备份MySQL数据库的4种方式
' #查看当前二进制文件的状态, 并记录下position的数字 +------------------+----------+--------------+------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 | 106 | | |
+------------------+----------+--------------+------------------+
# mysqldump --all-databases --lock-all-tables> backup.sql #备份数据库到backup.sql文件中
mysql> CREATE DATABASE TEST1; #创建一个数据库
Query OK, 1 row affected (0.00 sec)
mysql> SHOW MASTER STATUS; #记下现在的position
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 | 191 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
# cp /var/lib/mysql/mysql-bin.000003 /root#备份二进制文件
# service mysqld stop #停止MySQL
# rm -rf /var/lib/mysql/* #删除所有的数据文件
# service mysqld start #启动MySQL, 如果是编译安装的应该不能启动(需重新初始化), 如果rpm安装则会重新初始化数据库
mysql> SHOW DATABASES; #查看数据库, 数据丢失!
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| test |
+--------------------+
3 rows in set (0.00 sec)
mysql> SET sql_log_bin=OFF; #暂时先将二进制日志关闭
Query OK, 0 rows affected (0.00 sec)
mysql> source backup.sql#恢复数据，所需时间根据数据库时间大小而定
mysql> SET sql_log_bin=ON; 开启二进制日志
mysql> SHOW DATABASES; #数据库恢复, 但是缺少TEST1
+--------------------+
| Database |
+--------------------+
| information_schema |
| employees |
| mysql |
| test |
+--------------------+
4 rows in set (0.00 sec)
# mysqlbinlog --start-position=106 --stop-position=191 mysql-bin.000003 | mysql employees #通过二进制日志增量恢复数据
mysql> SHOW DATABASES; #现在TEST1出现了！
+--------------------+
| Database |
+--------------------+
| information_schema |
| TEST1 |
| employees |
| mysql |
| test |
+--------------------+
5 rows in set (0.00 sec)
#完成
页:
[1]