BigData & NoSQL ( PDFDrive.com ).pdf - BigData NoSQL DBMSs Tecnologie delle Basi di Dati M lucidi a cura del prof Torlone(univ Roma3 Big data Why

BigData & NoSQL ( PDFDrive.com ).pdf - BigData NoSQL...

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BigData & NoSQL DBMSs Tecnologie delle Basi di Dati M lucidi a cura del prof. Torlone (univ. Roma3)
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Big data? Why? Why not just data? Well, because they are: 1. Big “The greater the struggle, the more glorious the triumph.” (Butterfly Circus) 2. Necessary “It is a capital mistake to theorize before one has data.” (S. Holmes) 3. Fashionable “I always wanted to be fashionable.” (J. Malkovich) 4. Profitable “Data is a precious thing and will last longer than the systems themselves.” (T. Berners-Lee) 5. Exciting “The most exciting phrase to hear in science, is not ‘Eureka!’, but ‘That's funny’…” (I. Asimov) Tecnologie delle Basi di Dati M 2 BigData & NoSQL
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Goals Show state-of-the-art techniques for dealing with collections of unstructured data whose size exceeds the capacity of storage, management, and analysis typical for traditional (relational) database systems In particular: Requirements for modern applications Problems with big data Available hardware/software solutions BigData & NoSQL Tecnologie delle Basi di Dati M 3
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Roadmap Introduction Terminology, principal characteristics, and application samples Storing Big Data Hadoop & Map-reduce Cloud computing NoSQL DBMS …but there’s more! Big data computing (high-level tools like Pig/Hive) Big data analysis (technologies like Mahout/Open R) Applications (Semantic web/open data/social networks/genomic data) simply not enough time… BigData & NoSQL Tecnologie delle Basi di Dati M 4
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Big Data? Different definitions! “Big data exceeds the reach of commonly used hardware environments and software tools to capture, manage, and process it with in a tolerable elapsed time for its user population .” (Teradata Magazine article, 2011) “Big data refers to data sets whose size is beyond the ability of typical database software tools to capture, store, manage and analyze .” (The McKinsey Global Institute, 2012) “Big data is a term for data sets that are so large or complex that traditional data processing applications are inadequate .” (Wikipedia, 2016) BigData & NoSQL Tecnologie delle Basi di Dati M 5
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When data become “Big”? BigData & NoSQL Tecnologie delle Basi di Dati M 6 IOPS: Input/Output Operations Per Second Normal processing capability IOPS BIG DATA Data volume
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Some numbers How many data in the world? 800 Terabytes, 2000 160 Exabytes, 2006 (1EB = 10 18 B) 500 Exabytes, 2009 2.7 Zettabytes, 2012 (1ZB = 10 21 B) 35 Zettabytes by 2020 How much is a zettabyte? 1,000,000,000,000,000,000,000 bytes A stack of 1TB hard disks that is 25,400 km high How many data in a day? 7 TB, Twitter 10 TB, Facebook 90% of world's data: generated over last two years! BigData & NoSQL Tecnologie delle Basi di Dati M 7
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The three "V’s" of Big Data Not just a matter of volume… BigData & NoSQL Tecnologie delle Basi di Dati M 8
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What is more important?
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