# Tutorial: Big Data Algorithms and Applications Under Hadoop KUNPENG ZHANG SIDDHARTHA BHATTACHARYYA

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1 Tutorial: Big Data Algorithms and Applications Under Hadoop KUNPENG ZHANG SIDDHARTHA BHATTACHARYYA August 7, 2014

2 Schedule I. Introduction to big data (8:00 8:30) II. Hadoop and MapReduce (8:30 9:45) III. Coffee break (9:45 10:00) IV. Distributed algorithms and applications (10:00 11:40) V. Conclusion (11:40 12:00)

3 I. Introduction to big data

4 I. Introduction to big data What is big data Why big data matters to you 10 use cases of big data analytics Techniques for analyzing big data

5 What is big data Big data is a blanket term for any types of data sets so large and complex that it becomes difficult to process using onhand data management tools or traditional data processing applications. [From Wikipedia]

6 5 Vs of big data To get better understanding of what big data is, it is often described using 5 Vs. Variety Veracity Volume Velocity Value

7 We see increasing volume of data, that grow at exponential rates Volume refers to the vast amount of data generated every second. We are not talking about Terabytes but Zettabytes or Brontobytes. If we take all the data generated in the world between the beginning of time and 2008, the same amount of data will soon be generated every minute. This makes most data sets too large to store and analyze using traditional database technology. New big data tools use distributed systems so we can store and analyze data across databases that are dotted around everywhere in the world. Variety Volume Veracity Velocity Value

8 We see increasing velocity (or speed) at which data changes, travels, or increases Velocity refers to the speed at which new data is generated and the speed at which data moves around. Just think of social media messages going viral in seconds. Technology now allows us to analyze the data while it is being generated (sometimes referred to as it in-memory analytics), without ever putting into databases. Variety Volume Veracity Velocity Value

9 We see increasing variety of data types Variety refers to the different types of data we can now use. In the past we only focused on structured data that neatly fitted into tables or relational databases, such as financial data. In fact, 80% of world s data is unstructured (text, images, video, voice, etc.). With big data technology we can now analyze and bring together data of different types such as messages, social media conversations, photos, sensor data, video or voice recordings. Variety Volume Veracity Velocity Value

10 We see increasing veracity (or accuracy) of data Veracity refers to messiness or trustworthiness of data. With many forms of big data quality and accuracy are less controllable (just think Twitter posts with hash tags, abbreviations, typos and colloquial speech as well as the reliability and accuracy of content) but technology now allows us to work with this type of data. Variety Volume Veracity Velocity Value

11 Value The most important V of all! There is another V to take into account when looking at big data: Value. Having access to big data is no good unless we can turn it into value. Companies are starting to generate amazing value from their big data. Variety Volume Veracity Velocity Value

12 Introduction to big data What is big data Why big data matters to you 10 use cases of big data analytics Techniques for analyzing big data

13 Big data is more prevalent than you think

14 Big data formats

15 Competitive advantages gained through big data

16 Big data job postings

17 Introduction to big data What is big data Why big data matters to you 10 use cases of big data analytics Techniques for analyzing big data

18 1. Understanding and targeting customers Big data is used to better understand customers and their behaviors and preferences. Target: very accurately predict when one of their customers will expect a baby; Wal-Mart can predict what products will sell; Car insurance companies understand how well their customers actually drive; Obama use big data analytics to win 2012 presidential election campaign. Social media data Browser logs Predic0ve models Sensor data Text analy0cs

19 2. Understanding and optimizing business processes Retailers are able to optimize their stock based on predictions generated from social media data, web search trends, and weather forecasts; Geographic positioning and radio frequency identification sensors are used to track goods or delivery vehicles and optimize routes by integrating live traffic data, etc.

20 3. Personal quantification and performance optimization The Jawbone armband collects data on our calorie consumption, activity levels, and our sleep patterns and analyze such volumes of data to bring entirely new insights that it can feed back to individual users; Most online dating sites apply big data tools and algorithms to find us the most appropriate matches.

21 4. Improving healthcare and public health Big data techniques are already being used to monitor babies in a specialist premature and sick baby unit; Big data analytics allow us to monitor and predict the developments of epidemics and disease outbreaks; By recording and analyzing every heart beat and breathing pattern of every baby, infections can be predicted 24 hours before any physical symptoms appear.

22 5. Improving sports performance Use video analytics to track the performance of every player; Use sensor technology in sports equipment to allow us to get feedback on games; Use smart technology to track athletes outside of the sporting environment: nutrition, sleep, and social media conversation.

23 6. Improving science and research CERN, the Swiss nuclear physics lab with its Large Hadron Collider, the world s largest and most powerful particle accelerator is using thousands of computers distributed across 150 data centers worldwide to unlock the secrets of our universe by analyzing its 30 petabytes of data.

24 7. Optimizing machine and device performance Google self-driving car: the Toyota Prius is fitted with cameras, GPS, powerful computers and sensors to safely drive without the intervention of human beings; Big data tools are also used to optimize energy grids using data from smart meters.

25 8. Improving security and law enforcement National Security Agency (NSA) in the U.S. uses big data analytics to foil terrorist plots (and maybe spy on us); Police forces use big data tools to catch criminals and even predict criminal activity; Credit card companies use big data to detect fraudulent transactions.

26 9. Improving and optimizing cities and countries Smart cities optimize traffic flows based on real time traffic information as well as social media and weather data.

27 10. Financial trading The majority of equity trading now takes place via data algorithms that increasingly take into account signals from social media networks and news websites to make, buy and sell decisions in split seconds (High-Frequency Trading, HFT).

28 Introduction to big data What is big data Why big data matters to you 10 use cases of big data analytics Techniques for analyzing big data

29 Techniques and their applications Association rule mining: market basket analysis Classification: prediction of customer buying decisions Cluster analysis: segmenting consumers into groups Crowdsourcing: collecting data from community Data fusion and data integration: social media data combined with real-time sales data to determine what effect a marketing campaign is having on customer sentiment and purchasing behavior

30 Techniques and their applications Ensemble learning Genetic algorithms: job scheduling in manufacturing and optimizing the performance of an investment portfolio Neural networks: identify fraudulent insurance claims Natural language processing: sentiment analysis Network analysis: identifying key opinion leaders to target for marketing and identifying bottlenecks in enterprise information flows

31 Techniques and their applications Regression: forecasting sales volumes based on various market and economic variables Time series analysis: hourly value of a stock market index or the number of patients diagnosed with a given condition every day Visualization: understand and improve results of big data analyses

32 Big data tools Big Table by Google MapReduce by Google Cassandra by Apache Dynamo by Amazon Hbase by Apache Hadoop by Apache

33 Visualization tools D3.js: Tag cloud: Clustergram: History flow: R: Network visualization (Gephi):

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