MongoDB Combat (1) MongoDB Installation and storage structure

First, the installation of the Linux platform

wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz

tar -zxvf mongodb-linux-x86_64-2.4.8.tgz

#Create data storage directory and log directory

/ data / db

/data/log/mongo.log

#Start the mongod service process --fork runs in the background

/ mongodb / bin / mongod --dbpath = / data / db --logpath = / data / log / mongo.log --fork

Then you can enter the mongodb client for testing

/ mongodb / bin / mongo

MongoDB combat (1) MongoDB installation and storage structure-mongodb storage structure

Data logical structure

MongoDB document is equivalent to a row of records in a relational database.

Multiple documents form a collection, which is equivalent to a relational database table.

Multiple collections are logically organized together as a database.

A MongoDB instance supports multiple databases database.

The hierarchy of documents, collections, and databases is as follows:


For those who are used to relational databases, I have compared the logical structure of MongoDB with relational databases.

In order to let everyone understand the logical structure of MongoDB more deeply