Database Backup and Recovery
A backup of the database
The type of backup and understanding
Physical backup: 1 cold backup (offline backup): the database is in a closed state, go directly into the database file
Features: Backup fast, simple reply
2. hot backup (online backup): In the case of the database operation, the method archivelog mode database backup mode
Features: If you have a cold backup last night and again today, hot backup file, in the event of a problem, you can use these data recovery for more information
3. Backup Temperature: Temperature is generally periodic backup power, the content is updated in accordance with
Logical backup: a full backup: now all mounted from the database to the backup
2. A differential backup: This section from the last backup to the backup now
3. Incremental backup: an increase from the last backup to the current on the last backup
Specific backup method
Physical backup package
tar zcf /mysqlbak/mysql.$(date +%Y%m%d%S).tar.gz /usr/local/mysql/date/*
Special tool to back up (export database to log the contents of the database)
Back up all libraries: mysqldump --all-uroot--p123456-Databases> /mysqlbak/exercise.sql
Backup designated library: mysqldump-uroot--p123456 Exercise> /mysqlbak/exercise.sql
Backup table: the mysqldump -uroot--p123456 Exercise A> /mysqlbak/exercise.A.sql
Incremental Backup
Binary logs provided by MySQL
vim /etc/my.cnf
max_binlog_size \\ set the maximum binary log files
= MySQL-bin-log bin \\ enable binary logging
Enable to generate binary log file: /usr/local/mysql/data/master-bin.000001
log-bin=/usr/local/mysql/log/mysql-bin
flush logs;
Third-party backup tools
phpMyAdmin
Navicat Premium
Etc., etc. . . . . .
Second, restore the database
1. Direct decompression backup database to extract the packet data directory
2.mysqldump Exporting Data Recovery
method one:
First create the database, go to the library (library name and the name of the need to restore the same)
mysql>source /mysqlbak/exercise.sql
Method Two:
First create the database, exit the database (the name with the library name needs to be restored as)
mysql -uroot -p123456 exercise < /mysqlbak/exercise.sql
3. binary log recovery
To see the time by looking at the node position binary or below
Use a compiler that comes with the installation tool to view and restore mysqlbinlog
View binaries: mysqlbinlog MySQL-bin.00001
Based node recovery time (Note command format)
mysqlbinlog --stop-datetime='2020-03-06 15:28:26' /usr/local/mysql/data/master-bin.000001 | mysql -uroot -p123456
Location-based recovery (Note command format)
mysqlbinlog --stop-position='1935' /usr/local/mysql/data/master-bin.000001 |mysql -uroot -p123456
