Home Database Mysql Tutorial MySQL Slave异常关机的处理 (pt-slave-restart)_MySQL

MySQL Slave异常关机的处理 (pt-slave-restart)_MySQL

Jun 01, 2016 pm 01:06 PM

 

还可以使用percona-toolkit的pt-slave-restart命令。

percona-toolkit-2.2.8-1.noarch.rpm 需要安装一些依赖包。

 

  1. yum install perl perl-DBI perl-DBD-MySQL perl-IO-Socket-SSL perl-Time-HiRes

模拟异常关机的处理1.JAVA程序不断写入Master

  1. import java.sql.Connection

    ;

     

  2. import java.sql.DriverManager;
  3. import java.sql.PreparedStatement;
  4. import java.sql.SQLException;
  5. publicclassTest{
  6. publicstatic void main(String[]args)throws ClassNotFoundException,
  7. SQLException{
  8. long start=System.currentTimeMillis();
  9. Class.forName("com.mysql.jdbc.Driver");
  10. Connection connection=DriverManager.getConnection(
  11. "jdbc:mysql://192.168.1.70:3306/xx","xx","xx");
  12. connection.setAutoCommit(true);
  13. PreparedStatement cmd=connection
  14. .prepareStatement("insert into test(name) values(?)");
  15. for(inti=0;i
  16. cmd.setString(1,"test");
  17. cmd.executeUpdate();
  18. }
  19. connection.commit();
  20. cmd.close();
  21. connection.close();
  22. longend=System.currentTimeMillis();
  23. System.out.println(end-start);
  24. }
  25. }

2.关闭Slave虚拟机

在JAVA程序运行当中,直接强制关闭Slave虚拟机。然后重新启动Slave

启动之后,发现复制出现异常。(Show slave status/G)

这个表除了自增的ID,就是name字段,默认都是test

现在在slave上修改name字段为‘mysql’

update test set name='mysql';

3.使用

pt-slave-restart

命令修复错误。

  1. [root@mysql2 ~]# pt-slave-restart --user=root --password=xxxxxxx--error-numbers=1062
  2. 2014-06-16T01:17:47 p=...,u=root mysql2-relay-bin.000003 312116 1062
  3. 2014-06-16T01:17:47 p=...,u=root mysql2-relay-bin.000003 312373 1062
  4. 2014-06-16T01:17:47 p=...,u=root mysql2-relay-bin.000003 312630 1062
  5. 2014-06-16T01:17:47 p=...,u=root mysql2-relay-bin.000003 312887 1062
  6. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 313144 1062
  7. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 313401 1062
  8. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 313658 1062
  9. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 313915 1062
  10. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 314172 1062
  11. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 314429 1062
  12. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 314686 1062
  13. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 314943 1062
  14. 2014-06-16T01:17:48 p=...,u=root mysql2-relay-bin.000003 315200 1594
  15. Error 1594 is not in --error-numbers.

发现还有1594的错误

重新连接Master

参考:http://www.linuxidc.com/Linux/2014-07/104235.htm

最后查看复制的情况,已经正常运行了。

我们在Master输入的name都是test,而在Slave故障之后,将name都改为了mysql。

一般来说,处理主键重复无外乎两种方式(我能想到的)

1.忽略Master发来的重复的binlog事件

2.使用Master的binlog事件更新slave数据

如果是第一种方式,slave的name应该都是mysql

如果是第二种方式,应该前部分是mysql,后一部分是test

测试结果如下,可以初步表明使用的是第二种方式。

下面302条name为'test'的记录都是异常关机时,已经执行却没有将pos写入文件的那部分数据。

pt-slave-restart将这部分数据的binlog重新执行,所以它们的name为'test’。

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

When might a full table scan be faster than using an index in MySQL? When might a full table scan be faster than using an index in MySQL? Apr 09, 2025 am 12:05 AM

Full table scanning may be faster in MySQL than using indexes. Specific cases include: 1) the data volume is small; 2) when the query returns a large amount of data; 3) when the index column is not highly selective; 4) when the complex query. By analyzing query plans, optimizing indexes, avoiding over-index and regularly maintaining tables, you can make the best choices in practical applications.

Can I install mysql on Windows 7 Can I install mysql on Windows 7 Apr 08, 2025 pm 03:21 PM

Yes, MySQL can be installed on Windows 7, and although Microsoft has stopped supporting Windows 7, MySQL is still compatible with it. However, the following points should be noted during the installation process: Download the MySQL installer for Windows. Select the appropriate version of MySQL (community or enterprise). Select the appropriate installation directory and character set during the installation process. Set the root user password and keep it properly. Connect to the database for testing. Note the compatibility and security issues on Windows 7, and it is recommended to upgrade to a supported operating system.

Explain InnoDB Full-Text Search capabilities. Explain InnoDB Full-Text Search capabilities. Apr 02, 2025 pm 06:09 PM

InnoDB's full-text search capabilities are very powerful, which can significantly improve database query efficiency and ability to process large amounts of text data. 1) InnoDB implements full-text search through inverted indexing, supporting basic and advanced search queries. 2) Use MATCH and AGAINST keywords to search, support Boolean mode and phrase search. 3) Optimization methods include using word segmentation technology, periodic rebuilding of indexes and adjusting cache size to improve performance and accuracy.

Difference between clustered index and non-clustered index (secondary index) in InnoDB. Difference between clustered index and non-clustered index (secondary index) in InnoDB. Apr 02, 2025 pm 06:25 PM

The difference between clustered index and non-clustered index is: 1. Clustered index stores data rows in the index structure, which is suitable for querying by primary key and range. 2. The non-clustered index stores index key values ​​and pointers to data rows, and is suitable for non-primary key column queries.

MySQL: Simple Concepts for Easy Learning MySQL: Simple Concepts for Easy Learning Apr 10, 2025 am 09:29 AM

MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.

Can mysql and mariadb coexist Can mysql and mariadb coexist Apr 08, 2025 pm 02:27 PM

MySQL and MariaDB can coexist, but need to be configured with caution. The key is to allocate different port numbers and data directories to each database, and adjust parameters such as memory allocation and cache size. Connection pooling, application configuration, and version differences also need to be considered and need to be carefully tested and planned to avoid pitfalls. Running two databases simultaneously can cause performance problems in situations where resources are limited.

The relationship between mysql user and database The relationship between mysql user and database Apr 08, 2025 pm 07:15 PM

In MySQL database, the relationship between the user and the database is defined by permissions and tables. The user has a username and password to access the database. Permissions are granted through the GRANT command, while the table is created by the CREATE TABLE command. To establish a relationship between a user and a database, you need to create a database, create a user, and then grant permissions.

RDS MySQL integration with Redshift zero ETL RDS MySQL integration with Redshift zero ETL Apr 08, 2025 pm 07:06 PM

Data Integration Simplification: AmazonRDSMySQL and Redshift's zero ETL integration Efficient data integration is at the heart of a data-driven organization. Traditional ETL (extract, convert, load) processes are complex and time-consuming, especially when integrating databases (such as AmazonRDSMySQL) with data warehouses (such as Redshift). However, AWS provides zero ETL integration solutions that have completely changed this situation, providing a simplified, near-real-time solution for data migration from RDSMySQL to Redshift. This article will dive into RDSMySQL zero ETL integration with Redshift, explaining how it works and the advantages it brings to data engineers and developers.

See all articles