Machine Learning Capacity and Performance Analysis and R

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1 Machine Learning and R May 3, 11

2 P95 CPU AVG CPU Introduction Introduction Machine Learning Brief Introduction to Machine Learning and Data Mining What, Why and How How can this be applied to Capacity and Performance Analysis Data driven Patterns Example: Utilization Profiling in R Data Transformation Model Construction and Test Model Deployment Day of the Month Day of the Month Day of the Month CPU July Hours June Hours May Hours Day of the Month Day of the Month Day of the Month rdcuxsrv277.insidelive.net Memory July Hours June Hours May Make: UNIX Hours % CPU Utilization Forecast P95: F30=85.3 F60=87.8 F90=90.3 F180=97.7 AVG: F30= 57.3 F60= 58.8 F90= 60.2 F180= 64.5 rdcuxsrv277.insidelive.net Days Configuration Environment: QA OS: SunOS OS Version: G Number of CPU: 16 Total Memory: Machine Learning and R

3 Machine Learning: Definition There are Many: Here are a couple Definition: Tom M. Mitchell provided a widely quoted definition: A computer program is said to learn from experience E with respect to some class of tasks T and performance measure P, if its performance at tasks in T, as measured by P, improves with experience E.[1] Definition: The field of machine learning studies the design of computer programs able to induce patterns, regularities, or rules from past experiences. Learner (a computer program) processes data representing past experiences and tries to either develop an appropriate response to future data, or describe in some meaningful way the data seen. [2] Machine Learning and R

4 Example: Handwritten Digits Elements of Machine Learning: Task T recognizing and classifying handwritten words within images Performance P percent of words correctly classified Experience E a database of handwritten words with given classifications Machine Learning and R

5 Methods Introduction Machine Learning Supervised learning[4]: Use a labeled (known) set of data to build models to perform classification or regression Use the model on new data to make predictions or describe the data Supervised algorithms: Linear Regression Trees Neural Networks Support Vector Machines Machine Learning and R

6 Methods Introduction Machine Learning Unsupervised learning[4]: Find hidden structure in unlabeled (unknown) data Unsupervised algorithms: Kmeans K Nearest Neighbor Hierarchical Clustering Association Rules Principal Components Machine Learning and R

7 Machine Learning is a Process Like application development CRISP-DM, for example[3]: Business Understanding Data Understanding Data Preparation Modeling Evaluation Deployment REPEAT AS NEEDED Machine Learning and R

8 Applications Introduction Machine Learning Some notable applications: Spam Filtering Yahoo Fraud / Anomaly Detection - Credit Card Stock Predications / Trading Models Recommendation - Netflix Social Network Analysis Facebook Internet Search Google Machine Learning and R

9 And you can make money! Data Mining Competitions: Netflix $1M Heritage Health Prize - $3M Kaggle Machine Learning and R

10 Capacity Planning and Performance Analysis: A simplified view of capacity planning: Hourly and Daily, Monday thru Friday stats Peak and Average Daily Utilization Simple linear regression on peak and average utilization Extrapolate days into the future. Machine Learning and R

11 Capacity Planning Simplified View: rdcuxsrv277.insidelive.net CPU July Memory July Forecast P95: F30=85.3 F60=87.8 F90=90.3 F180=97.7 AVG: F30= 57.3 F60= 58.8 F90= 60.2 F180= 64.5 Day of the Month Day of the Month P95 CPU AVG CPU rdcuxsrv277.insidelive.net Hours June Hours June % CPU Utilization Day of the Month Day of the Month Hours May Day of the Month Day of the Month Hours May Days Configuration Environment: QA Make: UNIX OS: SunOS OS Version: G Number of CPU: 16 Total Memory: Hours Hours * One page Server Utilization, Forecast, and Configuration developed using R Machine Learning and R

12 Capacity Planning Simplified View: Put all forecasts into a spreadsheet and sort by 30, 60, 90, or 180 forecast to find top Utilized servers Machine Learning and R

13 Capacity Planning Simplified View: Works well for stable business applications and environments. With servers capacity planning for critical servers is straight forward. Machine Learning and R

14 Capacity Planning Real world With 3k-4k-5k-+10k servers capacity planning is very difficult. Why? Many different environments, Production, Test, BCP, QA Many different applications: database, web server, Quant, Hadoop, etc. Many different hardware platforms: Unix, Linux, Windows, VMWare, etc. Things are not stable and well formed different applications have different utilization profiles, for different reasons. Exceptions occur Machine Learning and R

15 How can Machine Learning help? Lots and lots of data System have many different components and each component has its own function and collection of metrics that determine performance No problem is in isolation, there are many different sets of data that need to be correlated Many different relationships server, storage, database, application... Lots of historical data (Capacity Database?) Many repeating and familiar patterns Machine Learning and R

16 How can Machine Learning help? Elements of Machine Learning: Task T Classify resource utilization/performance Performance P Filtered list of key utilization classes Enhanced Monitoring Smart Alerting Experience E Historical data from a capacity database Machine Learning and R

