3.3. What is MongoDB?

3.3.1. Main features ¶

• MongoDB is a document storage-oriented database, which is relatively simple and easy to operate.

• You can set the index of any property in the MongoDB record (such as FirstName= “Sameer”, Address= “8 Gandhi Road”) to achieve faster sorting.

• You can create data mirrors locally or on the network, which makes MongoDB more scalable.

• If the load increases (more storage space and stronger processing power are needed), it can be distributed among other nodes in the computer network. This is called fragmentation.

• Mongo supports a rich set of query expressions. Query instructions use tags in the form of JSON to easily query objects and arrays embedded in a document.

• MongoDb usage update() The command can replace the completed document (data) or some specified data fields.

• Map/reduce in Mongodb is mainly used for batch processing and aggregation of data.

• Map and Reduce. The Map function calls emit (key,value) to traverse all the records in the collection, passing key and value to the Reduce function for processing.

• The Map and Reduce functions are written in Javascript and can be accessed through the db.runCommand Or mapreduce Command to perform the MapReduce operation.

• GridFS is a built-in feature in MongoDB that can be used to store a large number of small files.

• MongoDB allows scripts to be executed on the server. You can write a function in Javascript and execute it directly on the server, or you can store the definition of the function on the server and call it directly next time.

• MongoDB supports a variety of programming languages, such as RUBY,PYTHON,JAVA,C++,PHP,C#.

• MongoDB is easy to install.

3.3.2. History ¶

• In October 2007, MongoDB was developed by the 10gen team. It was launched for the first time in February 2009.

• On May 23, 2012, the MongoDB2.1 Development Branch released! This version uses a new architecture and includes many enhancements.

• June 6, 2012, MongoDB 2.0.6 was released, distributed document database.

• April 23, 2013, MongoDB 2.4.3 was released, which includes some performance optimizations, feature enhancements, and bug fixes.

• On August 20, 2013, MongoDB 2.4.6 was released.

• On November 1st, 2013, MongoDB 2.4.8 was released.

• ……

3.3.3. MongoDB download ¶

You can download the installation package from mongodb’s official website at https://www.mongodb.com/download-center#community . MonggoDB supports the following platforms:

• OS X 32-bit

• OS X 64-bit

• Linux 32-bit

• Linux 64-bit

• Windows 32-bit

• Windows 64-bit

• Solaris i86pc

• Solaris 64

3.3.4. Language support ¶

The official drivers for MongoDB are as follows:

• C

• C++

• C# / .NET

• Erlang

• Haskell

• Java

• JavaScript

• Lisp

• node.JS

• Perl

• PHP

• Python

• Ruby

• Scala

• Go

3.3.5. MongoDB tool ¶

There are several management tools available for MongoDB.

3.3.6. MongoDB application case ¶

Here are some practical applications of MongoDB in a company:

• Billions of records are archived on Craiglist using MongoDB.

• FourSquare, a location-based social networking site, uses MongoDB to share data on Amazon EC2’s servers.

• Shutterfly, an Internet-based social and personal publishing service, uses MongoDB for various persistent data storage requirements.

• Bit.ly, a Web-based URL shortening service, uses MongoDB to store its own data.

• Spike.com, an associate of the MTV network, spike.com uses MongoDB.

• Intuit, a software and service provider for small businesses and individuals, uses MongoDB for small businesses to track user data.

• sourceforge.net，资源网站查找，创建和发布开源软件免费，使用MongoDB的后端存储。

• Etsy.com, a website for buying and selling handmade items, uses MongoDB.

• The New York Times, one of the leading online news portals, uses MongoDB.

• Data from the large Hadron Collider at CERN, the famous particle physics institute and CERN, use MongoDB.