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Big Data

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เรื่องน่ารู้เกี่ยวกับ Big Data ครับไปบรรยายาที่สถาบันจุฬาภรณ์ 23 เมษา 2556

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Big Data

  1. 1. Introduction to Big Data Dr. Putchong Uthayopas Department of Computer Engineering,Faculty of Engineering, Kasetsart University. pu@ku.ac.th
  2. 2. Agenda• Introduction and Motivation• Big Data Characteristics• Big Data Technology• Using Big Data• Trends
  3. 3. Introduction and Motivation
  4. 4. We are living in the world of Data Video Surveillance Social MediaMobile Sensors Gene Sequencing Smart Grids Geophysical Medical Imaging Exploration
  5. 5. Some Data sizes~40 109 Web pages at ~300 kilobytes each = 10 PetabytesYoutube 48 hours video uploaded per minute; in 2 months in 2010, uploaded more than total NBC ABC CBS ~2.5 petabytes per year uploaded?LHC 15 petabytes per yearRadiology 69 petabytes per yearSquare Kilometer Array Telescope will be 100terabits/secondEarth Observation becoming ~4 petabytes per yearEarthquake Science – few terabytes total todayPolarGrid – 100’s terabytes/yearExascale simulation data dumps – terabytes/second 5
  6. 6. http://www.touchagency.com/free-twitter-infographic/
  7. 7. Information as an Asset• Cloud will enable larger and larger data to be easily collected and used• People will deposit information into the cloud – Bank, personal ware house• New technology will emerge – Larger and scalable storage technology – Innovative and complex data analysis/visualization for multimedia data – Security technology to ensure privacy• Cloud will be mankind intelligent and memory!
  8. 8. “Data is the new oil.”Andreas Weigend, Stanford (ex Amazon)Data is more like soup – itsmessy and you don’t knowwhat’s in it….
  9. 9. The Coming of Data Deluge• In the past, most scientific disciplines could be described as small data, or evendata poor. Most experiments or studies had to contend with just a few hundred or a few thousand data points.• Now, thanks to massively complex new instruments and simulators, many disciplines are generating correspondingly massive data sets that are described as big data, or data rich. – Consider the Large Hadron Collider, which will eventually generate about 15 petabytes of data per year. A petabyte is about a million gigabytes, so that qualifies as a full-fledged data deluge. The Coming Data Deluge: As science becomes more data intensive, so does our language BY PAUL MCFEDRIES / IEEE SPECTURM FEBRUARY 2011
  10. 10. “Herculean” and“Heroic”Particlephysicsdata
  11. 11. Scale: an explosion of data http://www.phgfoundation.org/reports/10364/“A single sequencer can now generate in a day what it took 10years to collect for the Human Genome Project”
  12. 12. Creating a connectome• neuroscientists have set the goal of creating a connectome, a complete map of the brains neural circuitry. – an image of a cubic millimeter chunk of the brain would comprise about 1 petabyte of data (at a 5-nanometer resolution). – There are about a million cubic millimeters of neural matter to map, making a total of about a thousand exabytes (an exabyte is about a thousand petabytes) – qualifies as what Jim Gray once called an exaflood of data. The Coming Data Deluge: As science becomes more data intensive, so does our language BY PAUL MCFEDRIES / IEEE SPECTURM FEBRUARY 2011
  13. 13. The new model is for the data to be captured byinstruments or generated by simulations beforebeing processed by software and for the resultinginformation or knowledge to be stored in computers.Scientists only get to look at their data fairly late inthis pipeline. The techniques and technologies forsuch data-intensive science are so different that it isworth distinguishing data-intensive science fromcomputational science as a new, fourth paradigm forscientific exploration.—Jim Gray, computer scientist
  14. 14. • The White House today announced a $200 million big-data initiative to create tools to improve scientific research by making sense of the huge amounts of data now available..• Grants and research programs are geared at improving the core technologies around managing and processing big data sets, speeding up scientific research with big data, and encouraging universities to train more data scientists and engineers.• The emergent field of data science is changing the direction and speed of scientific research by letting people fine-tune their inquiries by tapping into giant data sets.• Medical research, for example, is moving from broad-based treatments to highly targeted pharmaceutical testing for a segment of the population or people with specific genetic markers.
  15. 15. So, what is big data?
