NSD DBA DAY08

1 案例1：部署mycat服务

1.1 问题

把主机mysql60 配置为 MySQL59 的从服务器
把主机mysql62 配置为 MySQL61 的从服务器
把主机mycat63 配置为mycat服务器
客户端192.168.88.50访问mycat服务

1.2 方案

准备6台虚拟机，具体配置如表-1

1.3 步骤

实现此案例需要按照如下步骤进行。

步骤一：把MySQL60配置为MySQL59的从服务器

1）配置主服务器MySQL59

//启用binlog日志
$root@mysql59 \~\]# yum --y install mysql-server mysql$
$root@mysql59 \~\]# vim /etc/my.cnf.d/mysql-server.cnf$
server-id=59
log-bin=mysql59
:wq
$root@mysql59 \~\]# systemctl restart mysqld$
$root@mysql59 \~\]# mysql$
Query OK, 0 rows affected (0.11 sec)
mysql> grant replication slave on *.* to repluser@"%"; 授予权限
Query OK, 0 rows affected (0.09 sec)
//查看日志信息
mysql> show master status;
+----------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+----------------+----------+--------------+------------------+-------------------+
| mysql59.000001 | 667 | | | |
+----------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

2）配置slave服务器MySQL60

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//指定server-id 并重启数据库服务
$root@mysql60 \~\]# yum --y install mysql-serv er mysql$
$root@mysql60 \~\]# vim /etc/my.cnf.d/mysql-server.cnf$
server-id=60
:wq
$root@mysql60 \~\]# systemctl restart mysqld$
$root@mysql60 \~\]# mysql$
Query OK, 0 rows affected, 8 warnings (0.34 sec)
//启动slave进程
mysql> start slave ;
Query OK, 0 rows affected, 1 warning (0.04 sec)
//查看状态信息
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: 192.168.88.59
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql59.000001
Read_Master_Log_Pos: 667
Relay_Log_File: mysql60-relay-bin.000002
Relay_Log_Pos: 322
Relay_Master_Log_File: mysql59.000001
Slave_IO_Running: Yes //IO线程
Slave_SQL_Running: Yes //SQL线程
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 667
Relay_Log_Space: 533
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 59
Master_UUID: 38c02165-005e-11ee-bd2d-525400007271
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set, 1 warning (0.00 sec)
mysql>

步骤二：把MySQL62配置为MySQL61的从服务器

1）配置主服务器MySQL61

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//启用binlog日志
$root@mysql61 \~\]# yum --y install mysql-server mysql$
$root@mysql61 \~\]# vim /etc/my.cnf.d/mysql-server.cnf$
server-id=61
log-bin=mysql61
:wq
$root@mysql61 \~\]# systemctl restart mysqld$
$root@mysql61 \~\]# mysql$
Query OK, 0 rows affected (0.11 sec)
mysql> grant replication slave on *.* to repluser@"%"; 授予权限
Query OK, 0 rows affected (0.09 sec)
//查看日志信息
mysql> show master status;
+----------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+----------------+----------+--------------+------------------+-------------------+
| mysql61.000001 | 667 | | | |
+----------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

2）配置slave服务器MySQL62

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//指定server-id 并重启数据库服务
$root@mysql62 \~\]# yum --y install mysql-server mysql$
$root@mysql62 \~\]# vim /etc/my.cnf.d/mysql-server.cnf$
server-id=62
:wq
$root@mysql62 \~\]# systemctl restart mysqld$
$root@mysql62 \~\]# mysql$
Query OK, 0 rows affected, 8 warnings (0.34 sec)
//启动slave进程
mysql> start slave ;
Query OK, 0 rows affected, 1 warning (0.04 sec)
//查看状态信息
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: 192.168.88.61
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql61.000001
Read_Master_Log_Pos: 667
Relay_Log_File: mysql62-relay-bin.000002
Relay_Log_Pos: 322
Relay_Master_Log_File: mysql61.000001
Slave_IO_Running: Yes //IO线程
Slave_SQL_Running: Yes //SQL线程
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 667
Relay_Log_Space: 533
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 61
Master_UUID: 38c02165-005e-11ee-bd2d-525400007271
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set, 1 warning (0.00 sec)
mysql>

步骤三：把主机mycat63配置为mycat服务器。

1)拷贝软件到mycat63主机

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$root@server1 \~\]# scp /linux-soft/s3/mycat2-1.21-release-jar-with-dependencies.jar [email protected]:/root/$

