压缩备份
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如果要加速压缩，可以使用--compress-threads选项
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--compress-threads=4 使用四个线程同时进行压缩
清除之前的备份文件
[root@service ~]# rm -rf /data/backup/*
[root@service ~]# ls /data/backup输入备份压缩命令
[root@service ~]# xtrabackup --defaults-file=/etc/my.cnf --backup --compress --target-dir=/data/backup/compressed/ -uroot -pWyxbuke00. -H localhost -P 3306
[root@service ~]# ls /data/backup
compressed停止MySQL服务，删除数据库中的文件
[root@service ~]# systemctl stop mysqld
[root@service ~]# rm -rf /var/lib/mysql/*
解压缩
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解压缩需要有 qpress 命令，由于我建了yum库，可以直接通过yum安装 yum -y install qpress
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使用 --decompress压缩的备份集在准备备份之前需要解压，解压工具是qpress。解压后的原文件不会被删除，可以使用--remove-original选项清除。
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--parallel可与--decompress选项一起使用以同时解压缩多个文件
输入解压缩命令
xtrabackup --defaults-file=/etc/my.cnf --decompress --target-dir=/data/backup/compressed/
准备备份文件
[root@service ~]# xtrabackup --prepare --target-dir=/data/backup/compressed
开始恢复
[root@service ~]# xtrabackup --defaults-file=/etc/my.cnf --copy-back --target-dir=/data/backup/compressed
查看恢复清空
[root@service ~]# chown -R mysql.mysql /var/lib/mysql
[root@service ~]# systemctl start mysqld
[root@service ~]# ls /var/lib/mysql
auto.cnf ca-key.pem db01 ibdata1 mysql performance_schema server-key.pem undo_001
binlog.000023 ca.pem '#ib_16384_0.dblwr' ibtmp1 mysql.ibd private_key.pem service-relay-bin.000001 undo_002
binlog.000024 client-cert.pem '#ib_16384_1.dblwr' '#innodb_redo' mysql.sock public_key.pem service-relay-bin.index xtrabackup_info
binlog.index client-key.pem ib_buffer_pool '#innodb_temp' mysql.sock.lock server-cert.pem sys
[root@service ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.36 MySQL Community Server - GPL
Copyright (c) 2000, 2024, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use db01;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> select * from tb_user;
+----+----------+------+
| id | name | sex |
+----+----------+------+
| 1 | Tom | 1 |
| 2 | Trigger | 0 |
| 3 | Dawn | 1 |
| 4 | sxx | 0 |
| 5 | wyx | 1 |
| 6 | asd | 1 |
| 7 | lisi | 1 |
| 8 | zhangsan | 1 |
| 9 | haha | 1 |
+----+----------+------+
9 rows in set (0.00 sec)