  16. 16. Big Data“Big data is data that exceeds the processingcapacity of conventional database systems. Thedata is too big, moves too fast, or doesn’t fit thestrictures of your database architectures. To gainvalue from this data, you must choose analternative way to process it.” Reference: “What is big data? An introduction to the big data landscape.”, Edd Dumbill, http://radar.oreilly.com/2012/01/what-is-big- data.html
  17. 17. Amazon View of Big Data Big data refers to a collection of tools, techniques and technologies which make it easy to work with data at any scale. These distributed, scalable tools provide flexible programming models to navigate and explore data of any shape and size, from a variety of sources.
  18. 18. The Value of Big Data• Analytical use – Big data analytics can reveal insights hidden previously by data too costly to process. • peer influence among customers, revealed by analyzing shoppers’ transactions, social and geographical data. – Being able to process every item of data in reasonable time removes the troublesome need for sampling and promotes an investigative approach to data.• Enabling new products. – Facebook has been able to craft a highly personalized user experience and create a new kind of advertising business
  19. 19. Big Data Characteristics
  20. 20. 3 Characteristics of Big DataVolume • Volumes of data are larger than those conventional relational database infrastructures can cope with • Rate at which data flows in is much faster.Velocity • Mobile event and interaction by users. • Video, image , audio from users • the source data is diverse, and doesn’t fall into neatVariety relational structures eg. text from social networks, image data, a raw feed directly from a sensor source.
  21. 21. Big Data ChallengeVolume• How to process data so big that can not be move, or store.Velocity• A lot of data coming very fast so it can not be stored such as Web usage log , Internet, mobile messages. Stream processing is needed to filter unused data or extract some knowledge real-time.Variety• So many type of unstructured data format making conventional database useless.
  22. 22. Big Data Technology
  23. 23. From “Data Driven Discovery in Science:The Fourth Paradigm”, Alex Szalay, Johns Hopkins University
  24. 24. What is needed for big data• Your data• Storage infrastructure• Computing infrastructure• Middleware to handle BIG Data• Data Analysis – Statistical analysis – Data Mining• People
  25. 25. How to deal with big data• Integration of – Storage – Processing – Analysis Algorithm – Visualization Processing Massive Data Stream Processing Visualize Stream processing Storage Processing Analysis
  26. 26. How can we store and process massive data• Beyond capability of a single server• Basic Infrastructure – Cluster of servers – High speed interconnected – High speed storage cluster• Incoming data will be spread across the server farm• Processing is quickly distributed to the farm• Result is collected and send back
  27. 27. NoSQL (Not Only SQL)• Next Generation Databases mostly addressing some of the points: – being non-relational, distributed, open- source and horizontally scalable. – Used to handle a huge amount of data – The original intention has been modern web-scale databases. Reference: http://nosql-database.org/
  28. 28. MongoDB• MongoDB is a general purpose, open- source database.• MongoDB features: – Document data model with dynamic schemas – Full, flexible index support and rich queries – Auto-Sharding for horizontal scalability – Built-in replication for high availability – Text search – Advanced security – Aggregation Framework and MapReduce – Large media storage with GridFS
  29. 29. What is Hadoop?- Hadoop or Apache Hadoop- open-source software framework- supports data-intensive distributed applications.- develop by the Apache- derived from Googles MapReduce and Google File System (GFS) papers.- Implement with Java
  30. 30. Overview worker master
  31. 31. HDFS
  32. 32. Google Cloud Platform• App engines – mobile and web app• Cloud SQL – MySQL on the cloud• Cloud Storage – Data storage• Big Query – Data analysis• Google Compute Engine – Processing of large data
  33. 33. Amazon• Amazon EC2 – Computation Service using VM• Amazon DynamoDB – Large scalable NoSQL databased – Fully distributed shared nothing architecture• Amazon Elastic MapReduce (Amazon EMR) – Hadoop based analysis engine – Can be used to analyse data from DynamoDB
  34. 34. Issues• I/O capability of a single computer is limited , how to handle massive data• Big Data can not be moved – Careful planning must be done to handle big data – Processing capability must be there from the start
  35. 35. Using Big Data
  36. 36. WHAT FACEBOOK KNOWS Cameron Marlow calls himself Facebooks "in- house sociologist." He and his team canhttp://www.facebook.com/data analyze essentially all the information the site gathers.
