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NoSQL looks to become the database of the Internet By Lawrence Latif Wed Dec 22 2010

NoSQL looks to become the database of the Internet By Lawrence Latif Wed Dec 22 2010. Nhu Nguyen and Phai Hoang CSCI 5708 – Architecture and Impl. Of DBMS Prof. Shashi Shekhar. Traditional DBMS vs NoSQL. Traditional DBMS Structured and organized data

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NoSQL looks to become the database of the Internet By Lawrence Latif Wed Dec 22 2010

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  1. NoSQL looks to become the database of the InternetBy Lawrence LatifWed Dec 22 2010 Nhu Nguyen and Phai Hoang CSCI 5708 – Architecture and Impl. Of DBMS Prof. Shashi Shekhar

  2. Traditional DBMS vs NoSQL • Traditional DBMS • Structured and organized data • Data and its relationships are stored in separate tables. • NoSQL • Stands for Not Only SQL ( ≠ Don’t use SQL Language) • Flexible schema • Key-Value pair storage • Eventual consistency rather ACID property • Unstructured, messy and unpredictable data • Prioritizes high performance, high availability and scalability

  3. History of NoSQL • 1998: • Carlo Strozzi used the term NoSQL to name his lightweight, open-source relational database. • Early 2000s: • NoSQL fell out of favour in the early 2000s. • Hosting providers such as Dedipower promoted it as an alternative to traditional db. • Nowadays • Web giants such as Amazon, Google, Twitter, Ebay and Facebook already use NoSQL implementation.s to power customer facing parts of their businesses.

  4. What kind of NoSQL? • Key/Value or ‘the big hash table’. • Using Hash table • Data model: (key, value) pairs • Operations: Insert(key,value), Fetch(key), Update(key), Delete(key) • Ex: Amazon Dynamo, LinkedIn Voldemort • Column Family Store • Still keys but point to multiple columns • Ex: Cassandra, HBase • Document database • Ex: CouchDB, MongoDB • Graph Database • Ex: Neo4J, InfoGrid, Infinite Graph

  5. What kind of NoSQL? • Object Databases • Ex: Versant • RDF Databases • BigTable, Apache Hbase

  6. Limitations of NoSQL relative to RDBMS ACID transactions (strong consistency) May not support join, range query Facebook and Twitter were built on mySQL

  7. Example: Apache Cassandra • Free, open source, distributed storage • Exists within the Apache family • Originally developed at Facebook • Column-oriented data model • Uses Apache Thrift as it’s API • keyspace.getSlice(key, “column_family”, "column") • keyspace.getSlice(123, new ColumnParent(“rockets”), getSlicePredicate());

  8. Hashing in Cassandra • Partition using consistent hashing • Keys hash to a point on a fixed circular • space • Ring is partitioned into a set of ordered slots and • servers and keys hashed over these slots • Nodes take positions on the circle. • A, B, and D exists. • B responsible for AB range. • D responsible for BD range. • A responsible for DA range. • C joins. • B, D split ranges. • C gets BC from D.

  9. References NoSQL looks to become the database of the Internet , Inquirer, Dec. 2010 http://www.theinquirer.net/inquirer/feature/1933560/nosql-looks-database-internet NoSql, Wikipedia

  10. Thank you

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