MySQL5.6复制技术(2)-主从部署以及半同步配置详细过程
当前环境规划
| 主机名称 | ec2t-pgtest-01 | ec2t-pgtest-02 |
| IP地址 | 10.189.102.118 | 10.189.100.195 |
| 角色 | master | slave |
| 系统版本 | CentOS release 6.8 | |
| 数据版本 | MySQL 5.6.23 | |
一. MySQL数据库安装
1. 创建MySQL用户和组
# groupadd -g dba
# useradd -u -g dba -G root -d /usr/local/mysql mysqladmin
2. 配置MySQL用户环境变量
$ cat .bash_profile
# .bash_profile # Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi # User specific environment and startup programs PATH=/usr/local/mysql/bin:$PATH:$HOME/bin export PATH
3. 下载MySQL二进制包并安装
$ mkdir /usr/local/mysql/{data,arch}
$ wget https://downloads.mysql.com/archives/get/file/mysql-5.6.23-linux-glibc2.5-x86_64.tar.gz
$ tar -zxf mysql-5.6.-linux-glibc2.-x86_64.tar.gz
$ mv mysql-5.6.-linux-glibc2.-x86_64/* /usr/local/mysql/
4. 配置MySQL数据库(主备操作)
4.1 创建MySQL配置文件/etc/my.cnf
# cat /etc/my.cnf
[client]
port =
socket = /usr/local/mysql/data/mysql.sock [mysqld]
port =
socket = /usr/local/mysql/data/mysql.sock skip-external-locking
key_buffer_size = 256M
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 4M
query_cache_size= 32M
max_allowed_packet = 16M
myisam_sort_buffer_size=128M
tmp_table_size=32M table_open_cache =
thread_cache_size =
wait_timeout =
interactive_timeout =
max_connections = # Try number of CPU's*2 for thread_concurrency
thread_concurrency = #isolation level and default engine
default-storage-engine = INNODB
transaction-isolation = READ-COMMITTED server-id =
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
pid-file = /usr/local/mysql/data/hostname.pid #open performance schema
log-warnings
sysdate-is-now binlog_format = MIXED
log_bin_trust_function_creators=
log-error = /usr/local/mysql/data/hostname.err
log-bin=/usr/local/mysql/arch/mysql-bin
#other logs
#general_log =
#general_log_file = /usr/local/mysql/data/general_log.err
#slow_query_log=
#slow_query_log_file=/usr/local/mysql/data/slow_log.err #for replication slave
#log-slave-updates
#sync_binlog = #for innodb options
innodb_data_home_dir = /usr/local/mysql/data/
innodb_data_file_path = ibdata1:500M:autoextend
innodb_log_group_home_dir = /usr/local/mysql/arch
innodb_log_files_in_group =
innodb_log_file_size = 200M innodb_buffer_pool_size = 2048M
innodb_additional_mem_pool_size = 50M
innodb_log_buffer_size = 16M innodb_lock_wait_timeout =
#innodb_thread_concurrency =
innodb_flush_log_at_trx_commit =
innodb_locks_unsafe_for_binlog= #innodb io features: add for mysql5.5.8
performance_schema
innodb_read_io_threads=
innodb-write-io-threads=
innodb-io-capacity=
#purge threads change default() to for purge
innodb_purge_threads=
innodb_use_native_aio=on #case-sensitive file names and separate tablespace
innodb_file_per_table =
lower_case_table_names= [mysqldump]
quick
max_allowed_packet = 16M [mysql]
no-auto-rehash [mysqlhotcopy]
interactive-timeout [myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M
4.2 初始化MySQL数据库
$ scripts/mysql_install_db --user=mysqladmin --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
Installing MySQL system tables...-- :: [Warning] 'THREAD_CONCURRENCY' is deprecated and will be removed in a future release.
-- :: [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
OK Filling help tables...-- :: [Warning] 'THREAD_CONCURRENCY' is deprecated and will be removed in a future release.
-- :: [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
OK To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands: /usr/local/mysql/bin/mysqladmin -u root password 'new-password'
/usr/local/mysql/bin/mysqladmin -u root -h ec2t-userdata- password 'new-password' Alternatively you can run: /usr/local/mysql/bin/mysql_secure_installation which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers. See the manual for more instructions. You can start the MySQL daemon with: cd . ; /usr/local/mysql/bin/mysqld_safe & You can test the MySQL daemon with mysql-test-run.pl cd mysql-test ; perl mysql-test-run.pl Please report any problems at http://bugs.mysql.com/ The latest information about MySQL is available on the web at http://www.mysql.com Support MySQL by buying support/licenses at http://shop.mysql.com WARNING: Found existing config file /usr/local/mysql/my.cnf on the system.