  37. 37. Study of Human Society• Facebook, in collaboration with the University of Milan, conducted experiment that involved – the entire social network as of May 2011 – more than 10 percent of the worlds population.• Analyzing the 69 billion friend connections among those 721 million people showed that – four intermediary friends are usually enough to introduce anyone to a random stranger.
  38. 38. The links of Love• Often young women specify that they are “in a relationship” with their “best friend forever”. – Roughly 20% of all relationships for the 15-and-under crowd are between girls. – This number dips to 15% for 18- year-olds and is just 7% for 25-year- olds.• Anonymous US users who were over 18 at the start of the relationship – the average of the shortest number of steps to get from any one U.S. user to any other individual is 16.7. – This is much higher than the 4.74 steps you’d need to go from any Facebook user to another through friendship, as opposed to romantic, Graph shown the relationship of anonymous US users who were ties. over 18 at the start of the relationship. http://www.facebook.com/notes/facebook-data-team/the-links-of- love/10150572088343859
  39. 39. Why?• Facebook can improve users experience – make useful predictions about users behavior – make better guesses about which ads you might be more or less open to at any given time• Right before Valentines Day this year a blog post from the Data Science Team listed the songs most popular with people who had recently signaled on Facebook that they had entered or left a relationship
  40. 40. How facebook handle Big Data?• Facebook built its data storage system using open- source software called Hadoop. – Hadoop spreading them across many machines inside a data center. – Use Hive, open-source that acts as a translation service, making it possible to query vast Hadoop data stores using relatively simple code.• Much of Facebooks data resides in one Hadoop store more than 100 petabytes (a million gigabytes) in size, says Sameet Agarwal, a director of engineering at Facebook who works on data infrastructure, and the quantity is growing exponentially. "Over the last few years we have more than doubled in size every year,”
  41. 41. Google Flu• pattern emerges when all the flu- related search queries are added together.• We compared our query counts with traditional flu surveillance systems and found that many search queries tend to be popular exactly when flu season is happening.• By counting how often we see these search queries, we can estimate how much flu is circulating in different countries and regions around the world.http://www.google.org/flutrends/about/how.html
  42. 42. From “Data Driven Discovery in Science:The Fourth Paradigm”, Alex Szalay, Johns Hopkins University
  43. 43. From “Data Driven Discovery in Science:The Fourth Paradigm”, Alex Szalay, Johns Hopkins University
  44. 44. Preparing for BigData• Understanding and preparing your data – To effectively analyse and, more importantly, cross-analyse your data sets – this is often where the most insightful results come from – you need to have a rigorous knowledge of what data you have.• Getting staff up to scratch – Finding people with data analysis experience• Defining the business objectives – Once the end goal has been decided then a strategy can be created for implementing big data analytics to support the delivery of this goal• Sourcing the right suppliers and technology – But in terms of storage, hardware, and data warehousing, you will need to make a range of decisions to make sure you have all the capabilities and functionality required to meet your big data needs.http://www.thebigdatainsightgroup.com/site/article/preparing-big-data-revolution
  45. 45. Trends
  46. 46. Trends• A move toward large and scalable Virtual Infrastructure – Providing computing service – Providing basic storage service – Providing Scalable large database • NOSQL – Providing Analysis Service• All these services has to come together – Big data can not moved!
  47. 47. Issues• Security – Will you let an important data being accumulate outside your organization? • If it is not an important data, why analyze them ? – Who own the data? If you discontinue the service, is the data being destroy properly. – Protection in multi-tenant environment• Big data can not be moved easily – Processing have to be near. Just can not ship data around • So you finally have to select the same cloud for your processing. Is it available, easy, fast?• New learning, development cost – Need new programming, porting? – Tools is mature enough?
  48. 48. When to use Big data on the Cloud• When data is already on the cloud – Virtual organization – Cloud based SaaS Service• For startup – CAPEX to OPEX – No need to maintain large infra – Focus on scalability and pay as you go – Data is on the cloud anyway• For experimental project – Pilot for new services
  49. 49. Summary• Big data is coming. – Changing the way we do science – Big data are being accumulate anyway – Knowledge is power. • Better understand your customer so you can offer better service• Tools and Technology is available – Still being developed fast
  50. 50. Thank you

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