文档课题：MySQL详细解析之Clone插件.
系统：rhel 7.3
数据库：MySQL 8.0.27
1、理论知识
从MySQL 8.0.17开始引入Clone插件，克隆插件允许从本地或远程MySQL Server克隆数据.克隆的数据存储在InnoDB中的schema（database）、table（表）、tablespaces（表空间）和data dictionary metadata（数据字典元数据）的物理快照.该物理快照实际上是一个功能完整的数据目录，MySQL克隆插件可以使用该数据目录恢复MySQL Server.
本地克隆：指将数据从启动克隆操作的MySQL Server克隆到该MySQL Server上另一个指定的目录下.
远程克隆：涉及到启动克隆操作的本地MySQL Server（称为"recipient"，即数据接收方）和数据源所在的远程MySQL Server（称为"donor"，即数据提供方）.在接收方上启动远程克隆操作时，克隆的数据会通过网络从发送方传输到接收方.默认情况下远程克隆操作会删除接收方数据目录中的所有数据，并将其替换为克隆的新数据.如果不希望接收方中的现有数据被删除，可以在执行克隆操作时将克隆数据指定存放在接收方中其他目录中.
对于克隆的数据本身来说，本地克隆与远程克隆操作没太大区别，克隆插件支持在复制拓扑中使用.除克隆数据外，克隆操作还能够从发送方中提取和传输复制坐标（二进制日志的位置），并将其应用于接收方，也就是说可以使用克隆插件在组复制中添加新的组成员，也可以在主从复制拓扑中添加新从库.与通过二进制日志来复制大量事务相比，通过克隆插件要快得多，效率也更高.组复制成员还可以使用克隆插件作为另一种恢复方法（如果不使用克隆插件，则必须使用基于二进制日志的传输方式进行数据恢复），克隆插件支持克隆数据加密的和数据页压缩.
2、安装Clone插件
使用克隆技术须先进行安装和配置Clone插件mysql_clone.so，以下采用两种方法安装.
2.1、install安装
使用install plugin安装，并将插件注册到mysql.plugin系统表中.
(root@Slave01) [fruitsDB]> select version();
+-----------+
| version() |
+-----------+
| 8.0.27 |
+-----------+
1 row in set (0.00 sec)
(root@Slave01) [fruitsDB]> show variables like '%read_only%';
+-----------------------+-------+
| Variable_name | Value |
+-----------------------+-------+
| innodb_read_only | OFF |
| read_only | ON |
| super_read_only | ON |
| transaction_read_only | OFF |
+-----------------------+-------+
4 rows in set (0.00 sec)
(root@Slave01) [fruitsDB]> set global super_read_only=off;
Query OK, 0 rows affected (0.00 sec)
(root@Slave01) [fruitsDB]> show plugins;
+---------------------------------+----------+--------------------+----------------------+---------+
| Name | Status | Type | Library | License |
+---------------------------------+----------+--------------------+----------------------+---------+
……
| group_replication | ACTIVE | GROUP REPLICATION | group_replication.so | GPL |
+---------------------------------+----------+--------------------+----------------------+---------+
46 rows in set (0.00 sec)
(root@Slave01) [fruitsDB]> install plugin clone soname 'mysql_clone.so';
Query OK, 0 rows affected (0.01 sec)
(root@Slave01) [fruitsDB]> set global super_read_only=on;
Query OK, 0 rows affected (0.00 sec)
(root@Slave01) [fruitsDB]> select plugin_name,plugin_status from information_schema.plugins where plugin_name='clone';
+-------------+---------------+
| plugin_name | plugin_status |
+-------------+---------------+
| clone | ACTIVE |
+-------------+---------------+
1 row in set (0.00 sec)
(root@Slave01) [fruitsDB]> show plugins;
+---------------------------------+----------+--------------------+----------------------+---------+
| Name | Status | Type | Library | License |
+---------------------------------+----------+--------------------+----------------------+---------+
……
| group_replication | ACTIVE | GROUP REPLICATION | group_replication.so | GPL |
| clone | ACTIVE | CLONE | mysql_clone.so | GPL |
+---------------------------------+----------+--------------------+----------------------+---------+
47 rows in set (0.01 sec)
说明：如上所示，成功安装clone插件.
