In-depth understanding of MongoDB (i) Linux configuration MongoDB all Raiders

a MongoDB introduction

MongoDB is a high-performance, open-source, modeless document-based database that is a popular one in the current NoSQL database. It can be used in many scenarios to replace a traditional relational database or key/value store, MONGO using C + + development. MONGO's official website address is: http://www.mongodb.org/, where readers can get more detailed information.

Characteristics:

It is characterized by high performance, easy to deploy, easy to use, and easy to store data. The main features are:

• for collection storage, easy to store data for object types.
• mode free.
• support dynamic queries.
• full index supported, containing internal objects.
• support query.
• support replication and recovery.
• use efficient binary data storage, including large objects such as video.
• support ruby,python,java,c++,php,c# and many more languages.
• accessible over the network.

Function:

• Collection-oriented storage: suitable for storing objects and data in JSON form.
• Dynamic query: MONGO supports rich query expressions. Query directives use a JSON-style tag to easily query objects and arrays embedded in the document.
• Full index support: Includes embedded objects and arrays in the document. The query optimizer of MONGO parses the query expression and generates an efficient query plan.
• Query monitoring: MONGO contains a monitoring tool to analyze the performance of database operations.
• Replication and automatic failover: The MONGO database supports data replication between servers, supporting master-slave mode and inter-server replication. The primary goal of replication is to provide redundancy and automatic failover.
• Efficient traditional storage: supports binary data and large objects (such as photos or pictures)
• Auto-sharding to support cloud-scale scalability: Automatic sharding supports a level of database clustering, adding additional machines dynamically.

Applicable scenarios:

• Website real-time data processing. It is ideal for real-time inserts, updates and queries, as well as the replication and high scalability required for real-time data storage on the site.
• Cache. Because of its high performance, it is suitable as a caching layer for the information infrastructure. After the system restarts, the persistent cache layer built by it can avoid overloading the underlying data sources.
• High-scalability scenarios. Ideally suited to a database of dozens of or hundreds of servers, its roadmap already includes built-in support for the MapReduce engine.

Scenario Not applicable:

• Requires a highly transactional system.
• Traditional business intelligence applications.
• Complex cross-document (table) cascading queries.

two MongoDB configuration full guide

Release Notes:

redhat:6.1 x86_64

mongodb:2.6.3

First, we go to the official website (http://www.mongodb.org/downloads) to download 64-bit Linux version of MongoDB;

Then, do the preparation before configuring MongoDB;

--Create MongoDB home directory  # mkdir/usr/local/mongodb/  --unzip the MongoDB package to the MongoDB home directory  # TAR-XVF Mongodb-linux-x86_64-2.6.3.tgz-c/usr/local/mongodb/ --create MongoDB Data directory, Can be stored in other locations, such as RAID, LVM  # mkdir/usr/local/mongodb/data/ --Create the MongoDB log directory, it is recommended to put in the Var directory  # mkdir/usr/local/mongodb/log/ 

Next, we use the Mongod command to start MongoDB, and then open another terminal, using the MONGO command to connect to MongoDB;

# cd/usr/local/mongodb/bin/#./mongod--dbpath=/usr/local/mongodb/data/--logpath=/usr/local/mongodb/log/mongo.log #./mongomongodb Shell version:2.6.3connecting to:test>

Next, configure the environment variables;

# pwd/usr/local/mongodb/bin# Vim ~/.bash_profile # TAIL-N3! $tail-n3 ~/.bash_profilepath= $PATH: $HOME/bin:/usr/local/ Mongodb/binexport path# Source! $source ~/.bash_profile

To make it easier to start and close MongoDB, we can use the shell to write scripts, of course, can also be added to the service;

# cp ssh mongodb# vim mongodb# cat mongodb#!/bin/bash## mongodstart up the MongoDB server daemon## source function lib Rary. /etc/rc.d/init.d/functions#定义命令 cmd=/usr/local/mongodb/bin/mongod#定义数据目录  Dbpath=/usr/local/mongodb/data#定义日志目录 logpath=/usr/local/mongodb/log/mongo.logstart () { #fork表示后台运行 $CMD--dbpath= $DBPATH--logpath= $LOGPATH--forkecho "MongoDB is running background ..."}stop () {Pkill Mongodecho " MongoDB is stopped. "} Case "$" instart) start; stop) stop;; *) echo $ "Usage: $ start|stop}" Esac

We can test the correctness of writing scripts;

#/etc/init.d/mongodb Startabout to fork child process, waiting until server was ready for connections.forked process:1347 Child process started successfully, parent Exitingmongodb is running background...#/etc/init.d/mongodb stopterminated

Of course, the better way is to use the configuration file, the parameters MongoDB needs to write to the configuration file, and then referenced in the script;

#代表端口号, the default is 27017 if not specified #port =27027 #MongoDB数据文件目录 Dbpath=/usr/local/mongodb/data #MongoDB日志文件目录 Logpath=/usr/local/mongodb/log/mongo.log #日志文件自动累加 logappend=true

After writing the configuration file, we need to modify the startup script;

# vim MongoDB # cat MongoDB #!/bin/bash## mongodstart up the MongoDB server daemon## source function library./etc/rc. D/init.d/functions#定义命令 cmd=/usr/local/mongodb/bin/mongod#定义配置文件路径 initfile= /usr/local/mongodb/mongodb.confstart () {#& indicates background startup, you can also use the fork parameter $CMD-F $INITFILE &echo " MongoDB is running background ... "}stop () {pkill Mongodecho" MongoDB is stopped. "} Case "$" instart) start; stop) stop;; *) echo $ "Usage: $ start|stop}" Esac

Once the writing is complete, test the script again for correctness.

[Email protected] init.d]#/etc/init.d/mongodb Startmongodb is running background ... [Email protected] init.d]#/etc/init.d/mongodb stopterminated

three PostScript

This is the first article in-depth understanding of MongoDB, this article briefly introduces MongoDB and presents the complete configuration process for Linux to the reader.

Four references

Http://baike.baidu.com/subview/3385614/9338179.htm

Good luck!

Robin

August 2, 2014