2)安装mycat软件

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//安装jdk
$root@mycat63 \~\]# yum -y install java-1.8.0-openjdk.x86_64$
$root@mycat63 \~\]# which unzip \|\| yum -y install unzip$
$root@mycat63 \~\]# mv mycat /usr/local/$
$root@mycat63 \~\]# cp mycat2-1.21-release-jar-with-dependencies.jar /usr/local/mycat/lib/$
$root@mycat63 \~\]# chmod -R 777 /usr/local/mycat/$

复制代码

$root@mycat63 \~\]# vim /usr/local/mycat/conf/users/root.user.json$
"dialect":"mysql",
"ip":null,
"password":"654321",
"transactionType":"proxy",
"username":"mycat"
}
:wq

定义连接的数据库服务

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$root@mycat63 \~\]# vim /usr/local/mycat/conf/datasources/prototypeDs.data$
"dbType":"mysql",
"idleTimeout":60000,
"initSqls":[],
"initSqlsGetConnection":true,
"instanceType":"READ_WRITE",
"maxCon":1000,
"maxConnectTimeout":3000,
"maxRetryCount":5,
"minCon":1,
"name":"prototypeDs",
"password":"123456", 密码
"type":"JDBC",
"url":"jdbc:mysql://localhost:3306/mysql?useUnicode=true&serverTimezone=Asia/Shanghai&characterEncoding=UTF-8", 连接本机的数据库服务
"user":"plj", 用户名
"weight":0
}
:wq

5)在mycat63主机运行数据库服务

复制代码

$root@mycat63 \~\]# yum -y install mysql-server mysql$
//创建plj用户
$root@mycat63 \~\]# mysql$
Query OK, 0 rows affected (0.05 sec)
mysql> grant all on *.* to plj@"%" ; 授予权限
Query OK, 0 rows affected (0.39 sec)
mysql> exit
Bye
$root@mycat63 \~\]#$

复制代码

$root@mycat63 \~\]# /usr/local/mycat/bin/mycat help$
$root@mycat63 \~\]# /usr/local/mycat/bin/mycat start$
//半分钟左右能看到端口
$root@mycat63 \~\]# netstat -utnlp \| grep 8066$
$root@mycat63 \~\]#$

1）连接本机的mycat服务

复制代码

$root@mycat63 \~\]# mysql -h127.0.0.1 -P8066 -umycat -p654321$
+--------------------+
| `Database` |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
+--------------------+
3 rows in set (0.11 sec)
Mysql>

步骤五：添加数据源

1）连接本机的mycat服务，添加数据源

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$root@mycat63 \~\]# mysql -h127.0.0.1 -P8066 -umycat -p654321$
MySQL>/*+ mycat:createdatasource{
"name":"dw0", "url":"jdbc:mysql://192.168.88.59:3306","user":"plj","password":"123456"}*/;
//添加MySQL60
Mysql>/*+ mycat:createdatasource{
"name":"dr0", "url":"jdbc:mysql://192.168.88.60:3306","user":"plj","password":"123456"}*/;
//添加MySQL61
Mysql>/*+ mycat:createdatasource{
"name":"dw1", "url":"jdbc:mysql://192.168.88.61:3306","user":"plj","password":"123456"}*/;
//添加MySQL62
Mysql>/*+ mycat:createdatasource{
"name":"dr1", "url":"jdbc:mysql://192.168.88.62:3306","user":"plj","password":"123456"}*/;
Mysql>

