Redis, NoSQL

NoSQL Non-relational database (Big data)

high concurrency and read-write are inefficient for traditional relational databases

Efficient storage and access to massive data

Requires high scalability and high availability.

Features: Easy storage, flexible data model, big data volume, high performance, highly available

Four types of storage

1. Key values for Redis quick query, but the storage data is missing the structure

2. Column storage HBase quick query, strong extensibility, but functional limitations

3. Document Database Magodb

4. Graphics database

Redis: High-performance key-value pair database

Five major types

　　String

String collection

　　Hash

List ArrayList (array), LinkedList (linked list)

Ordered String Collection Sorted-set

Application scenarios: Cache, Task queue, website access statistics, data expiration processing, application leaderboard, session separation in distributed cluster architecture

Redis, NoSQL