17 Utilization Patterns Resource Utilization have patterns They are visual clues as to performance and future utilization These patterns can be grouped: Normal A flat utilization, stable environment, could be either consistently high/middle/low in its utilization. Cyclic Highly variable workload, maybe some consistency like month-end or quant load. Trend Increasing Organic growth in the utilization. Trend Decreasing Reduced workload, application retirement. Shift Upward Sharp increase in processing, could be related to broken processes, cluster failover to stand-by server, and/or new application deployment. Shift Downward Sharp decrease in processing, could be related to fixing processes, fail-back, or application retirement. Machine Learning and R

18 Utilization Patterns Machine Learning and R

19 What is R? Introduction Machine Learning Open source statistical programming language Great visualization packages Many different modeling packages Many different machine learning packages Almost a complete solution for building machine learning tools scaling is an issue, i.e. the problem has to fit in memory. Machine Learning and R

20 Support Vector Machine Machine Learning and R

21 Data Considerations Performance and Utilization data is time series DateTime S e r v e r AverageCPU w e b s e r v e r w e b s e r v e r w e b s e r v e r w e b s e r v e r w e b s e r v e r 94 ML data format is a matrix with the general form Y, X1, X2,...Xn Need to convert time series to matrix Y X1 X2 X3 X4 X5 w e b s e r v e r Data needs to be consistent and well formed, no missing or bad data Machine Learning and R

22 SVM Demonstration Data is generated, prototypes.r helperfunctions.r createdata confusionm printmissclassified demo 1.R Builds an initial SVM model, tunes the model and classifies new data with the model demo 2.R Improves the accuracy of the initial model Machine Learning and R

23 Generated Data Introduction Machine Learning Datasets contain 100 of each type of pattern, i.e. 600 servers There are 130 X data points/features representing 180 days, Monday thru Friday Randomly generated... Machine Learning and R

24 First Predictive Model Create the first model ### OUT OF THE BOX ## GET DATA Ynew < dget ( Y 7 ) data < c r e a t e D a t a ( Ynew ) ## SPLIT TO x and Y x < s u b s e t ( data, s e l e c t = c l a s s ) y < data $ c l a s s ## BUILD MODEL model < svm ( c l a s s., data = data ) summary ( model ) C a l l : svm ( formula = c l a s s., data = data ) Parameters : SVM Type : C c l a s s i f i c a t i o n SVM K e r n e l : r a d i a l cost : 1 gamma : Number of Support Vectors : 545 ( ) Number of Classes : 6 Levels : C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Machine Learning and R

25 First Predictive Model Check the models accuracy > ## PREDICTIONS pred < p r e d i c t ( model, x ) # CHECK ACCURACY: confusionm ( pred, y ) P r e d i c t e d Values : Yp C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Y values : Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Confusion Matrix : Yp Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp C y c l i c Normal ShiftDown S h i f t U p TrendDown TrendUp Accuracy = [ 1 ] Machine Learning and R

26 First Predictive Model Model Tuning: > o b j < tune. svm ( c l a s s., data = data, gamma = 2ˆ( 1:1), c o s t = 2 ˆ ( 2 : 4 ) ) > summary ( o b j ) Parameter t u n i n g o f s v m : s a m p l i n g method : 10 f o l d c r o s s v a l i d a t i o n best parameters : gamma c o s t best performance : D e t a i l e d p e r f o r m a n c e r e s u l t s : gamma c o s t e r r o r d i s p e r s i o n Machine Learning and R

27 First Predictive Model Re-run the training data with tuned parameters > ### AFTER TUNING ## NEW MODEL WITH COST AND GAMMA model < svm ( c l a s s., data = data, cost =2.25, gamma=.01) ## RE DO THE PREDICTION pred < p r e d i c t ( model, x ) # CHECK ACCURACY confusionm ( pred, y ) P r e d i c t e d Values : Yp C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Y values : Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Confusion Matrix : Yp Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp C y c l i c Normal ShiftDown S h i f t U p TrendDown TrendUp Accuracy = [ 1 ] Machine Learning and R

28 First Predictive Model Missclassification Analysis > p r i n t M i s s C l a s s i f i e d ( pred, y ) P r e d i c t e d A c t u a l o b s e r v a t i o n 1 Normal C y c l i c Normal C y c l i c TrendUp S h i f t U p TrendUp S h i f t U p TrendDown ShiftDown TrendDown ShiftDown 586 > p l o t ( t ( data [ 1 5 6, 2 : ] ), t y p e= l, main= Debug, y l a b= %u t i l, y l i m=c ( 0, ) ) Machine Learning and R

