多实例mysql的安装和管理
mysql的多实例有两种方式可以实现，两种方式各有利弊。
第一种是使用多个配置文件启动不同的进程来实现多实例，这种方式的优势逻辑简单，配置简单，缺点是管理起来不太方便。
第二种是通过官方自带的mysqld_multi使用单独的配置文件来实现多实例，这种方式定制每个实例的配置不太方面，优点是管理起来很方便，集中管理。
下面就分别来实战这两种多实例的安装和管理
先来学习第一种使用多个配置文件启动多个不同进程的情况：
环境介绍：
mysql 版本：5.1.50
操作系统：SUSE 11
mysql实例数：3个
实例占用端口分别为：3306、3307、3308
创建mysql用户
点击(此处)折叠或打开
1. /usr/sbin/groupadd mysql
2. /usr/sbin/useradd -g mysql mysql
编译安装mysql
点击(此处)折叠或打开
1. tar xzvf mysql-5.1.50.tar.gz
2. cd mysql-5.1.50
3. ./configure '--prefix=/usr/local/mysql' '--with-charset=utf8' '--with-extra-charsets=complex' '--with-pthread' '--enable-thread-safe-client' '--with-ssl' '--with-client-ldflags=-all-static' '--with-mysqld-ldflags=-all-static' '--with-plugins=partition,innobase,blackhole,myisam,innodb_plugin,heap,archive' '--enable-shared' '--enable-assembler'
4. make
5. make install
初始化数据库
点击(此处)折叠或打开
1. /usr/local/mysql/bin/mysql_install_db --basedir=/usr/local/mysql --datadir=/data/dbdata_3306 --user=mysql
2. /usr/local/mysql/bin/mysql_install_db --basedir=/usr/local/mysql --datadir=/data/dbdata_3307 --user=mysql
3. /usr/local/mysql/bin/mysql_install_db --basedir=/usr/local/mysql --datadir=/data/dbdata_3308 --user=mysql
创建配置文件
vim /data/dbdata_3306/my.cnf
3306的配置文件如下：
点击(此处)折叠或打开
1. [client]
2. port = 3306
3. socket = /data/dbdata_3306/mysql.sock
4. [mysqld]
5. datadir=/data/dbdata_3306/
6. skip-name-resolve
7. lower_case_table_names=1
8. innodb_file_per_table=1
9. port = 3306
10. socket = /data/dbdata_3306/mysql.sock
11. back_log = 50
12. max_connections = 300
13. max_connect_errors = 1000
14. table_open_cache = 2048
15. max_allowed_packet = 16M
16. binlog_cache_size = 2M
17. max_heap_table_size = 64M
18. sort_buffer_size = 2M
19. join_buffer_size = 2M
20. thread_cache_size = 64
21. thread_concurrency = 8
22. query_cache_size = 64M
23. query_cache_limit = 2M
24. ft_min_word_len = 4
25. default-storage-engine = innodb
26. thread_stack = 192K
27. transaction_isolation = REPEATABLE-READ
28. tmp_table_size = 64M
29. log-bin=mysql-bin
30. binlog_format=mixed
31. slow_query_log
32. long_query_time = 1
33. server-id = 1
34. key_buffer_size = 8M
35. read_buffer_size = 2M
36. read_rnd_buffer_size = 2M
37. bulk_insert_buffer_size = 64M
38. myisam_sort_buffer_size = 128M
39. myisam_max_sort_file_size = 10G
40. myisam_repair_threads = 1
41. myisam_recover
42. innodb_additional_mem_pool_size = 16M
43. innodb_buffer_pool_size = 200M
44. innodb_data_file_path = ibdata1:10M:autoextend
45. innodb_file_io_threads = 8
46. innodb_thread_concurrency = 16
47. innodb_flush_log_at_trx_commit = 1
48. innodb_log_buffer_size = 16M
49. innodb_log_file_size = 512M
50. innodb_log_files_in_group = 3
51. innodb_max_dirty_pages_pct = 60
52. innodb_lock_wait_timeout = 120
53. [mysqldump]
54. quick
55. max_allowed_packet = 256M
56. [mysql]
57. no-auto-rehash
58. prompt=\\u@\\d \\R:\\m>
59. [myisamchk]
60. key_buffer_size = 512M
61. sort_buffer_size = 512M
62. read_buffer = 8M
63. write_buffer = 8M
64. [mysqlhotcopy]
65. interactive-timeout
66. [mysqld_safe]
67. open-files-limit = 8192
vim /data/dbdata_3307/my.cnf
3307的配置文件如下：
点击(此处)折叠或打开
1. [client]
