1、创建保存备份文件的路径/mysqldata #mkdir /bak/mysqlbak 2、创建/usr/sbin/bakmysql文件 #vi /usr/sbin/bakmysql.sh
1、创建保存备份文件的路径/mysqldata
#mkdir /bak/mysqlbak
2、创建/usr/sbin/bakmysql文件
#vi /usr/sbin/bakmysql.sh
3、写入脚本如下脚本
注意,如果是你的mysql密码是带有特殊字符的,比如!@# ,那么需要在 -p参数后面加上‘’,把密码放在‘’中,'123!@#'
#!/bin/bash
#Name:bakmysql.sh
#This is a ShellScript For Auto DB Backup and Delete old Backup
backupdir=/bak/mysqlbak
time=` date +%Y%m%d%H `
mysqldump --opt -h192.168.1.1 -uroot -p123456 dbname | gzip > $backupdir/mo$time.sql.gz
#
find $backupdir -name "mo*.sql.gz" -type f -mtime +5 -exec rm {} \; > /dev/null 2>&1
脚本解析:
backupdir 数据库备份路径
time时间点
mysqldump :mysql备份工具,--opt -h 远程执行备份操作,,
dbname:数据库名称,
gzip:压缩成gzip格式的。
最后一个行是保证5最新个备份文件
4、定时任务
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
5、重新启动crond
# /etc/rc.d/init.d/crond restart (RedHat)
#/etc/init.d/cron restart (Ubuntu)
完成。
手工恢复:
先解压gz文件
gunzip xxx.gz
mysql -u root -p --default-character-set=utf8
use dbname
source /root/xx.sql
搞定
so esay ,那里不会点那里。

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.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


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

Notepad++7.3.1
Easy-to-use and free code editor

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

Dreamweaver Mac version
Visual web development tools

WebStorm Mac version
Useful JavaScript development tools

Zend Studio 13.0.1
Powerful PHP integrated development environment