Because this file might be in use, it was not replaced,
but was used in bootstrap (unless you used --defaults-file)
and when you later start the server.
The new default config file was created as /usr/local/mysql/my-new.cnf,
please compare it with your file and take the changes you need. WARNING: Default config file /etc/my.cnf exists on the system
This file will be read by default by the MySQL server
If you do not want to use this, either remove it, or use the
--defaults-file argument to mysqld_safe when starting the server
4.3 启动MySQL数据库,并为root用户设置密码,删除多余用户
$ /usr/local/mysql/bin/mysqld_safe &
[] 2531
$ 170714 03:34:41 mysqld_safe Logging to '/usr/local/mysql/data/hostname.err'.
170714 03:34:41 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data $ mysqladmin -u root password "mypna123"
$ mysql -u root -pmypna123
mysql> select user,password,host from mysql.user;
+------+-------------------------------------------+------------------+
| user | password | host |
+------+-------------------------------------------+------------------+
| root | *FDC33561AE905A01A945F356C99B76E1F0707B3B | localhost |
| root | | ec2t-pgtest-01 |
| root | | 127.0.0.1 |
| root | | ::1 |
| | | localhost |
| | | ec2t-pgtest-01 |
+------+-------------------------------------------+------------------+
6 rows in set (0.00 sec) mysql> delete from mysql.user where user='' or password='';
Query OK, 2 rows affected (0.01 sec) mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec) mysql> select user,password,host from mysql.user;
+------+-------------------------------------------+-----------+
| user | password | host |
+------+-------------------------------------------+-----------+
| root | *FDC33561AE905A01A945F356C99B76E1F0707B3B | localhost |
+------+-------------------------------------------+-----------+
1 row in set (0.00 sec)
4.4 安装MySQL时区
$ mysql -u root -pmypna123 -e "SELECT CONVERT_TZ('2004-01-01 12:00:00','GMT','MET');"
Warning: Using a password on the command line interface can be insecure.
+-----------------------------------------------+
| CONVERT_TZ('2004-01-01 12:00:00','GMT','MET') |
+-----------------------------------------------+
| NULL |
+-----------------------------------------------+
$ /usr/local/mysql/bin/mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root -pmypna123 mysql
Warning: Using a password on the command line interface can be insecure.
Warning: Unable to load '/usr/share/zoneinfo/iso3166.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone.tab' as time zone. Skipping it.
$ mysql -u root -pmypna123 -e "SELECT CONVERT_TZ('2004-01-01 12:00:00','GMT','MET');"
Warning: Using a password on the command line interface can be insecure.
+-----------------------------------------------+
| CONVERT_TZ('2004-01-01 12:00:00','GMT','MET') |
+-----------------------------------------------+
| 2004-01-01 13:00:00 |
+-----------------------------------------------+
$ mysql -u root -pmypna123 -e "SELECT CONVERT_TZ('2004-01-01 12:00:00','+00:00','+10:00');"
Warning: Using a password on the command line interface can be insecure.
+-----------------------------------------------------+
| CONVERT_TZ('2004-01-01 12:00:00','+00:00','+10:00') |
+-----------------------------------------------------+
| 2004-01-01 22:00:00 |
+-----------------------------------------------------+
4.5 设置MySQL服务相关
# cp /usr/local/mysql/support-files/mysql.server /etc/rc.d/init.d/mysql
# chmod +x /etc/rc.d/init.d/mysql
# chown mysqladmin:dba /etc/rc.d/init.d/mysql
# echo 'su - mysqladmin -c "/etc/init.d/mysql start --federated"' >> /etc/rc.local
# chkconfig --add mysql
# chkconfig mysql --level on
二. MySQL主从复制部署
1. 同步主备库时间,可在主库搭建NTP SERVER,备库作为NTP client
2. 添加hosts文件解析确保主备可以互相解析host主机名
3. 主库做以下操作
3.1 启用二进制日志
$ grep "log-bin" /etc/my.cnf
log-bin=/usr/local/mysql/arch/mysql-bin
3.2 选择一个唯一的server-id
$ grep "server-id" /etc/my.cnf
server-id =
3.3 创建具有复制权限的用户
mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%' IDENTIFIED BY 'repl';
Query OK, 0 rows affected (0.00 sec) mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
4. 备库做以下操作
4.1 启用中继日志
$ grep "relay-log" /etc/my.cnf
relay-log = /usr/local/mysql/arch/relay-bin
relay-log-index = /usr/local/mysql/arch/relay-log-index
4.2 选择一个唯一的server-id
$ grep "server-id" /etc/my.cnf
server-id =
4.3 创建具有复制权限的用户(可选,switchover为主库的时候需要)
mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%' IDENTIFIED BY 'repl';
Query OK, 0 rows affected (0.00 sec) mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
4.4 从服务器开启二进制日志(可选,做级联复制的时候需要)
$ grep "log-bin" /etc/my.cnf
log-bin=/usr/local/mysql/arch/mysql-bin
4.5 从服务器更新操作记入二进制日志(可选,做级联复制的时候需要)
$ grep "log-slave-updates" /etc/my.cnf
log-slave-updates = true
4.6 锁定从服务器为只读(可选,安全起见,备库设为只读)
$ grep "read-only" /etc/my.cnf
