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Cetas Presentation on Real-time Recommendation Systems
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Cetas Presentation on Real-time Recommendation Systems
1.
Real-Time Recommender Systems Bay
Area Search Meetup at eBay April 25, 2012 Balu Rajagopal
2.
Goal of Recommenders
INSTANT INTELLIGENCE 1. Increase number of items sold 2. Cross-Sell, Up-Sell diverse items 3. Increase Customer Satisfaction 4. Build Loyalty 5. Improve User Experience Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 2
3.
Recommendations
INSTANT INTELLIGENCE USERS Search Recommendations Products Web sites Social networks ITEMS Blogs News …. Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 3
4.
Two Challenges
INSTANT INTELLIGENCE Make a Personalized Recommendation – Multi-Dimensional Data – Streams: Social, Activity, Apps, Tweets, Actions, … – Demographic – Temporal, Spatial Do it in real-time – Query to Analysis to Visualization – User Experience (UX) – System Constraints – Network, Capacity, SLA Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 4
5.
Problem Space
INSTANT INTELLIGENCE Cetas Instant Intelligence Framework Secs or Less Large RESPONSE TIME TO USER DATA DIMENSIONS Minutes Medium Hours Small Gigabytes Terabytes Petabytes ANALYSIS VOLUME Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 5
6.
Real-time Recommender System
INSTANT INTELLIGENCE Inputs Terabytes of Multi-Dimensional data Preprocessing Reduction @ Scale @ Speed Analysis Classifying, Clustering Output Prediction, Recommendation Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 6
7.
Real-time Recommender System
INSTANT INTELLIGENCE • Spatial Inputs • Temporal • Demographic • Personal • Psychographic • Behavioral Preprocessing Reduction Analysis Classifying, Clustering Output Predictions, Recommendations, Patterns Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 7
8.
Real-time Recommender System
INSTANT INTELLIGENCE • Spatial Inputs • Temporal • Demographic • Personal • Psychographic • Behavioral • Distance Measures Preprocessing • Sampling • PCA • Dimensionality Reduction • SVD Analysis Classifying, Clustering Output Predictions, Recommendations, Patterns Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 8
9.
Real-time Recommender System
INSTANT INTELLIGENCE • Spatial Inputs • Temporal • Demographic • Personal • Psychographic • Behavioral • Distance Measures Preprocessing • Sampling • PCA • Dimensionality Reduction • SVD • Predictors • Classification Analysis • Descriptors • Association • Clustering Output Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 9
10.
Real-time Recommender System
INSTANT INTELLIGENCE • Spatial Inputs • Temporal • Demographic • Personal • Psychographic • Behavioral • Distance Measures Preprocessing • Sampling • PCA • Dimensionality Reduction • SVD • Predictors • Classification Analysis • Descriptors • Association • Clustering • Predictions Output • Recommendations • Patterns Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 10
11.
Big Data Analytics
– eCommerce INSTANT INTELLIGENCE Input data Clustering Closed-loop Action User transactions live stream Product placement decision Demographics data stream Category, sub- category sorting Online app events stream New product Ad placement offering stream Other streams … Other actions … Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 11
12.
Real-time Stream Processing
INSTANT INTELLIGENCE Billions of Events I n d e x CEP RAM Cache Joins RAM Disk Aggregates HBase HDFS Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 12
13.
Wrap-up
INSTANT INTELLIGENCE Personalized Recommendation Engine – Non-trivial – Focus on Specific Use Case Real-time – Distributed Indexing – Pre-computation – Compact store (in memory, on disk) – Parallelization Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 13
14.
References
INSTANT INTELLIGENCE Mining Massive Datasets – Free eBook – Anand Rajaraman, Jeff Ullman – cs246.stanford.edu Introduction to Data Mining – Tan, Steinback, Kumar Introduction to Recommender Systems Handbook – Ricci, Rokach, Shapira Cetas Software Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 14
15.
INSTANT INTELLIGENCE Cetas Software
Inc. – Copyright © 2012– CONFIDENTIAL – DO NOT DISTRIBUTE 15