[목차]

Relational, Analytical, Key-value, Column-oriented, Document, Graph

What is NoSQL?

• Non-SQL (No RDBMS)

• Not only SQL

• RDBMS가 아닌 모든 database

  • unstructured large-scale datasets

• Due to massively scalable Internet applications

  • Based on distributed and parallel computing

NoSQL and Big Data

• “Big data”?
  • over few terabytes ( 10^12 = 2^40 )
  • multiple storage units
• Challenges
  • manipulating large data involving distributed and parallel processes
  • semi-structured and unstructured
  • fault tolerance and backups

NoSQL 특징

• Scalable replication and distribution
  • potentially thousands of machines
  • potentially distributed around the world
  • queries need to be return answers quickly
• Mostly query, Few updates
  • Asynchronous Inserts & Updates
  • ACID transaction properties are not needed
• Schema-less
• Open-source development