2.2、修改配置文件
MySQL数据库的插件默认放在系统变量plugin_dir对应的目录中，在MySQL服务器启动时使用--plugin-load-add选项加载该插件，但该方法需每次启动服务器都需要指定对应的选项，可以将其配置到my.cnf文件中.
$ vi /etc/my.cnf
在[mysqld]添加如下：
plugin-load-add=mysql_clone.so
--重启数据库
# systemctl restart mysqld
Clone[(none)]> show plugins;
+---------------------------------+----------+--------------------+----------------------+---------+
| Name | Status | Type | Library | License |
+---------------------------------+----------+--------------------+----------------------+---------+
……
| mysqlx | ACTIVE | DAEMON | NULL | GPL |
| clone | ACTIVE | CLONE | mysql_clone.so | GPL |
| group_replication | ACTIVE | GROUP REPLICATION | group_replication.so | GPL |
+---------------------------------+----------+--------------------+----------------------+---------+
47 rows in set (0.00 sec)
说明：如上所示，重启数据库后，查看plugins发现已成功安装插件mysql_clone.so.
3、Clone数据库
3.1、本地克隆数据
本地克隆数据是将MySQL数据目录克隆到另一个目录，语法如下：
clone local data directory= 'path';
说明：执行以上语句，对应的用户需有backup_admin权限，且用户创建的文件或表空间必须在数据目录中，克隆的目录需为绝对路径.此处在主机名为leo-827mgr-slave01的服务器进行测试.
3.1.1、创建用户
--主库创建clone用户.
(root@Master) [fruitsDB] > select version();
+-----------+
| version() |
+-----------+
| 8.0.27 |
+-----------+
1 row in set (0.00 sec)
(root@Master) [fruitsDB] 18:25:45> create user clone_admin identified by 'clone@12345';
Query OK, 0 rows affected (0.01 sec)
(root@Master) [fruitsDB] 18:25:51> grant backup_admin on *.* to clone_admin;
Query OK, 0 rows affected (0.00 sec)
(root@Master) [fruitsDB] 18:25:56> flush privileges;
Query OK, 0 rows affected (0.00 sec)
(root@Master) [fruitsDB] 20:33:48> select user,host from mysql.user;
+------------------+-----------+
| user | host |
+------------------+-----------+
| clone_admin | % |
| repl | % |
| mysql.infoschema | localhost |
| mysql.session | localhost |
| mysql.sys | localhost |
| root | localhost |
+------------------+-----------+
6 rows in set (0.00 sec)
3.1.2、克隆数据库
--创建目录
[mysql@leo-827mgr-slave01 ~]$ mkdir -p /mysql/clone/
(root@Slave01) [fruitsDB]> show databases;
+--------------------+
| Database |
+--------------------+
| fruitsDB |
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.01 sec)
[mysql@leo-827mgr-slave02 ~]$ mysql -uclone_admin -pclone@12345
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 33
Server version: 8.0.27 MySQL Community Server - GPL
Copyright (c) 2000, 2021, 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.
