innobackupex 恢复实验

[root@localhost backup]# pwd
/backup
[root@localhost backup]# ll
总用量 8
drwxr-xr-x 3 root root 4096 Jul 20 21:41 basebackup
drwxr-xr-x 3 root root 4096 Jul 20 21:50 incbackup

全备:

[root@localhost basebackup]# innobackupex --backup /backup/basebackup
[root@localhost basebackup]# ll
总用量 4
drwx------ 7 root root 4096 Jul 20 22:04 2016-07-20_22-04-44

插入数据：

mysql> create database xx;
Query OK, 1 row affected (0.01 sec)

mysql> use xx;
Database changed
mysql> create table a ( a int)
    -> ;
Query OK, 0 rows affected (0.20 sec)

mysql> insert into a select 1;
Query OK, 1 row affected (0.16 sec)
Records: 1  Duplicates: 0  Warnings: 0

mysql> insert into a select 2;
Query OK, 1 row affected (0.02 sec)

增量备份1:

[root@localhost incbackup]# innobackupex --incremental /backup/incbackup --incremental-basedir=/backup/basebackup/2016-07-20_22-04-44
[root@localhost incbackup]# ll
总用量 4
drwx------ 8 root root 4096 Jul 20 22:08 2016-07-20_22-08-14

插入数据：

mysql> create database xx1;
Query OK, 1 row affected (0.18 sec)

mysql> use xx1;
Database changed
mysql> create table x(a int);
Query OK, 0 rows affected (0.04 sec)

mysql> insert into x select 1;
Query OK, 1 row affected (0.02 sec)
Records: 1  Duplicates: 0  Warnings: 0

增量备份2: 基于增量备份1

innobackupex --incremental /backup/incbackup --incremental-basedir=/backup/incbackup/2016-07-20_22-08-14

[root@localhost incbackup]# ll
总用量 8
drwx------ 8 root root 4096 Jul 20 22:08 2016-07-20_22-08-14
drwx------ 9 root root 4096 Jul 20 22:32 2016-07-20_22-31-55

[root@localhost 2016-07-20_22-08-14]# cat xtrabackup_checkpoints  //增量1
backup_type = incremental
from_lsn = 506272001
to_lsn = 506277876
last_lsn = 506277876
compact = 0
recover_binlog_info = 0

[root@localhost 2016-07-20_22-31-55]# cat xtrabackup_checkpoints   //增量2
backup_type = incremental
from_lsn = 506277876
to_lsn = 506282181
last_lsn = 506282181
compact = 0
recover_binlog_info = 0

[root@localhost 2016-07-20_22-04-44]# cat xtrabackup_checkpoints     //全备
backup_type = full-backuped
from_lsn = 0
to_lsn = 506272001
last_lsn = 506272001
compact = 0
recover_binlog_info = 0

增量备份恢复:

增量备份的恢复大体为3个步骤

*恢复完全备份

*恢复增量备份到完全备份（开始恢复的增量备份要添加--redo-only参数，到最后一次增量备份去掉--redo-only参数）

*对整体的完全备份进行恢复，回滚那些未提交的数据

[root@localhost /]# mysqladmin -uroot -p SHUTDOWN
[root@localhost /]# mv data databak
[root@localhost /]# mkdir data

恢复完全备份: （注意这里一定要加--redo-only参数，该参数的意思是只应用xtrabackup日志中已提交的事务数据，不回滚还未提交的数据）

[root@localhost /]# 
innobackupex --apply-log --redo-only /backup/basebackup/2016-07-20_22-04-44

恢复到增量1:

[root@localhost /]# 
innobackupex --apply-log --redo-only /backup/basebackup/2016-07-20_22-04-44 --incremental-dir=/backup/incbackup/2016-07-20_22-08-14

恢复到增量2：

[root@localhost /]# 
innobackupex --apply-log /backup/basebackup/2016-07-20_22-04-44 --incremental-dir=/backup/incbackup/2016-07-20_22-31-55

把所有合在一起的完全备份整体进行一次apply操作，回滚未提交的数据

[root@localhost /]#  innobackupex --apply-log  /backup/basebackup/2016-07-20_22-04-44

[root@localhost 2016-07-20_22-04-44]# cat xtrabackup_checkpoints
backup_type = full-prepared
from_lsn = 0
to_lsn = 506277876
last_lsn = 506277876
compact = 0
recover_binlog_info = 0

恢复文件到DATA目录

[root@localhost 2016-07-20_22-04-44]# innobackupex --datadir=/data --rsync --copy-back /backup/basebackup/2016-07-20_22-04-44/

mysql:mysql权限

[root@localhost 2016-07-20_22-04-44]# chown -R mysql:mysql /data

[root@localhost 2016-07-20_22-04-44]#
mysqld --datadir=/data --basedir=/usr/local/mysql56 --user=mysql --debug