mongoDB 副本集适合写比较少,读较多的场景,写可以使用消息队列来进行控制,这样可以减少高并发写带来的压力。副本集的使用场景
mongoDB 副本集适合写比较少,读较多的场景,写可以使用消息队列来进行控制,这样可以减少高并发写带来的压力。副本集的使用场景要根据自己的项目需求来选择,要是有着高并发的写需求,建议采用分片的方式搭建集群,在稳定性方面要比副本集要高。我这里的使用场景是将写入操作用队列控制,主要是查询多。
副本集中的副本节点在主节点挂掉后通过心跳机制检测到后,就会在集群内发起主节点的选举机制,自动选举一位新的主服务器。
主节点故障后会实现自动切换,节点数量一定要大于等于3,,否则可能会出现选主错误。官方建议为奇数节点,我这里使用3个节点。
在各个节点上分别安装mongoDB
mkdir /data/mongo/replset
#存放mongodb数据文件
mkdir -p /data/mongo/replset/data
#进入mongodb文件夹
cd /data/mongo
下载到部署包
wget
tar xzvf mongodb-linux-x86_64-2.4.12.tar
接下来在各个机器上启动,命令如下:
/data/mongo/mongodb-linux-x86_64-2.4.12/bin/mongod --fork --dbpath /data/mongo/replset/data --logpath=/data/mongo/logs/logs.info --replSet repset
注意:是后台启动,要加上fork
在三台机器上任意一台机器登陆mongodb
/data/mongo/mongodb-linux-x86_64-2.4.12/bin/mongo
use admin
定义副本集配置变量
config = { _id:"repset",
members:[
{_id:0,host:"x.x.x.8:27017"},
{_id:1,host:"x.x.x.9:27017"},
{_id:2,host:"x.x.x.10:27017"}
]}
配置成功后入如图
初始化副本集
rs.initiate(config);
查看集群节点的状态
rs.status();
测试副本集是否同步
在主节点上登陆
/data/mongo/mongodb-linux-x86_64-2.4.12/bin/mongo 127.0.0.1或者本机节点IP
建立测试数据库
use test;
db.testdb.insert({"demo":"demo"})
再到其他副本机器上查看,数据已经同步。
可以停掉主节点,然后看看自动选主的效果。
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
MongoDB入门必读(概念与实战并重)
Ubunu 14.04下MongoDB的安装指南
《MongoDB 权威指南》(MongoDB: The Definitive Guide)英文文字版[PDF]
Nagios监控MongoDB分片集群服务实战
基于CentOS 6.5操作系统搭建MongoDB服务
MongoDB 的详细介绍:请点这里
MongoDB 的下载地址:请点这里
本文永久更新链接地址:

This article explores optimizing MySQL memory usage in Docker. It discusses monitoring techniques (Docker stats, Performance Schema, external tools) and configuration strategies. These include Docker memory limits, swapping, and cgroups, alongside

This article addresses MySQL's "unable to open shared library" error. The issue stems from MySQL's inability to locate necessary shared libraries (.so/.dll files). Solutions involve verifying library installation via the system's package m

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

This article compares installing MySQL on Linux directly versus using Podman containers, with/without phpMyAdmin. It details installation steps for each method, emphasizing Podman's advantages in isolation, portability, and reproducibility, but also

This article provides a comprehensive overview of SQLite, a self-contained, serverless relational database. It details SQLite's advantages (simplicity, portability, ease of use) and disadvantages (concurrency limitations, scalability challenges). C

This guide demonstrates installing and managing multiple MySQL versions on macOS using Homebrew. It emphasizes using Homebrew to isolate installations, preventing conflicts. The article details installation, starting/stopping services, and best pra

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]


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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Dreamweaver Mac version
Visual web development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SublimeText3 Mac version
God-level code editing software (SublimeText3)

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