2）查看存放目录

复制代码

$root@mycat63 \~\]# ls /usr/local/mycat/conf/datasources/$

3）查看数据信息

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mysql> /*+mycat:showDataSources{}*/ \G
*************************** 1. row ***************************
NAME: dw0
USERNAME: plj
PASSWORD: 123456
MAX_CON: 1000
MIN_CON: 1
EXIST_CON: 0
USE_CON: 0
MAX_RETRY_COUNT: 5
MAX_CONNECT_TIMEOUT: 30000
DB_TYPE: mysql
URL: jdbc:mysql://192.168.88.59:3306?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
WEIGHT: 0
INIT_SQL:
INIT_SQL_GET_CONNECTION: true
INSTANCE_TYPE: READ_WRITE
IDLE_TIMEOUT: 60000
DRIVER: {
CreateTime:"2023-05-08 16:10:26",
ActiveCount:0,
PoolingCount:0,
CreateCount:0,
DestroyCount:0,
CloseCount:0,
ConnectCount:0,
Connections:[
]
}
TYPE: JDBC
IS_MYSQL: true
*************************** 2. row ***************************
NAME: dw1
USERNAME: plj
PASSWORD: 123456
MAX_CON: 1000
MIN_CON: 1
EXIST_CON: 0
USE_CON: 0
MAX_RETRY_COUNT: 5
MAX_CONNECT_TIMEOUT: 30000
DB_TYPE: mysql
URL: jdbc:mysql://192.168.88.61:3306?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
WEIGHT: 0
INIT_SQL:
INIT_SQL_GET_CONNECTION: true
INSTANCE_TYPE: READ_WRITE
IDLE_TIMEOUT: 60000
DRIVER: {
CreateTime:"2023-05-08 16:10:26",
ActiveCount:0,
PoolingCount:0,
CreateCount:0,
DestroyCount:0,
CloseCount:0,
ConnectCount:0,
Connections:[
]
}
TYPE: JDBC
IS_MYSQL: true
*************************** 3. row ***************************
NAME: dr0
USERNAME: plj
PASSWORD: 123456
MAX_CON: 1000
MIN_CON: 1
EXIST_CON: 0
USE_CON: 0
MAX_RETRY_COUNT: 5
MAX_CONNECT_TIMEOUT: 30000
DB_TYPE: mysql
URL: jdbc:mysql://192.168.88.61:3306?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
WEIGHT: 0
INIT_SQL:
INIT_SQL_GET_CONNECTION: true
INSTANCE_TYPE: READ_WRITE
IDLE_TIMEOUT: 60000
DRIVER: {
CreateTime:"2023-05-08 16:10:26",
ActiveCount:0,
PoolingCount:0,
CreateCount:0,
DestroyCount:0,
CloseCount:0,
ConnectCount:0,
Connections:[
]
}
TYPE: JDBC
IS_MYSQL: true
*************************** 4. row ***************************
NAME: dr1
USERNAME: plj
PASSWORD: 123456
MAX_CON: 1000
MIN_CON: 1
EXIST_CON: 0
USE_CON: 0
MAX_RETRY_COUNT: 5
MAX_CONNECT_TIMEOUT: 30000
DB_TYPE: mysql
URL: jdbc:mysql://192.168.88.62:3306?useUnicode=true&serverTimezone=Asia/Shanghai&characterEncoding=UTF-8&autoReconnect=true
WEIGHT: 0
INIT_SQL:
INIT_SQL_GET_CONNECTION: true
INSTANCE_TYPE: READ_WRITE
IDLE_TIMEOUT: 60000
DRIVER: {
CreateTime:"2023-05-08 16:10:26",
ActiveCount:0,
PoolingCount:0,
CreateCount:0,
DestroyCount:0,
CloseCount:0,
ConnectCount:0,
Connections:[
]
}
TYPE: JDBC
IS_MYSQL: true
*************************** 5. row ***************************
NAME: prototypeDs
USERNAME: plj
PASSWORD: 123456
MAX_CON: 1000
MIN_CON: 1
EXIST_CON: 0
USE_CON: 0
MAX_RETRY_COUNT: 5
MAX_CONNECT_TIMEOUT: 3000
DB_TYPE: mysql
URL: jdbc:mysql://localhost:3306/mysql?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
WEIGHT: 0
INIT_SQL:
INIT_SQL_GET_CONNECTION: true
INSTANCE_TYPE: READ_WRITE
IDLE_TIMEOUT: 60000
DRIVER: {
CreateTime:"2023-05-08 16:10:26",
ActiveCount:0,
PoolingCount:0,
CreateCount:0,
DestroyCount:0,
CloseCount:0,
ConnectCount:0,
Connections:[
]
}
TYPE: JDBC
IS_MYSQL: true
5 rows in set (0.07 sec)
mysql>

步骤六：配置数据库服务器

1）在主服务器添加plj用户

复制代码

$root@mysql59 \~\]# mysql$
Mysql> grant all on *.* to plj@"%";
$root@mysql61 \~\]# mysql$
Mysql> grant all on *.* to plj@"%";

2）在从服务器查看用户是否同步

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$root@mysql60 \~\]# mysql -e 'select user from mysql.user where user="plj"'$
| user |
+------+
| plj |
+------+
$root@mysql60 \~\]#$
$root@mysql62 \~\]# mysql -e 'select user from mysql.user where user="plj"'$
| user |
+------+
| plj |
+------+
$root@host62 \~\]#$

