在上篇博客中,我们主要阐述了在windows平台下如何搭建mongodb复制集。详细博客地址: 由于篇幅有限在上篇没有对结果进行验证,在本篇博客中我们主要进行测试: 通过rs.status()命令我们可以查询到各个节点运行正常。 一、数据同步测试 在28011、28012端口上
在上篇博客中,我们主要阐述了在windows平台下如何搭建mongodb复制集。详细博客地址:
由于篇幅有限在上篇没有对结果进行验证,在本篇博客中我们主要进行测试:
通过rs.status()命令我们可以查询到各个节点运行正常。
一、数据同步测试
在28011、28012端口上进行插入:喎?http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KCjxwPjxpbWcgc3JjPQ=="http://www.2cto.com/uploadfile/Collfiles/20141103/2014110309211736.png" alt="\">
查看原因:网上找到答案
首先这是正常的,因为SECONDARY是不允许读写的, 在写多读少的应用中,使用Replica Sets来实现读写分离。通过在连接时指定或者在主库指定slaveOk,由Secondary来分担读的压力,Primary只承担写操作。对于replica set 中的secondary 节点默认是不可读的。
相详细请看:http://stackoverflow.com/questions/8990158/mongdodb-replicates-and-error-err-not-master-and-slaveok-false-code
二、故障自适应测试
当检测时主库停止心跳了后,28012把自己选举为主库,请看如下:
28012上面就可以进行插入了:
28011上面现在还是不能插入

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The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.


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