2. port = 3307
3. socket = /data/dbdata_3307/mysql.sock
4. [mysqld]
5. datadir=/data/dbdata_3307/
6. skip-name-resolve
7. lower_case_table_names=1
8. innodb_file_per_table=1
9. port = 3307
10. socket = /data/dbdata_3307/mysql.sock
11. back_log = 50
12. max_connections = 300
13. max_connect_errors = 1000
14. table_open_cache = 2048
15. max_allowed_packet = 16M
16. binlog_cache_size = 2M
17. max_heap_table_size = 64M
18. sort_buffer_size = 2M
19. join_buffer_size = 2M
20. thread_cache_size = 64
21. thread_concurrency = 8
22. query_cache_size = 64M
23. query_cache_limit = 2M
24. ft_min_word_len = 4
25. default-storage-engine = innodb
26. thread_stack = 192K
27. transaction_isolation = REPEATABLE-READ
28. tmp_table_size = 64M
29. log-bin=mysql-bin
30. binlog_format=mixed
31. slow_query_log
32. long_query_time = 1
33. server-id = 1
34. key_buffer_size = 8M
35. read_buffer_size = 2M
36. read_rnd_buffer_size = 2M
37. bulk_insert_buffer_size = 64M
38. myisam_sort_buffer_size = 128M
39. myisam_max_sort_file_size = 10G
40. myisam_repair_threads = 1
41. myisam_recover
42. innodb_additional_mem_pool_size = 16M
43. innodb_buffer_pool_size = 200M
44. innodb_data_file_path = ibdata1:10M:autoextend
45. innodb_file_io_threads = 8
46. innodb_thread_concurrency = 16
47. innodb_flush_log_at_trx_commit = 1
48. innodb_log_buffer_size = 16M
49. innodb_log_file_size = 512M
50. innodb_log_files_in_group = 3
51. innodb_max_dirty_pages_pct = 60
52. innodb_lock_wait_timeout = 120
53. [mysqldump]
54. quick
55. max_allowed_packet = 256M
56. [mysql]
57. no-auto-rehash
58. prompt=\\u@\\d \\R:\\m>
59. [myisamchk]
60. key_buffer_size = 512M
61. sort_buffer_size = 512M
62. read_buffer = 8M
63. write_buffer = 8M
64. [mysqlhotcopy]
65. interactive-timeout
66. [mysqld_safe]
67. open-files-limit =
vim /data/dbdata_3308/my.cnf
3308的配置文件如下：
点击(此处)折叠或打开
1. [client]
2. port = 3308
3. socket = /data/dbdata_3308/mysql.sock
4. [mysqld]
5. datadir=/data/dbdata_3308/
6. skip-name-resolve
7. lower_case_table_names=1
8. innodb_file_per_table=1
9. port = 3308
10. socket = /data/dbdata_3308/mysql.sock
11. back_log = 50
12. max_connections = 300
13. max_connect_errors = 1000
14. table_open_cache = 2048
15. max_allowed_packet = 16M
16. binlog_cache_size = 2M
17. max_heap_table_size = 64M
18. sort_buffer_size = 2M
19. join_buffer_size = 2M
20. thread_cache_size = 64
21. thread_concurrency = 8
22. query_cache_size = 64M
23. query_cache_limit = 2M
24. ft_min_word_len = 4
25. default-storage-engine = innodb
26. thread_stack = 192K
27. transaction_isolation = REPEATABLE-READ
28. tmp_table_size = 64M
29. log-bin=mysql-bin
30. binlog_format=mixed
31. slow_query_log
32. long_query_time = 1
33. server-id = 1
34. key_buffer_size = 8M
35. read_buffer_size = 2M
36. read_rnd_buffer_size = 2M
37. bulk_insert_buffer_size = 64M
38. myisam_sort_buffer_size = 128M
39. myisam_max_sort_file_size = 10G
40. myisam_repair_threads = 1
41. myisam_recover
42. innodb_additional_mem_pool_size = 16M
43. innodb_buffer_pool_size = 200M
44. innodb_data_file_path = ibdata1:10M:autoextend
45. innodb_file_io_threads = 8
