1. NoSQL
Re-thinK the world

2. NoSQL
Not Only SQL
next-generation databases
modern web-scale databases

3. RDBMs Problem
Design for ACID
Hard to scale
Availability?
Flexibility

4. Possible Solutions
Oracle/Sybase
Mysql/PostgreSQL Cluster/Replica
Super-powered Computer

6. Unnecessarily Complex but just better

7. Characteristics
Non-Relational
Distributed
Horizontal Scalability
Schema-less/Schema-free
Eventual Consistency

8. Category
Key-Value stores
Document stores
Column-oriented stores
Graph Databases

9. Key-Value Store
hash
Memcached
Dynamo
Redis
Riak
Tokyo Cabinet

10. Document Stores
semi-structure
IBM Lotus
MongoDB
CouchDB

11. Column-Oriented Stores
semi-structure
BigTable (inspiration source)
HBase
Cassandra
Hypertable

12. Graph Database
InfoGrid
Neo4j

13. Ruby/Rails Integration
NoSQL Database Ruby Rails
Redis redis-rb ohm
Riak riak
Tokyo Cabinet tokyo-cabinet
MongoDB mongo-ruby-driver MongoMapper
CouchDB CouchRest CouchRest-Rails
HBase hbase-ruby rhino
Cassandra cassandra cassandra_object
Neo4j neo4j (jruby)

14. Brewer’s CAP Theorem
Consistency Availability
Partitions Tolerance
You can have at most two of the properties for any
shared-data system

15. Decision?
Consistency Availability
? ?
Partitions Tolerance

16. BigTable Cassandra
HBase SimpleDB
Consistency Availability
MongoDB CouchDB
Redis Riak
Partitions Tolerance

17. Activities
Google
Facebook
Yahoo
Twitter
GitHub

18. Services
Google App Engine
Amazon SimpleDB
MongoHQ
CouchIO
VMWare?

19. Example
http://gemsday.org by Intridea, Inc
Powered by MongoDB, Sinatra, TweetStream

20. Thanks for your patience!
Email: yedingding@gmail.com
Twitter: @yedingding
GitHub: http://github.com/sishen