Table of Contents Introduction Requirements Create Replica Set Add Secondary Members Add an Arbiter Introduction A replica set provides MongoDB with redundancy and increased data availability by replicating the database to multiple servers. The prima…
Unable to connect to a member of the replica set matching the read preference Primary 今天尝试使用MongoDB Replica Set提供的自动故障恢复功能一直无法成功,总是遇到上面这个错误.好一顿整终于找到的原因,由于这里还比较有迷惑性,特此记录一下供其他人参考. 其实Google一下这个错误,在前几条结果中就有答案,但是该死的GFW屏蔽了Google Group,导致我跳过了那条结果而一直没有找到正确答案…
一.mongodb replication 介绍 官网上的第一句话就是Replication is the process of synchronizing data across multiple servers.翻译过来就是replication(复制)是跨多个服务器同步的过程,基本原理就是一个主服务器和很多从服务器通过同步日志的方式来达到数据一致的目的,并且有且只有一个主服务器,在mongodb中也叫主节点(primary node)负责写操作,而从服务器,也叫次要节点(secondary…
在搭建MongoDB(版本 3.2.9)的Replica Set时,使用 rs.status() 查看Replica Set的状态,发现一个成员异常:replica set IDs do not match,详细信息是: "lastHeartbeatMessage" : "replica set IDs do not match, ours: xxx; remote node's: yyy", "stateStr" : "(not re…
There are a bunch of different methods you can use to back up your MongoDB data, but if you want to avoid downtime and/or potential performance degradation, the most common advice seems to be that you should simply do all your backups on a slave. Thi…
近年来,随着大数据越来越火,非关系型数据库的重要性被越来越多的人所认知,越来越多的开发者逐渐加入到NoSQL的阵营中.我们知道NoSQL是Not Only SQL的意思,既然如此,很多关系型数据库所支持的特性在非关系型数据中也是同样适用,比如复制集. MongoDB是支持数据复制的,它在复制集方面的优势与其他数据复制集一样,它通过将数据部署在多个不同的服务器上,防止因单机故障而造成数据的丢失,借助数据冗余来提高数据的可靠性和安全性.而且还可以通过复制技术构建分布式数据库,提高系统…
October 27, 2015 · by Srinivas · in MongoDB MongoDB replica sets provide a number of features that most MongoDB users are going to want to leverage. Best of all they are relatively easy to setup. However, first timers often hesitate when it comes t…
Introduction of Indexes: 1> Provide high performance 2> Provide efficient execution to queries 3> Prevent collection scans 4> Create indexes to support common and user-facing queries 5> Store a small portion of collections data set 6> St…