7] Igor Trubin: “How To Build IT-Control Chart - Use the Excel Pivot Table! “, “System Management by Exception” tech. blog www.itrubin.blogspot.com   
§[8] Linwood Merritt: “A Capacity Planning Partnership with the Business”, Proceedings of the Computer Measurement Group, 2004.

Thursday, April 18, 2013

Identify trends and anomalies by using wavelets - CMG'12 paper

Twelve years ago being hired as a Capacity Planner first time and not knowing anything about the specialty, I was asked to look at computer measurements to do any analysis. Applying my academic researcher skills I noticed that server's capacity usage usually shows different seasonality patterns (shifts, weekends, lunch times and so on); so my first impulse was to decompose that to several signals using Fourier Transform. I formulate the task to my manager, but for some reason (to much math and computing power requirements?) he suggested to use just standard statistical approaches instead, and I did…

I did develop and implement SEDS methodology (statistical exception detection) that naturally covers daily and weekly cycles and potentially can uncover monthly and yearly ones if there is enough data history to build baseline.

But Fourier analysis was still in my mind, and I have just been waiting for the time when our computational capacity would be enough to apply the method against system performance data….

That’s why I was positively surprised when I noticed the following paper in CMG’12 agenda:

Introduction to Wavelets and their Application for Computer Performance Trend and Anomaly Detection  Dima Seliverstov, BMC Software

ABSTRACT: This paper presents a technique to identify trends and anomalies in Performance data using wavelets.

And of course, I planed (see my past post here), attended and enjoyed that, I know Dima via other CMG events, spoke with him a few times and have already analyzed some other his papers in this blog (The Exception Value Concept to Measure Magnitude of Systems Behavior Anomalies).

His "wavelet" paper is about implementation of my old dream to use something like Fourier analysis and his idea of decomposing the performance data to combination of typical wavelets is a good attempt to do that. Especially impressive was to see the "Scalogram  that is a type of a heat-map to show the location of the energy as a function of frequency and time”: “Scalogram is a heat map for wavelets transformation”. Some interesting examples (including against VMware VCenter data) were presented and was calculated by MATLAB tool:

BTW stock market is already adopting this idea, the paper references that: Wavelets for Stock Market Analysis
Why not us?

… Ironically the same manager asks me now to analyze how business cycles drive capacity usage….

Tuesday, April 9, 2013

SCMG meeting in Richmond: AIX frame and LPAR level Capacity Planning

The CMG - Southern Region  meeting is scheduled April 25, 2013.  I will be presenting again my CMG'12 paper:

AIX frame and LPAR level Capacity Planning. User Case for Online Banking Application

Here is agenda: LINK:


Location:  Northrop Grumman IT, VITA Project
 11751 Meadowville Lane, 2S-J3
 Chester, VA 23836