(clone_admin@Slave01) [(none)]> clone local data directory='/mysql/clone/data';
Query OK, 0 rows affected (1.29 sec)
--查克隆状态
(root@Slave01) [fruitsDB]> select stage,state,end_time from performance_schema.clone_progress;
+-----------+-------------+----------------------------+
| stage | state | end_time |
+-----------+-------------+----------------------------+
| DROP DATA | Completed | 2023-10-04 10:30:38.894261 |
| FILE COPY | Completed | 2023-10-04 10:30:39.114664 |
| PAGE COPY | Completed | 2023-10-04 10:30:39.130879 |
| REDO COPY | Completed | 2023-10-04 10:30:39.135704 |
| FILE SYNC | Completed | 2023-10-04 10:30:40.074355 |
| RESTART | Not Started | NULL |
| RECOVERY | Not Started | NULL |
+-----------+-------------+----------------------------+
7 rows in set (0.00 sec)
--查执行克隆命令后的文件
[mysql@leo-827mgr-slave01 data]$ pwd
/mysql/clone/data
[mysql@leo-827mgr-slave01 data]$ ll
total 167944
drwxr-x---. 2 mysql mysql 89 Oct 4 10:30 #clone
drwxr-x---. 2 mysql mysql 24 Oct 4 10:30 fruitsDB
-rw-r-----. 1 mysql mysql 4648 Oct 4 10:30 ib_buffer_pool
-rw-r-----. 1 mysql mysql 12582912 Oct 4 10:30 ibdata1
-rw-r-----. 1 mysql mysql 50331648 Oct 4 10:30 ib_logfile0
-rw-r-----. 1 mysql mysql 50331648 Oct 4 10:30 ib_logfile1
drwxr-x---. 2 mysql mysql 6 Oct 4 10:30 mysql
-rw-r-----. 1 mysql mysql 25165824 Oct 4 10:30 mysql.ibd
drwxr-x---. 2 mysql mysql 28 Oct 4 10:30 sys
-rw-r-----. 1 mysql mysql 16777216 Oct 4 10:30 undo_001
-rw-r-----. 1 mysql mysql 16777216 Oct 4 10:30 undo_002
说明：
a、业务库fruitsDB以及系统库sys、mysql会被克隆.注意：空库、information_schema、performance_schema不会被克隆;
b、克隆命令中/mysql/clone/data目录的data为自动生成.
3.1.3、使用克隆数据恢复
--现使用克隆的目录启动数据库，先关闭mysql数据库.
[mysql@leo-827mgr-slave01 data]$ ps -ef | grep mysql
mysql 14052 1 0 Oct02 pts/0 00:00:00 /bin/sh /opt/mysql-8.0.27-linux-glibc2.17-x86_64-minimal/bin/mysqld_safe --defaults-file=/home/mysql/etc/my.cnf
mysql 14377 14052 3 Oct02 pts/0 01:33:40 /opt/mysql-8.0.27-linux-glibc2.17-x86_64-minimal/bin/mysqld --defaults-file=/home/mysql/etc/my.cnf --basedir=/opt/mysql --datadir=/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --log-error=/opt/logs/mysql_error.log --pid-file=/mysql/data/mysql.pid --socket=/mysql/data/mysql.sock --port=3306
root 14845 10988 0 Oct02 pts/0 00:00:00 su - mysql
mysql 14846 14845 0 Oct02 pts/0 00:00:00 -bash
mysql 14888 14846 0 Oct02 pts/0 00:00:00 mysql -uroot -p
root 40064 40026 0 10:20 pts/1 00:00:00 su - mysql
mysql 40065 40064 0 10:20 pts/1 00:00:00 -bash
mysql 41950 40065 0 13:24 pts/1 00:00:00 ps -ef
mysql 41951 40065 0 13:24 pts/1 00:00:00 grep --color=auto mysql
[mysql@leo-827mgr-slave01 data]$ kill -9 14052 14377
--将clone数据恢复到原目录
[mysql@leo-827mgr-slave01 data]$ cd ..
[mysql@leo-827mgr-slave01 mysql]$ mv /mysql/data /mysql/databak
[mysql@leo-827mgr-slave01 mysql]$ mv clone/data .