29 First Predictive Model Use the model to classify new data ### NEW DATA ## READ IN DATA THAT MODEL HAS NOT SEEN Ynew < dget ( Y 6 ) data < c r e a t e D a t a ( Ynew ) ## SPLIT TO X and Y x < s u b s e t ( data, s e l e c t = c l a s s ) y < data $ c l a s s ## PREDICT CLASS USING PREVIOUSLY CREATED MODEL pred < p r e d i c t ( model, x ) # CHECK ACCURACY confusionm ( pred, y ) P r e d i c t e d Values : Yp C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Y values : Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Confusion Matrix : Yp Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp C y c l i c Normal ShiftDown S h i f t U p TrendDown TrendUp Accuracy = [ 1 ] Machine Learning and R

30 How Can we improve on these results? More tuning of the cost and gamma parameters? Is the data representative of the real world? More training data in the model? Less training data in the model? Model overfitting? Are we using the right algorithm, the right way? Machine Learning and R

31 Improved Predictive Model Add more data to the Model Build > ### OUT OF THE BOX ## ADD MORE DATA TO THE MODEL BUILD Ynew < dget ( Y 7 ) d < c r e a t e D a t a ( Ynew ) data < d Ynew < dget ( Y 5 ) d < c r e a t e D a t a ( Ynew ) data < r b i n d ( data, d ) Ynew < dget ( Y 4 ) d < c r e a t e D a t a ( Ynew ) data < r b i n d ( data, d ) Ynew < dget ( Y 3 ) d < c r e a t e D a t a ( Ynew ) data < r b i n d ( data, d ) Ynew < dget ( Y 2 ) d < c r e a t e D a t a ( Ynew ) data < r b i n d ( data, d ) Ynew < dget ( Y 1 ) d < c r e a t e D a t a ( Ynew ) data < r b i n d ( data, d ) ## SPLIT TO x and Y x < s u b s e t ( data, s e l e c t = c l a s s ) y < data $ c l a s s Machine Learning and R

32 Improved Predictive Model Add more data to the Model Build, cont. > ## BUILD MODEL model < svm ( c l a s s., data = data ) summary ( model ) C a l l : svm ( formula = c l a s s., data = data ) Parameters : SVM Type : C c l a s s i f i c a t i o n SVM K e r n e l : r a d i a l cost : 1 gamma : Number of Support Vectors : 2475 ( ) Number of Classes : 6 Levels : C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Machine Learning and R

33 Improved Predictive Model Add more data to the Model Build, cont. > ## PREDICTIONS pred < p r e d i c t ( model, x ) # CHECK ACCURACY: confusionm ( pred, y ) P r e d i c t e d Values : Yp C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Y values : Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Confusion Matrix : Yp Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp C y c l i c Normal ShiftDown S h i f t U p TrendDown TrendUp Accuracy = [ 1 ] Machine Learning and R

34 Improved Predictive Model Tune the new model > ### AFTER TUNING ## NEW MODEL WITH COST AND GAMMA model < svm ( c l a s s., data = data, cost =2.25, gamma=.01) ## RE DO THE PREDICTION pred < p r e d i c t ( model, x ) # CHECK ACCURACY confusionm ( pred, y ) P r e d i c t e d Values : Yp C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Y values : Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Confusion Matrix : Yp Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp C y c l i c Normal ShiftDown S h i f t U p TrendDown TrendUp Accuracy = [ 1 ] Machine Learning and R

35 Improved Predictive Model Use the new model to classify new data > ### NEW DATA ## READ IN DATA THAT MODEL HAS NOT SEEN Ynew < dget ( Y 6 ) data < c r e a t e D a t a ( Ynew ) ## SPLIT TO X and Y x < s u b s e t ( data, s e l e c t = c l a s s ) y < data $ c l a s s ## PREDICT CLASS USING PREVIOUSLY CREATED MODEL pred < p r e d i c t ( model, x ) # CHECK ACCURACY confusionm ( pred, y ) P r e d i c t e d Values : Yp C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Y values : Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp Confusion Matrix : Yp Y C y c l i c Normal ShiftDown ShiftUp TrendDown TrendUp C y c l i c Normal ShiftDown S h i f t U p TrendDown TrendUp Accuracy = [ 1 ] Machine Learning and R

36 Model Deployment Considerations Need to create the training data from real data; lots of labeling required. Patterns and labeling need to be consistent with objectives. Training data and New data need to be well formed, and consistent. Need to consider rare observations: anomaly detection. Experimentation is required; no one best solution. There are always trade-offs. Continually monitor model performance: is the real world drifting? Need to have model measurement and validation processes. Change control of a new model, what, why and how. Models are guides, not the answer. Machine Learning and R

37 Thank You! Introduction Machine Learning Phone: Example code and slides available:?? Machine Learning and R

38 References: Introduction Machine Learning Wikipedia Vucetic, Slobodan http: //www.ist.temple.edu/~vucetic/cis526fall03/lecture1.pdf CRoss Industry Standard Process for Data Mining Trevor Hastie, Robert Tibshirani, Jerome Friedman, The Elements of Statistical Learning: Data Mining, Inference, and Prediction. Machine Learning and R

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