1）连接本机的mycat服务,创建集群

复制代码

$root@mycat63 \~\]# mysql -h127.0.0.1 -P8066 -umycat -p654321$
mysql> /*!mycat:createcluster{"name":"c1","masters":["dw1"],"replicas":["dr1"]}*/;
Mysql>

2）创建的集群保存在mycat安装目录下

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$root@MySQL63 \~\]# ls /usr/local/mycat/conf/clusters/$
$root@mycat63 \~\]#$

复制代码

mysql> /*+ mycat:showClusters{}*/ \G
*************************** 1. row ***************************
NAME: prototype
SWITCH_TYPE: SWITCH
MAX_REQUEST_COUNT: 200
TYPE: BALANCE_ALL
WRITE_DS: prototypeDs
READ_DS: prototypeDs
WRITE_L: io.mycat.plug.loadBalance.BalanceRandom$1
READ_L: io.mycat.plug.loadBalance.BalanceRandom$1
AVAILABLE: true
*************************** 2. row ***************************
NAME: c0
SWITCH_TYPE: SWITCH
MAX_REQUEST_COUNT: 2000
TYPE: BALANCE_ALL
WRITE_DS: dw0
READ_DS: dw0,dr0
WRITE_L: io.mycat.plug.loadBalance.BalanceRandom$1
READ_L: io.mycat.plug.loadBalance.BalanceRandom$1
AVAILABLE: true
*************************** 3. row ***************************
NAME: c1
SWITCH_TYPE: SWITCH
MAX_REQUEST_COUNT: 2000
TYPE: BALANCE_ALL
WRITE_DS: dw1
READ_DS: dw1,dr1
WRITE_L: io.mycat.plug.loadBalance.BalanceRandom$1
READ_L: io.mycat.plug.loadBalance.BalanceRandom$1
AVAILABLE: true
3 rows in set (0.03 sec)
mysql>

2 案例2：测试配置

2.1 问题

练习全局表
练习分片表
练习ER表

2.2 方案

在客户端client50 连接mycat63 存储数据，验证mycat63的配置

2.3 步骤

实现此案例需要按照如下步骤进行。

步骤一：练习全局表

全局表数据会插入到两个库中，并且两个库中都有全部的数据。

复制代码

//在mycat63 连接本机的mycat服务建库
$root@mycat63 \~\]# mysql -h127.0.0.1 -umycat -p654321 -P8066$
Query OK, 0 rows affected (0.31 sec)
mysql> exit
Bye
$root@mycat63 \~\]#$

复制代码

$root@mycat63 \~\]# ls /usr/local/mycat/conf/schemas/tarena.schema.json$
$root@mycat63 \~\]#$

复制代码

//客户端client50 连接mycat63主机的建表存储数据
$root@client50 \~\]# mysql -h192.168.88.63 -umycat -p654321 -P8066$
Query OK, 0 rows affected (4.46 sec)
//插入记录
mysql> insert into tarena.dept values(1,"开发部"),(2,"运维部"),(3,"测试部");
Query OK, 1 row affected (0.23 sec)
//查看记录
mysql> select * from tarena.dept;
+---------+-----------+
| dept_id | dept_name |
+---------+-----------+
| 1 | 开发部 |
| 2 | 运维部 |
| 3 | 测试部 |
+---------+-----------+
3 rows in set (0.33 sec)
mysql>

在4台数据库服务器查看

复制代码

$root@mysql59 \~\]# mysql -e 'select \* from tarena.dept'$
| dept_id | dept_name |
+---------+-----------+
| 1 | 开发部 |
| 2 | 运维部 |
| 3 | 测试部 |
+---------+-----------+
$root@host61 \~\]#$
+---------+-----------+
| dept_id | dept_name |
+---------+-----------+
| 1 | 开发部 |
| 2 | 运维部 |
| 3 | 测试部 |
+---------+-----------+
$root@host62 \~\]#$
+---------+-----------+
| dept_id | dept_name |
+---------+-----------+
| 1 | 开发部 |
| 2 | 运维部 |
| 3 | 测试部 |
+---------+-----------+
$root@host63 \~\]#$
+---------+-----------+
| dept_id | dept_name |
+---------+-----------+
| 1 | 开发部 |
| 2 | 运维部 |
| 3 | 测试部 |
+---------+-----------+

