MongoDB的环境主要包括StandAlone,Replication和Sharding。因为数据量和机器量的原因,项目最终用了一个Primary,一个Secondary
MongoDB的环境主要包括StandAlone,Replication和Sharding。
因为数据量和机器量的原因,项目最终用了一个Primary,一个Secondary,一个Arbitry。我自己的开发环境是Ubuntu,测试环境是CentOS。安装的是64位的MongoDB。
Ubuntu上的安装sudo apt-get install mongodb-10gen
CentOS上的安装配置yum源,创建文件:/etc/yum.repos.d/mongodb.repo
[mongodb] name=MongoDB Repository baseurl=http://downloads-distro.mongodb.org/repo/RedHat/os/x86_64/ gpgcheck=0 enabled=1
安装命令:
yum install mongo-10gen mongo-10gen-server
配置每台机器上面的配置文件/etc/mongod.conf修改成下面的:
#数据库文件所在位置(默认) dbpath=/var/lib/mongo #日志所在位置(默认) logpath=/var/log/mongo/mongod.log #pid所在位置(默认) pidfilepath = /var/run/mongodb/mongod.pid #keyFile所在位置,生成方式在后面(添加) keyFile=/var/lib/mongo/key #端口(默认) port=27017 #每次启动后日志追加在后面,不会新建日志文件(默认) logappend=true #用deamon方式启动(添加) fork=true #打开操作日志,用于故障恢复和持久化(默认) journal=true #replica set的名字(添加) replSet=test-set
在每台机器上运行:
sudo mongod -f /etc/mongod.conf
我的环境里面,Primary ip: 192.168.1.1,Secondary ip: 192.168.1.2,Arbitary ip: 192.168.1.3。在单机上可以将多个mongodb设置成不同端口,我测试了一下也是可以的。
在Primary上运行“mongo”,打开命令行,设置Replica Set:
rs.initiate( {: , : [ {: : }, {: : }, {: : , : true} ] }); { : "ok" : 1 }
历史成功后需要等一段时间,他会选举Primary,然后查看Replica Set的状态:
test-set:PRIMARY> rs.status() { : "test-set", : ISODate(), : 7, : [ { : 1, : , : 1, : 1, : , : 4086, : Timestamp(1392972480, 1), : ISODate(), : ISODate(), : ISODate(), : 0 }, { : 2, : , : 1, : 2, : , : 3997, : Timestamp(1392972480, 1), : ISODate(), : ISODate(), : ISODate(), : 0, : }, { : 3, : , : 1, : 7, : , : 5781, : true } ], : 1 }
这样整个replica set就配置成功了,还是比较简单的。
MongoDB 的详细介绍:请点这里
MongoDB 的下载地址:请点这里
相关阅读:
MongoDB备份与恢复
CentOS编译安装MongoDB
CentOS 编译安装 MongoDB与mongoDB的php扩展
CentOS 6 使用 yum 安装MongoDB及服务器端配置
Ubuntu 13.04下安装MongoDB2.4.3
如何在MongoDB中建立新数据库和集合
MongoDB入门必读(概念与实战并重)
《MongoDB 权威指南》(MongoDB: The Definitive Guide)英文文字版[PDF]

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 English version
Recommended: Win version, supports code prompts!

SublimeText3 Chinese version
Chinese version, very easy to use

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software