[mysql@leo-827mgr-slave01 mysql]$ ll data
total 167944
drwxr-x---. 2 mysql mysql 89 Oct 4 10:30 #clone
drwxr-x---. 2 mysql mysql 24 Oct 4 10:30 fruitsDB
-rw-r-----. 1 mysql mysql 4648 Oct 4 10:30 ib_buffer_pool
-rw-r-----. 1 mysql mysql 12582912 Oct 4 10:30 ibdata1
-rw-r-----. 1 mysql mysql 50331648 Oct 4 10:30 ib_logfile0
-rw-r-----. 1 mysql mysql 50331648 Oct 4 10:30 ib_logfile1
drwxr-x---. 2 mysql mysql 6 Oct 4 10:30 mysql
-rw-r-----. 1 mysql mysql 25165824 Oct 4 10:30 mysql.ibd
drwxr-x---. 2 mysql mysql 28 Oct 4 10:30 sys
-rw-r-----. 1 mysql mysql 16777216 Oct 4 10:30 undo_001
-rw-r-----. 1 mysql mysql 16777216 Oct 4 10:30 undo_002
--启动数据库
[mysql@leo-827mgr-slave01 mysql]$ mysqld_safe --defaults-file=/home/mysql/etc/my.cnf &
[1] 42128
[mysql@leo-827mgr-slave01 mysql]$ 2023-10-04T05:41:49.222267Z mysqld_safe Logging to '/opt/logs/mysql_error.log'.
2023-10-04T05:41:49.252184Z mysqld_safe Starting mysqld daemon with databases from /mysql/data
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| fruitsDB |
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.01 sec)
mysql> use fruitsDB;
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> show tables;
+--------------------+
| Tables_in_fruitsDB |
+--------------------+
| fruits |
+--------------------+
1 row in set (0.00 sec)
mysql> select * from fruits;
+------+------+------------+---------+
| f_id | s_id | f_name | f_price |
+------+------+------------+---------+
| a1 | 101 | apple | 5.20 |
| a2 | 103 | apricot | 2.20 |
| b1 | 101 | blackberry | 10.20 |
| b2 | 104 | berry | 7.60 |
| b5 | 107 | xxxx | 3.60 |
| bs1 | 102 | orange | 11.20 |
| bs2 | 105 | melon | 8.20 |
| c0 | 101 | cherry | 3.20 |
| l2 | 104 | lemon | 6.40 |
| m1 | 106 | mango | 15.70 |
| m2 | 105 | xbabay | 2.60 |
| m3 | 105 | xxtt | 11.60 |
| o2 | 103 | coconut | 9.20 |
| t1 | 102 | banana | 10.30 |
| t2 | 102 | grape | 5.30 |
| t4 | 107 | xbababa | 3.60 |
+------+------+------------+---------+
16 rows in set (0.00 sec)
说明：如上所示，成功开启数据库.
3.2、远程克隆
说明：远程克隆中源端称为捐赠者，目标端称为接收者.此处用上面主机名为leo-827mgr-slave01，IP 为192.168.133.127作为捐赠者，主机名为leo-827mgr-slave02，IP 为192.168.133.128作为接收者.
注意：如下操作在leo-827mgr-slave02上执行.
3.2.1、安装插件
(root@Slave02) [(none)]> install plugin clone soname 'mysql_clone.so';
Query OK, 0 rows affected (0.01 sec)
3.2.2、创建克隆账号
说明：此处克隆账号需要clone_admin权限，此权限比捐赠者上的克隆账号多了shutdown权限，克隆完后需要重启数据库，所以非mysqld_safe启动数据库的方式会报错，但不影响克隆，手动启动数据库即可.
(root@Slave02) [(none)]> select user,host from mysql.user;
+------------------+-----------+
| user | host |
+------------------+-----------+
| mysql.infoschema | localhost |
| mysql.session | localhost |
| mysql.sys | localhost |
| root | localhost |
+------------------+-----------+
4 rows in set (0.01 sec)
(root@Slave02) [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
(root@Slave02) [(none)]> create user clone_admin identified by 'clone@12345';
Query OK, 0 rows affected (0.02 sec)
(root@Slave02) [(none)]> grant clone_admin on *.* to clone_admin;
Query OK, 0 rows affected (0.01 sec)
3.2.3、捐赠者清单
--设置捐赠者列表清单
(root@Slave02) [(none)]> set global clone_valid_donor_list='192.168.133.127:3306';
Query OK, 0 rows affected (0.00 sec)
3.2.4、远程克隆
--用clone账号远程克隆
[mysql@leo-827mgr-slave02 ~]$ mysql -uclone_admin -pclone@12345
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.27 MySQL Community Server - GPL
Copyright (c) 2000, 2021, 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.