步骤二：练习分片表

dbpartition 定义分库使用的分片规则，

tbpartition 定义分表使用的分片规则。

mod_hash 分片规则，用employee_id表头的值做取模计算

tbpartitions 1 表的分片数量

dbpartitions 2 库的分片数量

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//连接mycat服务建表
$root@client50 \~\]# mysql -h192.168.88.63 -P8066 -umycat --p654321$
employee_id int primary key,
name char(10),dept_id int ,
mail varchar(30)
) default charset utf8
dbpartition BY mod_hash(employee_id) tbpartition BY mod_hash(employee_id)
tbpartitions 1 dbpartitions 2;

在4台数据库服务器查看表

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$root@mysql59 \~\]# mysql -e 'show databases'$
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| tarena |
| tarena_0 |
+--------------------+
$root@mysql59 \~\]# mysql -e 'use tarena_0 ; show tables'$
| Tables_in_tarena_0 |
+--------------------+
| employees_0 |
+--------------------+
$root@host61 \~\]#$
$root@mysql60 \~\]# mysql -e 'show databases'$
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| tarena |
| tarena_0 |
+--------------------+
$root@mysql60 \~\]# mysql -e 'use tarena_0 ; show tables'$
| Tables_in_tarena_0 |
+--------------------+
| employees_0 |
+--------------------+
$root@host62 \~\]#$
$root@mysql61 \~\]# mysql -e 'show databases'$
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| tarena |
| tarena_1 |
+--------------------+
$root@mysql61 \~\]# mysql -e 'use tarena_1;show tables'$
| Tables_in_tarena_1 |
+--------------------+
| employees_1 |
+--------------------+
$root@host63 \~\]#$
$root@mysql62 \~\]# mysql -e 'show databases'$
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| tarena |
| tarena_1 |
+--------------------+
$root@mysql62 \~\]# mysql -e 'use tarena_1;show tables'$
| Tables_in_tarena_1 |
+--------------------+
| employees_1 |
+--------------------+
$root@host64 \~\]#$

复制代码

$root@client50 \~\]# mysql -h192.168.88.63 -P8066 -umycat --p654321$
Query OK, 1 row affected (0.08 sec)
mysql> insert into tarena.employees values (8,"B","3","[email protected]");
Query OK, 1 row affected (0.13 sec)
mysql> insert into tarena.employees values (7,"C","2","[email protected]");
Query OK, 1 row affected (0.02 sec)
mysql> insert into tarena.employees values (6,"C","2","[email protected]");
Query OK, 1 row affected (0.06 sec)
mysql> select * from tarena.employees;
+-------------+------+---------+-----------+
| employee_id | name | dept_id | mail |
+-------------+------+---------+-----------+
| 6 | C | 2 | [email protected] |
| 8 | B | 3 | [email protected] |
| 7 | C | 2 | [email protected] |
| 9 | a | 1 | [email protected] |
+-------------+------+---------+-----------+
4 rows in set (2.07 sec)

在数据库服务器本机查看数据

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$root@mysql59 \~\]# mysql -e 'select \* from tarena_0.employees_0'$
| employee_id | name | dept_id | mail |
+-------------+------+---------+----------+
| 6 | C | 2 | [email protected] |
| 8 | B | 3 | [email protected] |
+-------------+------+---------+----------+
$root@mysql59 \~\]#$
$root@mysql60 \~\]# mysql -e 'select \* from tarena_0.employees_0'$
| employee_id | name | dept_id | mail |
+-------------+------+---------+----------+
| 6 | C | 2 | [email protected] |
| 8 | B | 3 | [email protected] |
+-------------+------+---------+----------+
$root@mysql60 \~\]#$
$root@mysql61 \~\]# mysql -e 'select \* from tarena_1.employees_1'$
| employee_id | name | dept_id | mail |
+-------------+------+---------+-----------+
| 7 | C | 2 | [email protected] |
| 9 | a | 1 | [email protected] |
+-------------+------+---------+-----------+
$root@mysql61 \~\]#$
$root@mysql62 \~\]# mysql -e 'select \* from tarena_1.employees_1'$
| employee_id | name | dept_id | mail |
+-------------+------+---------+-----------+
| 7 | C | 2 | [email protected] |
| 9 | a | 1 | [email protected] |
+-------------+------+---------+-----------+
$root@mysql62 \~\]#$

ER表，称为关联表，表示数据逻辑上有关联性的两个或多个表，例如工资表和员工表。对于关联表，通常希望他们能够有相同的分片规则，这样在进行关联查询时，能够快速定位到同一个数据分片中。MyCat2中对于关联表，不需要有过多的声明，他可以根据分片规则自行判断。