46. innodb_thread_concurrency = 16
47. innodb_flush_log_at_trx_commit = 1
48. innodb_log_buffer_size = 16M
49. innodb_log_file_size = 512M
50. innodb_log_files_in_group = 3
51. innodb_max_dirty_pages_pct = 60
52. innodb_lock_wait_timeout = 120
53. [mysqldump]
54. quick
55. max_allowed_packet = 256M
56. [mysql]
57. no-auto-rehash
58. prompt=\\u@\\d \\R:\\m>
59. [myisamchk]
60. key_buffer_size = 512M
61. sort_buffer_size = 512M
62. read_buffer = 8M
63. write_buffer = 8M
64. [mysqlhotcopy]
65. interactive-timeout
66. [mysqld_safe]
67. open-files-limit = 8192
创建自动启动文件
vim /data/dbdata_3306/mysqld
3306的启动文件如下：
点击(此处)折叠或打开
1. #!/bin/bash
2. mysql_port=3306
3. mysql_username="admin"
4. mysql_password="password"
5.
6. function_start_mysql()
7. {
8. printf "Starting MySQL...\n"
9. /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/data/dbdata_${mysql_port}/my.cnf 2>&1 > /dev/null &
10. }
11.
12. function_stop_mysql()
13. {
14. printf "Stoping MySQL...\n"
15. /usr/local/mysql/bin/mysqladmin -u ${mysql_username} -p${mysql_password} -S /data/dbdata_${mysql_port}/mysql.sock shutdown
16. }
17.
18. function_restart_mysql()
19. {
20. printf "Restarting MySQL...\n"
21. function_stop_mysql
22. function_start_mysql
23. }
24.
25. function_kill_mysql()
26. {
27. kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')
28. kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')
29. }
30.
31. case $1 in
32. start)
33. function_start_mysql;;
34. stop)
35. function_stop_mysql;;
36. kill)
37. function_kill_mysql;;
38. restart)
39. function_stop_mysql
40. function_start_mysql;;
41. *)
42. echo "Usage: /data/dbdata_${mysql_port}/mysqld {start|stop|restart|kill}";;
43. esac
vim /data/dbdata_3307/mysqld
3307的启动文件如下：
点击(此处)折叠或打开
1. #!/bin/bash
2. mysql_port=3307
3. mysql_username="admin"
4. mysql_password="password"
5.
6. function_start_mysql()
7. {
8. printf "Starting MySQL...\n"
9. /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/data/dbdata_${mysql_port}/my.cnf 2>&1 > /dev/null &
10. }
11.
12. function_stop_mysql()
13. {
14. printf "Stoping MySQL...\n"
15. /usr/local/mysql/bin/mysqladmin -u ${mysql_username} -p${mysql_password} -S /data/dbdata_${mysql_port}/mysql.sock shutdown
16. }
17.
18. function_restart_mysql()
19. {
20. printf "Restarting MySQL...\n"
21. function_stop_mysql
22. function_start_mysql
23. }
24.
25. function_kill_mysql()
26. {
27. kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')
28. kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')
29. }
30.
31. case $1 in
32. start)
33. function_start_mysql;;
34. stop)
35. function_stop_mysql;;
36. kill)
37. function_kill_mysql;;
38. restart)
39. function_stop_mysql
40. function_start_mysql;;
41. *)
42. echo "Usage: /data/dbdata_${mysql_port}/mysqld {start|stop|restart|kill}";;
43. esac
vim /data/dbdata_3308/mysqld
3308的启动文件如下：
点击(此处)折叠或打开
1. #!/bin/bash
2. mysql_port=3308
3. mysql_username="admin"
4. mysql_password="password"
5.
6. function_start_mysql()
7. {
8. printf "Starting MySQL...\n"
9. /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/data/dbdata_${mysql_port}/my.cnf 2>&1 > /dev/null &
10. }
11.
