How to get started with NoSQL?

Since 2009 NoSQL databases becomes more and more popular. But why?

  • No usage of SQL, that means
    • Less complexity
    • Better portability
    • Boundlessness
    • User-friendliness
  • Most databases are Open-Source
  • Performance
  • Scalability

Famous companies like Twitter, Facebook and Amazon are using NoSQL databases.
What sorts of NoSQL databases are used today?

  • Key-Value stores
    • Easy to implement
    • Only key-value-pairs can be stored
    • Difficult to build complex data structures
  • Column stores
    • Columns don't have to be defined in advance.
    • A row can have different numbers of cells
  • Document stores
    • Like key-value stores, but allows nested values
  • Graph databases
    • Objects and relationships are modelled and persisted as nodes and edges of a graph

What NoSQL databases are present today?

  • Cassandra
    • Data Model: Columnfamily
    • Query API: Thrift
  • Couchbase
    • Data Model: Document & Key/value
    • Query API: map/reduce views
  • CouchDB
    • Data Model: Document
    • Query API: map/reduce views
  • HBase
    • Data Model: Columnfamily
    • Query API: Thrift, REST
  • MongoDB
    • Data Model: Document
    • Query API: Cursor
  • Neo4j
    • Data Model: Graph
    • Query API: Graph
  • Redis
    • Data Model: Collection
    • Query API: Collection
  • Riak
    • Data Model: Document
    • Query API: Nested hashes
  • Scalaris
    • Data Model: Key/value
    • Query API: get/put
  • Tokyo Cabinet
    • Data Model: Key/value
    • Query API: get/put
  • Voldemort
    • Data Model: Key/value
    • Query API: get/put

.NET APIs

Cassandra

Couchbase

CouchDB

MongoDB

Tokyo Cabinet

Further Reading

A good introduction to the concepts of NoSQL is the paper "NoSQL Databases" from Christof Strauch.
Also read the "Scalable SQL and NoSQL Data Stores" from Rick Cattell.


See Also


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