NoSQL Databases

NoSQL

Not Only SQL

Meeting big data requirements

Non-Relational

NoSQL Databases

Non-relational databases used for big data

Flexible Schema

DB must easily accommodate complex and variable data structures

Relaxed ACID Properties

ACID requirements are relaxed in many big data apps

Key-Value DBMS

Data represented as a single key and an associated value, and the key is used to access the value

Extensible Markup Language (XML)

Markup language that defines a set of rules encoding documents in a format that can be read from both humans and machines

Document DBMS

Stored in XML or JSON (JavaScript Object Notation)

Supports JSON/XML

JSON is used for web transactions, data format is industry standard

In-Memory DBMS

Database that primarily stores data in a computer's main memory (RAM) rather than on disk drives

Graphic Database

Data is represented as a graph with nodes and edges

Other Databases

Redis

DynamoDB

AWS

Oracle NoSQL

Redis

• Remote Dictionary Server

• Key-Value

• Document

• Graph

DynamoDB from AWS

• Available as a cloud service

• Each table consists of a key and a group of items

• Each item contains one or more name-value pairs

• Names of each pair can vary

Cloud Databases

• Google (GCP)

• Amazon (AWS)

• Microsoft (Azure)