What is MongoDB?

MongoDB is a document-oriented free database, often used for data collection and distributed processing (Map/Reduce), especially good at big data processing.

MongoDB is a database based on distributed file storage. Written in C++ language. Aims to provide scalable high-performance data storage solutions for WEB applications.

MongoDB is a product between relational databases and non-relational databases, is the most feature-rich among non-relational databases, most like relational databases.

macOS OS Installation and Startup

Installation

Simplest is through brew installation

brew update

# This way MongoDB is installed on Mac
brew install mongodb

# If you need latest development version
brew install mongodb --devel

Startup

# Create default data folder
mkdir -p /data/db

# Direct startup
mongod

# Specify path startup
mongod --dbpath <path to data directory>

# Connect to default port database
mongo

# Specify port connect to database
mongo --host 127.0.0.1:27017

centOS Installation and Startup

Installation

Create a file /etc/yum.repos.d/mongodb-org-4.0.repo

[mongodb-org-4.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.0/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.0.asc

Install database through yum

# This simple installation succeeds
sudo yum install -y mongodb-org

Startup

Start

sudo service mongod start

Verify service started

sudo chkconfig mongod on

Stop

sudo service mongod stop

Restart

sudo service mongod restart

Other

Start database in a front-end way

pm2 start mongo

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