


Detailed introduction to mysql sample code for backup and restore of a single table
The editor below will bring you a brief discussionmysql on the backup and restoration of a single table. The editor thinks it is quite good, so I will share it with you now and give it as a reference for everyone. Let’s follow the editor and take a look.
A. Installation of MySQL backup tool xtrabackup
1. The binary version of percona’s official xtrabackup; binary The version can be decompressed and used.
2. Unzip xtrabackup & create connection
tar -xzvf percona-xtrabackup-2.3.4- Linux -x86_64.tar.gz -C /usr/local/ ln -s /usr/local/percona-xtrabackup-2.3.4 /usr/local/xtrabackup
3. Set PATH environmentVariable
export PATH=/usr/local/xtrabackup/bin/:$PATH
B, Create a user backup user & authorization in mysql database
##1. Create user
create user backuper@'localhost' ident if ied by 'backup123'; create user backuper@'127.0.0.1' identified by 'backup123';
2. Authorization
grant reload,lock tables,replication client,process, super on *.* to 'backuper'@'localhost'; grant create,insert,select on percona_schema.xtrabackup_history to 'backuper'@'localhost'; grant reload,lock tables,replication client,process,super on *.* to 'backuper'@'127.0.0.1'; grant create,insert,select on percona_schema.xtrabackup_history to 'backuper'@'127.0.0.1';
C. Check before backup. The main purpose of this step is to verify whether the restore is effective when doing the restore operation later. ;(There is no such step in production,##1.
select * from tempdb.dictmajor; select * from dictmajor; +--------------+-----------------+ | column_value | column_mean | +--------------+-----------------+ | 1 | 汉语言文学 | | 2 | 精算 | | 3 | 生物制药 | | 4 | 材料化学 | | 5 | 商务英语 | | 6 | 考古 | | 7 | 外交 | | 8 | 导游 | +--------------+-----------------+
D. Back up the tempdb.dictmajor table
1.Backup commandinnobackupex --host=127.0.0.1 --user=backuper --password=backup123 --port=3306 --include='tempdb.dictmajor' /tmp/tempdb
## 时间 时间
tempdb.dictmajor table (note that a table definition must be saved here, which will be used when restoring) tree /tmp/tempdb/
/tmp/tempdb/
└── 2016-09-10_18-25-16
├── backup-my.cnf
├── ibdata1
├── tempdb
│ ├── dictmajor.frm
│ └── dictmajor.ibd
├── xtrabackup_binlog_info
├── xtrabackup_checkpoints
├── xtrabackup_info
└── xtrabackup_logfile
1. Roll forward & roll back log
mysql>drop table tempdb.dictmajor;
2. Comparison with rollforward & rollback
innobackupex --apply-log --export /tmp/tempdb/2016-09-10_18-25-16/
##G, restore tempdb.dictmajor table
1. Create tempdb.dictmajor table
tree /tmp/tempdb/ /tmp/tempdb/ └── 2016-09-10_18-25-16 ├── backup-my.cnf ├── ibdata1 ├── ib_logfile0 ├── ib_logfile1 ├── tempdb │ ├── dictmajor.cfg │ ├── dictmajor.exp │ ├── dictmajor.frm │ └── dictmajor.ibd ├── xtrabackup_binlog_info ├── xtrabackup_binlog_pos_innodb ├── xtrabackup_checkpoints ├── xtrabackup_info └── xtrabackup_logfile
2. Delete the table space file of tempdb.dictmajor
create table dictmajor( column_value tinyint not null, column_mean varchar(32) not null, constraint pkdictmajor primary key (column_value));
3. Copy the table space file in the backup to the location where the tempdb.dictmajor table space should be
alter table tempdb.dictmajor discard tablespace;
cp /tmp/tempdb/2016-09-10_18-25-16/tempdb/dictmajor.ibd /usr/local/mysql/data/tempdb/ cp /tmp/tempdb/2016-09-10_18-25-16/tempdb/dictmajor.exp /usr/local/mysql/data/tempdb/ cp /tmp/tempdb/2016-09-10_18-25-16/tempdb/dictmajor.cfg /usr/local/mysql/data/tempdb/ chown -R mysql:mysql /usr/local/mysql/data/tempdb/*
5. Check the dictmajor table recovery status
alter table tempdb.dictmajor import tablespace;
- -------------------------------------------------- ------------The previous section used xtrabackup to back up the table. Its application scenario is that the data volume of a single table is large and it must be supported during the backup process. Write operations to the table; that is to say, in the current scenario, the simple
The general steps for mysqldump backup are now given
A: Create a backup user
1. select * from dictmajor;
+--------------+-----------------+
| column_value | column_mean |
+--------------+-----------------+
| 1 | 汉语言文学 |
| 2 | 精算 |
| 3 | 生物制药 |
| 4 | 材料化学 |
| 5 | 商务英语 |
| 6 | 考古 |
| 7 | 外交 |
| 8 | 导游 |
+--------------+-----------------+
B: Back up the tempdb.dictmajor table
1. create user dumper@'127.0.0.1' identified by 'dumper123';
grant select on *.* to dumper@'127.0.0.1';
grant show view on *.* to dumper@'127.0.0.1';
grant lock tables on *.* to dumper@'127.0.0.1';
grant trigger on *.* to dumper@'127.0.0.1';
C: Delete the backed up table
1.mysqldump --host=127.0.0.1 --port=3306 --user=dumper --password=dumper123 --quick tempdb dictmajor >/tmp/tempdb.dictmajor.sql
D: Restore tempdb.dictmajor table
1.
mysql>drop table tempdb.dictmajor;
E: Verify the validity of the restore
1.select * from dictmajor;
mysql -uroot -pxxxxx -h127.0.0.1 -p3306 tempdb </tmp/tempdb.dictmajor.sql
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