1 MongoDB Installation

1.NoSQL Introduction

• NoSQL, full name not only SQL, refers to a non-relational database
• With the increase in traffic, there is a problem with the database performance of the website, so NoSQL is designed

• Advantages and Disadvantages

Benefits    High Scalability        distributed computing    the flexibility of a low-cost architecture with    no complex relationship between semi-structured data

Disadvantages    No Standardized    limited query function (so far)    eventually consistent is not intuitive program

　　

　　　　

2.MongDB Introduction

• MongoDB is a NoSQL database based on Distributed file storage
• Written by the C + + language, stable and high performance
• Designed to deliver scalable, high-performance data storage solutions for WEB applications
• View official website

MongoDB Features

• Mode freedom: You can store documents of different structures in the same database
• Collection-oriented storage: The format for storing JSON-style files
• Full index support: Index any property
• Replication and high availability: Supports data replication between servers, and supports replication between master-slave mode and server. The primary purpose of replication is to provide redundancy and automatic failover
• Automatic sharding: Supports cloud-scale scalability: auto-sharding supports level DB clusters, adding additional machines dynamically
• Rich query: Support rich query expression, query instructions using JSON form of tags, can easily query the document embedded objects and arrays
• Fast in-place updates: The query optimizer parses query expressions and generates an efficient query plan
• Efficient traditional storage: supports binary data and large objects (such as photos or pictures)

3. Installation of the environment

• Download MongoDB version, two points note
  • According to industry rules, even a stable version, such as 1.6.X, odd for the development version, such as 1.7.X
  • 32bit MongoDB can only store 2G of data, 64bit there is no limit
• To the official website, select the appropriate version to download
• Extract

TAR-ZXVF mongodb-linux-x86_64-ubuntu1604-3.4.0.tgz

　　

• Move to the/usr/local/directory

sudo mv-r mongodb-linux-x86_64-ubuntu1604-3.4.0//usr/local/mongodb

　　

• To add an executable file to a path path

Export Path=/usr/local/mongodb/bin: $PATH

　　

4. Start the Mongod server

• Configuration file in/etc/mongod.conf

• Default Port 27017

• Start

sudo service Mongod start

• Stop it

sudo service Mongod stop

• Check if MongoDB started successfully

Determine whether the Mongod process has started successfully by examining the/var/log/mongodb/mongod.log file. or view the process

5.mongo Client

• Using Terminal connections
• This shell is the client of MongoDB, but also a JS compiler.

[Email protected]:~$ mongomongodb Shell version v3.4.0connecting to:mongodb://127.0.0.1:27017mongodb Server version: 3.2.8warning:shell and server versions do not matchserver have startup warnings:2018-02-08t10:06:20.621+0800 I Control
   [initandlisten] 2018-02-08t10:06:20.621+0800 I CONTROL  [initandlisten] * * WARNING:/sys/kernel/mm/transparent_ Hugepage/enabled is ' always '. 2018-02-08t10:06:20.621+0800 I CONTROL  [initandlisten] * *        We suggest setting it to ' Never ' 2018-02-08t10:06:20.621+0800 i control  [Initandlisten] 2018-02-08t10:06:20.621+0800 i control  [ Initandlisten] * * WARNING:/sys/kernel/mm/transparent_hugepage/defrag is ' always '. 2018-02-08t10:06:20.621+0800 I Control  [Initandlisten] * *        We suggest setting it to ' Never ' 2018-02-08t10:06:20.621+0800 I CONTROL  

　　

• Command

DB View Current database name Db.stats () view current database information

　　

• Terminal Exit connection

Exit or CTRL + C

　　

6.gui:robomongo

• Gui:robomongo, unzip and locate the running program in the bin directory
• The interface is as follows:

1 MongoDB Installation