(clone_admin@Slave02) [(none)]> clone instance from clone_admin@'192.168.133.127':3306 identified by 'clone@12345';
Query OK, 0 rows affected (1.40 sec)
(clone_admin@Slave02) [(none)]> Restarting mysqld...
2023-10-04T09:46:03.926053Z mysqld_safe Number of processes running now: 0
2023-10-04T09:46:03.931154Z mysqld_safe mysqld restarted
3.2.5、相关查询
--查克隆详细过程
(clone_admin@Slave02) [fruitsDB]> select
-> stage,
-> state,
-> cast(begin_time as DATETIME) as "START TIME",
-> cast(end_time as DATETIME) as "FINISH TIME",
-> lpad(sys.format_time(power(10,12) * (unix_timestamp(end_time) - unix_timestamp(begin_time))), 10, ' ') as DURATION,
-> lpad(concat(format(round(estimate/1024/1024,0), 0), "MB"), 16, ' ') as "Estimate",
-> case when begin_time is NULL then LPAD('%0', 7, ' ')
-> when estimate > 0 then
-> lpad(concat(round(data*100/estimate, 0), "%"), 7, ' ')
-> when end_time is NULL then lpad('0%', 7, ' ')
-> else lpad('100%', 7, ' ')
-> end as "Done(%)"
-> from performance_schema.clone_progress;
+-----------+-----------+---------------------+---------------------+------------+------------------+---------+
| stage | state | START TIME | FINISH TIME | DURATION | Estimate | Done(%) |
+-----------+-----------+---------------------+---------------------+------------+------------------+---------+
| DROP DATA | Completed | 2023-10-04 17:45:58 | 2023-10-04 17:45:58 | 178.15 ms | 0MB | 100% |
| FILE COPY | Completed | 2023-10-04 17:45:58 | 2023-10-04 17:45:59 | 369.94 ms | 68MB | 100% |
| PAGE COPY | Completed | 2023-10-04 17:45:59 | 2023-10-04 17:45:59 | 30.94 ms | 0MB | 100% |
| REDO COPY | Completed | 2023-10-04 17:45:59 | 2023-10-04 17:45:59 | 30.11 ms | 0MB | 100% |
| FILE SYNC | Completed | 2023-10-04 17:45:59 | 2023-10-04 17:45:59 | 639.26 ms | 0MB | 100% |
| RESTART | Completed | 2023-10-04 17:45:59 | 2023-10-04 17:46:04 | 4.76 s | 0MB | 100% |
| RECOVERY | Completed | 2023-10-04 17:46:04 | 2023-10-04 17:46:05 | 857.84 ms | 0MB | 100% |
+-----------+-----------+---------------------+---------------------+------------+------------------+---------+
7 rows in set (0.00 sec)
--查克隆次数
只能看本地克隆次数，该命令记录clone命令执行次数.远程克隆时在接收者上执行，clone成功后服务重启，该值会被置零.
(root@Slave02) [fruitsDB]> show global status like 'Com_clone';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Com_clone | 0 |
+---------------+-------+
1 row in set (0.00 sec)
--查看克隆过程状态及错误
(root@Slave02) [fruitsDB]> select state,error_no,error_message from performance_schema.clone_status;
+-----------+----------+---------------+
| state | error_no | error_message |
+-----------+----------+---------------+
| Completed | 0 | |
+-----------+----------+---------------+
1 row in set (0.00 sec)
后台日志：
2023-10-04T09:45:58.186492Z 9 [Warning] [MY-013460] [InnoDB] Clone removing all user data for provisioning: Started
2023-10-04T09:45:58.353305Z 9 [Warning] [MY-013460] [InnoDB] Clone removing all user data for provisioning: Finished
2023-10-04T09:46:01.446024Z 0 [Warning] [MY-010909] [Server] /opt/mysql-8.0.27-linux-glibc2.17-x86_64-minimal/bin/mysqld: Forcing close of thread 9 user: 'clone_admin'.