12. function_stop_mysql()
13. {
14. printf "Stoping MySQL...\n"
15. /usr/local/mysql/bin/mysqladmin -u ${mysql_username} -p${mysql_password} -S /data/dbdata_${mysql_port}/mysql.sock shutdown
16. }
17.
18. function_restart_mysql()
19. {
20. printf "Restarting MySQL...\n"
21. function_stop_mysql
22. function_start_mysql
23. }
24.
25. function_kill_mysql()
26. {
27. kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')
28. kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')
29. }
30.
31. case $1 in
32. start)
33. function_start_mysql;;
34. stop)
35. function_stop_mysql;;
36. kill)
37. function_kill_mysql;;
38. restart)
39. function_stop_mysql
40. function_start_mysql;;
41. *)
42. echo "Usage: /data/dbdata_${mysql_port}/mysqld {start|stop|restart|kill}";;
43. esac
启动3306、3307、3308的mysql
点击(此处)折叠或打开
1. /data/dbdata_3306/mysqld start
2. /data/dbdata_3307/mysqld start
3. /data/dbdata_3308/mysqld start
更改原来密码（处于安全考虑，还需要删除系统中没有密码的帐号，这里省略了）：
点击(此处)折叠或打开
1. /usr/local/mysql/bin/mysqladmin -uroot password 'password' -S /data/dbdata_3306/mysql.sock
2. /usr/local/mysql/bin/mysqladmin -uroot password 'password' -S /data/dbdata_3307/mysql.sock
3. /usr/local/mysql/bin/mysqladmin -uroot password 'password' -S /data/dbdata_3308/mysql.sock
登录测试并创建关闭mysql的帐号权限，mysqld脚本要用到！
点击(此处)折叠或打开
1. /usr/local/mysql/bin/mysql -uroot -ppassword -S /data/dbdata_3308/mysql.sock
2. GRANT SHUTDOWN ON *.* TO 'admin'@'localhost' IDENTIFIED BY 'password';
3. flush privileges;
4. /usr/local/mysql/bin/mysql -uroot -ppassword -S /data/dbdata_3308/mysql.sock
5. GRANT SHUTDOWN ON *.* TO 'admin'@'localhost' IDENTIFIED BY 'password';
6. flush privileges;
7. /usr/local/mysql/bin/mysql -uroot -ppassword -S /data/dbdata_3308/mysql.sock
8. GRANT SHUTDOWN ON *.* TO 'admin'@'localhost' IDENTIFIED BY 'password';
9. flush privileges;
创建了admin帐号以后脚本的stop功能和restart功能就正常了！
更改环境变量
点击(此处)折叠或打开
1. vim /etc/profile 添加下面一行内容
2. PATH=${PATH}:/usr/local/mysql/bin/
3. source /etc/profile
添加到自动启动
点击(此处)折叠或打开
1. vim /etc/init.d/boot.local
2. /data/dbdata_3306/mysqld start
3. /data/dbdata_3307/mysqld start
4. /data/dbdata_3308/mysqld start
如果是rhel或者centos系统的话自启动文件/etc/rc.local
管理的话，在本地都是采用 -S /data/dbdata_3308/mysql.sock，如果在远程可以通过不同的端口连接上去坐管理操作。其他的和单实例的管理没什么区别！
再来看第二种通过官方自带的mysqld_multi来实现多实例实战：
这里的mysql安装以及数据库的初始化和前面的步骤一样，就不再赘述。
mysqld_multi的配置
vim /etc/my.cnf
点击(此处)折叠或打开
1. [mysqld_multi]
2. mysqld = /usr/local/mysql/bin/mysqld_safe
3. mysqladmin = /usr/local/mysql/bin/mysqladmin
4. user = admin
5. password = password
6.
