Introducing CouchDB
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Introducing CouchDB

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An introduction to CouchDB for the first Jeddah Geeks meetup on 13/Nov/2009

An introduction to CouchDB for the first Jeddah Geeks meetup on 13/Nov/2009

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Introducing CouchDB Introducing CouchDB Presentation Transcript

  • Introducing CouchDB Tuesday November 11, 2009 Hatem Ben Yacoub
  • Who am I ?
    • Hatem Ben Yacoub
    • IT Consultant
    • Senior Systems Architect
    • PHP Expert
    • e-Government Specialist
    • Energy Engineer
    • Open Source Evangelist
    • http://phpmagazine.net
    • [email_address] / @hatem / http://hatem.tel
  • How to build faster, bigger, reliable websites...
  • Scalability
  • Scalability ~== Database optimization
  • RDBMS … old fashion
  • … new fashion ??
  • NoSQL “ Not Only SQL”
  • Scaling writes & Scaling reads
  • NoSQL Non-Distributed databases (Redis, MongoDB, CouchDB , Neo4j, Tokyo cabinet ...) Distributed Databases (Cassandra, Hbase, Riak, Scalaris...)
  •  
  • CouchDB is NOT
    • A relational database.
    • A replacement for relational databases.
    • An object-oriented database.
  • CouchDB is
    • OpenSource Database
    • RESTful API
    • Schema-less document store (document in JSON format)
    • Multi-Version-Concurrency-Control model
    • User-defined query structured as map/reduce
    • Incremental Index Update mechanism
    • Multi-Master Replication model
    • Written in Erlang
  • Let's give it a try Ubuntu 9.10 already uses couchdb (all POSIX systems supported) Install the database server : $sudo apt-get install couchdb
  • Test installation
  • CouchDB port 5984
  • CouchDB Management interface (Futon)
  • Create database test
  • Firebug
  • Creating a document with jQuery // server respond with JSON also : // {"ok":true, "id":"323409622afb6477e7108684785256b8", "rev":"1-3182c819b0f98858c54ad920d6c44498"} // including the document id and revision, and a confirmation variable ok=true
  • How to request this document ? // response is also in JSON : // {"_id":"323409622afb6477e7108684785256b8", "_rev":"1-3182c819b0f98858c54ad920d6c44498", "Name":"Makkah", "Zip":21955}
  • What about updating ? // notice in the response we have revision changed to 2 // {"ok":true, "id":"323409622afb6477e7108684785256b8", "rev":"2-03779debc847f783493a69e61bd98560"}
  • What about creating a view ? // Server respond with {"ok":true, "id":"_design/render", "rev":"1-f95a9b997f1081043fda1a34be76c47e" } http://127.0.0.1:5984/test/_design/render/_show/code/480f17c996bcbd174ac64b976de47f79
  • Easy ?!
  • Why CouchDB
    • Easy to use data storage (NoSQL)
    • Easy to integrate with web applications : JavaScript, JSON
    • Scalability for large web applications : Incremental Replication, bi-directional conflict detection and management
    • Query-able and index-able
    • Offline by default
  • Who's using CouchDB ?
  • Relax
  •  
  • Ubuntu One Ubuntu : 10 million desktops worldwide
  •  
  • Lounge proxy-based partitioning/clustering framework
  • Mozilla Raindrop New messaging platform built on top of CouchDB
  • Thank you
  • Read more ...
    • http://couchdb.org
    • http://planet.couchdb.org
    • http://horicky.blogspot.com/2008/10/couchdb-implementation.html
    • http://jan.prima.de
    • http://damienkatz.net/
    • http://jchrisa.net
  • Questions ?