1)连接mycat服务建表

复制代码

$root@client50 \~\]# mysql -h192.168.88.63 -P8066 -umycat --p654321$
employee_id int primary key,
p_date date , basic int , bonus int
) DEFAULT CHARSET=utf8
dbpartition BY mod_hash(employee_id)
tbpartition BY mod_hash(employee_id) tbpartitions 1;
Query OK, 1 row affected (1.93 sec)

2）在MyCat2终端查看关联表关系。

复制代码

$root@mycat63 \~\]# mysql -h127.0.0.1 -P8066 -umycat --p654321$
mysql> /*+ mycat:showErGroup{}*/ ;
+---------+------------+-----------+
| groupId | schemaName | tableName |
+---------+------------+-----------+
| 0 | tarena | employees |
| 0 | tarena | salary |
+---------+------------+-----------+
2 rows in set (0.00 sec)
mysql>

3)在2台主服务器查看表

复制代码

$root@mysql59 \~\]# mysql -e 'use tarena_0 ; show tables'$
| Tables_in_tarena_0 |
+--------------------+
| employees_0 |
| salary_0 |
+--------------------+
$root@mysql59 \~\]#$
$root@mysql61 \~\]# mysql -e 'use tarena_1;show tables'$
| Tables_in_tarena_1 |
+--------------------+
| employees_1 |
| salary_1 |
+--------------------+
$root@mysql61\~\]#$

复制代码

$root@client50 \~\]# mysql -h192.168.88.63 -P8066 -umycat --p654321$
+-------------+------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+------+------+-----+---------+-------+
| employee_id | int | NO | PRI | NULL | |
| p_date | date | YES | | NULL | |
| basic | int | YES | | NULL | |
| bonus | int | YES | | NULL | |
+-------------+------+------+-----+---------+-------+
4 rows in set (0.07 sec)
mysql> insert into tarena.salary values(6,20230110,20000,2000);
Query OK, 1 row affected (0.28 sec)
mysql> insert into tarena.salary values(7,20230210,25000,2500);
Query OK, 1 row affected (0.21 sec)
mysql> insert into tarena.salary values(8,20230310,30000,3000);
Query OK, 1 row affected (0.26 sec)
mysql> insert into tarena.salary values(9,20230410,35000,3500);
Query OK, 1 row affected (0.05 sec)
mysql> select * from tarena.salary;
+-------------+------------+-------+-------+
| employee_id | p_date | basic | bonus |
+-------------+------------+-------+-------+
| 6 | 2023-01-10 | 20000 | 2000 |
| 8 | 2023-03-10 | 30000 | 3000 |
| 7 | 2023-02-10 | 25000 | 2500 |
| 9 | 2023-04-10 | 35000 | 3500 |
+-------------+------------+-------+-------+
4 rows in set (0.16 sec)
mysql>

5)在4台数据库服务器本机查看

复制代码

$root@mysql59 \~\]# mysql -e 'select \* from tarena_0.employees_0'$
| employee_id | name | dept_id | mail |
+-------------+------+---------+----------+
| 6 | C | 2 | [email protected] |
| 8 | B | 3 | [email protected] |
+-------------+------+---------+----------+
$root@mysql59 \~\]#$
+-------------+------------+-------+-------+
| employee_id | p_date | basic | bonus |
+-------------+------------+-------+-------+
| 6 | 2023-01-10 | 20000 | 2000 |
| 8 | 2023-03-10 | 30000 | 3000 |
+-------------+------------+-------+-------+
$root@mysql60 \~\]#$
$root@mysql61 \~\]# mysql -e 'select \* from tarena_1.employees_1'$
| employee_id | name | dept_id | mail |
+-------------+------+---------+-----------+
| 7 | C | 2 | [email protected] |
| 9 | a | 1 | [email protected] |
+-------------+------+---------+-----------+
$root@mysql62 \~\]# mysql -e 'select \* from tarena_1.salary_1'$
| employee_id | p_date | basic | bonus |
+-------------+------------+-------+-------+
| 7 | 2023-02-10 | 25000 | 2500 |
| 9 | 2023-04-10 | 35000 | 3500 |
+-------------+------------+-------+-------+
$root@mysql62\~\]#$

数据分片概述、环境准备、部署MyCAT服务、全局表、分片表、ER表

NSD DBA DAY08

1 案例1：部署mycat服务

1.1 问题

1.2 方案

1.3 步骤

2 案例2：测试配置

2.1 问题

2.2 方案

2.3 步骤