7. [mysqld1]
8. socket = /data/dbdata_3306/mysql.sock
9. port = 3306
10. pid-file = /data/dbdata_3306/3306.pid
11. datadir = /data/dbdata_3306
12. user = mysql
13. skip-name-resolve
14. lower_case_table_names=1
15. innodb_file_per_table=1
16. back_log = 50
17. max_connections = 300
18. max_connect_errors = 1000
19. table_open_cache = 2048
20. max_allowed_packet = 16M
21. binlog_cache_size = 2M
22. max_heap_table_size = 64M
23. sort_buffer_size = 2M
24. join_buffer_size = 2M
25. thread_cache_size = 64
26. thread_concurrency = 8
27. query_cache_size = 64M
28. query_cache_limit = 2M
29. ft_min_word_len = 4
30. default-storage-engine = innodb
31. thread_stack = 192K
32. transaction_isolation = REPEATABLE-READ
33. tmp_table_size = 64M
34. log-bin=mysql-bin
35. binlog_format=mixed
36. slow_query_log
37. long_query_time = 1
38. server-id = 1
39. key_buffer_size = 8M
40. read_buffer_size = 2M
41. read_rnd_buffer_size = 2M
42. bulk_insert_buffer_size = 64M
43. myisam_sort_buffer_size = 128M
44. myisam_max_sort_file_size = 10G
45. myisam_repair_threads = 1
46. myisam_recover
47. innodb_additional_mem_pool_size = 16M
48. innodb_buffer_pool_size = 200M
49. innodb_data_file_path = ibdata1:10M:autoextend
50. innodb_file_io_threads = 8
51. innodb_thread_concurrency = 16
52. innodb_flush_log_at_trx_commit = 1
53. innodb_log_buffer_size = 16M
54. innodb_log_file_size = 512M
55. innodb_log_files_in_group = 3
56. innodb_max_dirty_pages_pct = 60
57. innodb_lock_wait_timeout = 120
58.
59.
60. [mysqld2]
61. socket = /data/dbdata_3307/mysql.sock
62. port = 3307
63. pid-file = /data/dbdata_3307/3307.pid
64. datadir = /data/dbdata_3307
65. user = mysql
66. skip-name-resolve
67. lower_case_table_names=1
68. innodb_file_per_table=1
69. back_log = 50
70. max_connections = 300
71. max_connect_errors = 1000
72. table_open_cache = 2048
73. max_allowed_packet = 16M
74. binlog_cache_size = 2M
75. max_heap_table_size = 64M
76. sort_buffer_size = 2M
77. join_buffer_size = 2M
78. thread_cache_size = 64
79. thread_concurrency = 8
80. query_cache_size = 64M
81. query_cache_limit = 2M
82. ft_min_word_len = 4
83. default-storage-engine = innodb
84. thread_stack = 192K
85. transaction_isolation = REPEATABLE-READ
86. tmp_table_size = 64M
87. log-bin=mysql-bin
88. binlog_format=mixed
89. slow_query_log
90. long_query_time = 1
91. server-id = 1
92. key_buffer_size = 8M
93. read_buffer_size = 2M
94. read_rnd_buffer_size = 2M
95. bulk_insert_buffer_size = 64M
96. myisam_sort_buffer_size = 128M
97. myisam_max_sort_file_size = 10G
98. myisam_repair_threads = 1
99. myisam_recover
100. innodb_additional_mem_pool_size = 16M
101. innodb_buffer_pool_size = 200M
102. innodb_data_file_path = ibdata1:10M:autoextend
103. innodb_file_io_threads = 8
104. innodb_thread_concurrency = 16
105. innodb_flush_log_at_trx_commit = 1
106. innodb_log_buffer_size = 16M
107. innodb_log_file_size = 512M
108. innodb_log_files_in_group = 3
109. innodb_max_dirty_pages_pct = 60
110. innodb_lock_wait_timeout = 120
111.
112.
