The difference between MongoDB and Redis

Introduction

MongoDB is closer to relational database, support field index, cursor operation, the advantage is that the query function is very powerful, good at querying JSON data, can store massive data, but does not support transaction

MySQL is significantly less efficient when data is large, so MongoDB is more of a substitute for relational databases

Memory management mechanism

Redis data is stored in memory and is written to disk on a regular basis, and when memory is insufficient, the data is deleted using the selected LRU algorithm.

MongoDB data is stored in memory, implemented by Linux system map, when memory is not enough, only hot data is put into memory, other data storage disk

Supported data structures

Redis supports a rich data structure with list,set,hash,string, Sorted-set (ordered collection) total five species

MongoDB supports a single data structure, but supports rich data representations, indexes, most similar relational databases, and supports a very rich query language.

Performance

　　They don't have much performance, they're higher.

Reliability

　　Both of which support persistence

Cluster

　　MongoDB cluster technology is relatively mature, Redis is 3.0 before starting to support the cluster

The difference between MongoDB and Redis