利用系统crontab来定时执行备份文件,按日期对备份结果进行保存,达到备份的目的。
1、创建保存备份文件的路径/mysqldata
#mkdir /mysqldata
2、创建/usr/sbin/bakmysql文件
#vi /usr/sbin/bakmysql
输入
注意:`符号是TAB键上面的符号,不是ENTER左边的
还有date后要有一个空格。
rq=` date +%Y%m%d `
tar zcvf /mysqldata/mysql$rq.tar.gz /var/lib/mysql
或者写成
rq=` date +%Y%m%d `
mysqldump --all-databases -u root -p密码 > /mysqldata/mysql$rq.sql
/var/lib/mysql是你数据库文件的目录,部分用户是/usr/local/mysql/data,每个人可能不同
/mysqldata/表示保存备份文件的目录,这个每个人也可以根据自己的要求来做。
3、修改文件属性,使其可执行
# chmod +x /usr/sbin/bakmysql
4、修改/etc/crontab
#vi /etc/crontab
在下面添加
01 3 * * * root /usr/sbin/bakmysql
表示每天3点钟执行备份
02 * * * * root /usr/sbin/bakmysql
每小时第二分钟备份一次
5、重新启动crond
# /etc/rc.d/init.d/crond restart
完成。
这样每天你在/mysqldata可以看到这样的文件
mysql20070929.tar.gz
直接下载即可

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.

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