113. [mysqld3]
114. socket = /data/dbdata_3308/mysql.sock
115. port = 3308
116. pid-file = /data/dbdata_3308/3308.pid
117. datadir = /data/dbdata_3308
118. user = mysql
119. skip-name-resolve
120. lower_case_table_names=1
121. innodb_file_per_table=1
122. back_log = 50
123. max_connections = 300
124. max_connect_errors = 1000
125. table_open_cache = 2048
126. max_allowed_packet = 16M
127. binlog_cache_size = 2M
128. max_heap_table_size = 64M
129. sort_buffer_size = 2M
130. join_buffer_size = 2M
131. thread_cache_size = 64
132. thread_concurrency = 8
133. query_cache_size = 64M
134. query_cache_limit = 2M
135. ft_min_word_len = 4
136. default-storage-engine = innodb
137. thread_stack = 192K
138. transaction_isolation = REPEATABLE-READ
139. tmp_table_size = 64M
140. log-bin=mysql-bin
141. binlog_format=mixed
142. slow_query_log
143. long_query_time = 1
144. server-id = 1
145. key_buffer_size = 8M
146. read_buffer_size = 2M
147. read_rnd_buffer_size = 2M
148. bulk_insert_buffer_size = 64M
149. myisam_sort_buffer_size = 128M
150. myisam_max_sort_file_size = 10G
151. myisam_repair_threads = 1
152. myisam_recover
153. innodb_additional_mem_pool_size = 16M
154. innodb_buffer_pool_size = 200M
155. innodb_data_file_path = ibdata1:10M:autoextend
156. innodb_file_io_threads = 8
157. innodb_thread_concurrency = 16
158. innodb_flush_log_at_trx_commit = 1
159. innodb_log_buffer_size = 16M
160. innodb_log_file_size = 512M
161. innodb_log_files_in_group = 3
162. innodb_max_dirty_pages_pct = 60
163. innodb_lock_wait_timeout = 120
164.
165.
166. [mysqldump]
167. quick
168. max_allowed_packet = 256M
169. [mysql]
170. no-auto-rehash
171. prompt=\\u@\\d \\R:\\m>
172. [myisamchk]
173. key_buffer_size = 512M
174. sort_buffer_size = 512M
175. read_buffer = 8M
176. write_buffer = 8M
177. [mysqlhotcopy]
178. interactive-timeout
179. [mysqld_safe]
180. open-files-limit = 8192
mysqld_multi启动
点击(此处)折叠或打开
1. /usr/local/mysql/bin/mysqld_multi start 1
2. /usr/local/mysql/bin/mysqld_multi start 2
3. /usr/local/mysql/bin/mysqld_multi start 3
或者采用一条命令的形式：
点击(此处)折叠或打开
1. /usr/local/mysql/bin/mysqld_multi start 1-3
更改原来密码（处于安全考虑，还需要删除系统中没有密码的帐号，这里省略了）：
点击(此处)折叠或打开
1. /usr/local/mysql/bin/mysqladmin -uroot password 'password' -S /data/dbdata_3306/mysql.sock
2. /usr/local/mysql/bin/mysqladmin -uroot password 'password' -S /data/dbdata_3307/mysql.sock
3. /usr/local/mysql/bin/mysqladmin -uroot password 'password' -S /data/dbdata_3308/mysql.sock
登录测试并创建admin密码(停止mysql的时候需要使用到)
点击(此处)折叠或打开
1. /usr/local/mysql/bin/mysql -uroot -ppassword -S /data/dbdata_3308/mysql.sock
2. GRANT SHUTDOWN ON *.* TO 'admin'@'localhost' IDENTIFIED BY 'password';
3. flush privileges;
4. /usr/local/mysql/bin/mysql -uroot -ppassword -S /data/dbdata_3308/mysql.sock
5. GRANT SHUTDOWN ON *.* TO 'admin'@'localhost' IDENTIFIED BY 'password';
6. flush privileges;
7. /usr/local/mysql/bin/mysql -uroot -ppassword -S /data/dbdata_3308/mysql.sock
8. GRANT SHUTDOWN ON *.* TO 'admin'@'localhost' IDENTIFIED BY 'password';
9. flush privileges;
更改环境变量
点击(此处)折叠或打开
1. vim /etc/profile
2. PATH=${PATH}:/usr/local/mysql/bin/
3. source /etc/profile
添加到自动启动
点击(此处)折叠或打开
1. vim /etc/init.d/boot.local
2. /usr/local/mysql/bin/mysqld_multi start 1-3
如果是rhel或者centos系统的话自启动文件/etc/rc.local
管理的话，在本地都是采用 -S /data/dbdata_3308/mysql.sock，如果在远程可以通过不同的端口连接上去坐管理操作。其他的和单实例的管理没什么区别！
大家在管理多实例的话可以使用mysqlmanager实例管理器，管理器来会比较方面，限于篇幅，这里就不在多做介绍！
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