2023-10-04T09:46:03.203307Z 0 [System] [MY-010910] [Server] /opt/mysql-8.0.27-linux-glibc2.17-x86_64-minimal/bin/mysqld: Shutdown complete (mysqld 8.0.27) MySQL Community Server - GPL.
2023-10-04T09:46:03.926053Z mysqld_safe Number of processes running now: 0
2023-10-04T09:46:03.931154Z mysqld_safe mysqld restarted
2023-10-04T09:46:03.946889Z 0 [Warning] [MY-010139] [Server] Changed limits: max_open_files: 1024 (requested 8161)
2023-10-04T09:46:03.946899Z 0 [Warning] [MY-010142] [Server] Changed limits: table_open_cache: 431 (requested 4000)
2023-10-04T09:46:04.180216Z 0 [System] [MY-010116] [Server] /opt/mysql-8.0.27-linux-glibc2.17-x86_64-minimal/bin/mysqld (mysqld 8.0.27) starting as process 6203
2023-10-04T09:46:04.180289Z 0 [ERROR] [MY-010338] [Server] Can't find error-message file '/opt/mysql/share/errmsg.sys'. Check error-message file location and 'lc-messages-dir' configuration directive.
2023-10-04T09:46:04.193890Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2023-10-04T09:46:05.059547Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2023-10-04T09:46:05.351777Z 0 [ERROR] [MY-011685] [Repl] Plugin group_replication reported: 'The group_replication_group_name option is mandatory'
2023-10-04T09:46:05.351828Z 0 [ERROR] [MY-011660] [Repl] Plugin group_replication reported: 'Unable to start Group Replication on boot'
2023-10-04T09:46:05.503386Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1 is enabled for channel mysql_main
2023-10-04T09:46:05.503429Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1.1 is enabled for channel mysql_main
2023-10-04T09:46:05.504920Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2023-10-04T09:46:05.505004Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2023-10-04T09:46:05.532142Z 0 [Warning] [MY-010604] [Repl] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=leo-827mgr-slave02-relay-bin' to avoid this problem.
2023-10-04T09:46:05.583868Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /tmp/mysqlx.sock
2023-10-04T09:46:05.583933Z 0 [System] [MY-010931] [Server] /opt/mysql-8.0.27-linux-glibc2.17-x86_64-minimal/bin/mysqld: ready for connections. Version: '8.0.27' socket: '/mysql/data/mysql.sock' port: 3306 MySQL Community Server - GPL.
3.2.6、远程克隆后查询
--退出重连查看数据
(root@Slave02) [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| fruitsDB |
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.01 sec)
(root@Slave02) [(none)]> use fruitsDB;
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
(root@Slave02) [fruitsDB]> show tables;
+--------------------+
| Tables_in_fruitsDB |
+--------------------+
| fruits |
+--------------------+
1 row in set (0.00 sec)
(root@Slave02) [fruitsDB]> select * from fruits;
+------+------+------------+---------+
| f_id | s_id | f_name | f_price |
+------+------+------------+---------+
| a1 | 101 | apple | 5.20 |
| a2 | 103 | apricot | 2.20 |
| b1 | 101 | blackberry | 10.20 |
| b2 | 104 | berry | 7.60 |
| b5 | 107 | xxxx | 3.60 |
| bs1 | 102 | orange | 11.20 |
| bs2 | 105 | melon | 8.20 |
| c0 | 101 | cherry | 3.20 |
| l2 | 104 | lemon | 6.40 |
| m1 | 106 | mango | 15.70 |
| m2 | 105 | xbabay | 2.60 |
| m3 | 105 | xxtt | 11.60 |
| o2 | 103 | coconut | 9.20 |
| t1 | 102 | banana | 10.30 |
| t2 | 102 | grape | 5.30 |
| t4 | 107 | xbababa | 3.60 |
+------+------+------------+---------+
16 rows in set (0.00 sec)
说明：如上所示，执行远程克隆后，数据库fruitsDB成功在远程主机上恢复.
参考网址：https://www.cnblogs.com/---wunian/p/12806418.htmlMySQL详细解析之Clone插件
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