利用xtrabackup 全量备份的mysql5.6.40实例的100G的数据恢复MySQL5.7.24实例上到单实例消耗的时间：

服务器的环境如下：

dell r620 双颗CPU,单核心是12核心，内存是72G ,硬盘伪sata接口的企业级的SSD固态硬盘：500G

固态盘型号如下：

PD Type: SATA

Raw Size: 465.761 GB [0x3a386030 Sectors]

Inquiry Data: S3Z3NB0K116201W Samsung SSD 860 EVO 500GB RVT01B6Q

Device Speed: 6.0Gb/s

消耗时间测试演示如下：

[root@e ~]# time innobackupex --apply-log /data/backup/db_3306_20190812

InnoDB: Shutdown completed; log sequence number 143003422760

190815 16:53:30 completed OK!

real 0m13.475s

user 0m0.445s

sys 0m3.182s

[root@e db_3306_20190812]# time innobackupex --defaults-file=/data/mysql5.7/my3306.cnf --copy-back /data/backup/db_3306_20190812/

190815 17:12:06 [01] Copying ./ib_buffer_pool to /data/mysql5.7/3306/data/ib_buffer_pool

190815 17:12:06 [01] ...done

190815 17:12:06 [01] Copying ./xtrabackup_info to /data/mysql5.7/3306/data/xtrabackup_info

190815 17:12:06 [01] ...done

190815 17:12:06 [01] Copying ./xtrabackup_binlog_pos_innodb to /data/mysql5.7/3306/data/xtrabackup_binlog_pos_innodb

190815 17:12:06 [01] ...done

190815 17:12:06 [01] Copying ./xtrabackup_master_key_id to /data/mysql5.7/3306/data/xtrabackup_master_key_id

190815 17:12:06 [01] ...done

190815 17:12:06 [01] Copying ./ibtmp1 to /data/mysql5.7/3306/data/ibtmp1

190815 17:12:06 [01] ...done

190815 17:12:06 completed OK!

real 12m55.410s

user 0m0.476s

sys 3m56.766s

授权 /data/mysql5.7/3306/data 目录mysql权限：

[root@e 3306]# chown -R mysql.mysql /data/mysql5.7/3306/data

启动mysql

[root@e db_3306_20190812]# /usr/local/mysql5.7/bin/mysqld --defaults-file=/data/mysql5.7/my3306.cnf &

数据恢复完成：

[root@e binlog]# mysql -uroot -p'lnmp.org#25199' -S /tmp/3306.sock -e "show databases;"|grep testdb

Warning: Using a password on the command line interface can be insecure.

testdb01

testdb02

.。。。。。

testdb06

testdb07

testdb08

从恢复到启动mysql新实例 整个执行过程消耗的时间不到14分钟。相比较mysql自身的mysqldump工具，xtrabackup备份和恢复数据库的效率是远远高于mysqldump 的。

备份特别大的数据时，xtrabackup是首推的备份工具