read-only =
5. 查看主库当前binary log和postion
mysql> show master status\G
*************************** 1. row ***************************
File: mysql-bin.000004
Position: 397
Binlog_Do_DB:
Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)
6. 在从库连接主库
mysql> CHANGE MASTER TO MASTER_HOST='ec2t-pgtest-01',MASTER_USER='repl',MASTER_PASSWORD='repl',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000004',MASTER_LOG_POS=397;
Query OK, 0 rows affected, 2 warnings (0.07 sec) mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: ec2t-pgtest-01
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 120
Relay_Log_File: relay-bin.000004
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000004
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
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: 120
Relay_Log_Space: 613
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: 1
Master_UUID: 342fbbf4-6896-11e7-822f-0ad588ebcbcc
Master_Info_File: /data/01/local/mysql/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
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
1 row in set (0.00 sec)
注意:如果此时主库已经运行一段时间,并且有大量数据存在,需要使用mysqldump命令将主库导出（要指定记录导出时的二进制文件和position）。然后把导出来的数据再次导入进从服务器，此时，再去连接主服务器就需要指定从主服务器的哪个二进制文件和position开始复制数据了。而怎么知道从哪个二进制文件和position开始复制数据呢？就是从mysqldump导出数据文件中记录了导出数据时的二进制文件和position,可以试用一下命令将主库导出
$ mysqldump -u root -pmypna123 --flush-privileges --single-transaction --master-data=2 --all-databases > all_database.sql
7. 在主库查看从库信息
mysql> show slave hosts;
+-----------+------+------+-----------+--------------------------------------+
| Server_id | Host | Port | Master_id | Slave_UUID |
+-----------+------+------+-----------+--------------------------------------+
| 2 | | 3306 | 1 | b88d1498-68f5-11e7-849e-0a0ce639fa30 |
+-----------+------+------+-----------+--------------------------------------+
1 row in set (0.00 sec)
二. MySQL主从半同步复制部署
半同步机制
a. 当Master上开启半同步复制的功能时，至少应该有一个Slave开启其功能。此时，一个线程在Master上提交事务将受到阻塞，直到得知一个已开启半同步复制功能的Slave已收到此事务的所有事件，或等待超时。
b. 当Slave主机连接到Master时，能够查看其是否处于半同步复制的机制。
c. 当一个事务的事件都已写入其relay-log中且已刷新到磁盘上，Slave才会告知已收到。
d. 如果等待超时，也就是Master没被告知已收到，此时Master会自动转换为异步复制的机制。当至少一个半同步的Slave赶上了，Master与其Slave自动转换为半同步复制的机制。
e. 半同步复制的功能要在Master，Slave都开启，半同步复制才会起作用；否则，只开启一边，它依然为异步复制。
1. 在主库安装半同步插件
1.1 查看主库未开启半同步时的状态
mysql> show status like '%semi%';
Empty set (0.00 sec) mysql> show variables like '%semi%';
Empty set (0.00 sec) mysql> show plugins;
+----------------------------+----------+--------------------+---------+---------+
| Name | Status | Type | Library | License |
+----------------------------+----------+--------------------+---------+---------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |
| mysql_native_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| mysql_old_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| sha256_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |
| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |
| InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL |
| INNODB_TRX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCKS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCK_WAITS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_PER_INDEX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_PER_INDEX_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_PAGE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_PAGE_LRU | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_POOL_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_METRICS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_DEFAULT_STOPWORD | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_BEING_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_CONFIG | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_INDEX_CACHE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_INDEX_TABLE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLESTATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_INDEXES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_COLUMNS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FIELDS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FOREIGN | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FOREIGN_COLS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLESPACES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_DATAFILES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| PERFORMANCE_SCHEMA | ACTIVE | STORAGE ENGINE | NULL | GPL |
| BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| FEDERATED | DISABLED | STORAGE ENGINE | NULL | GPL |
| ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| partition | ACTIVE | STORAGE ENGINE | NULL | GPL |
+----------------------------+----------+--------------------+---------+---------+
1.2 查看主库的半同步插件
$ ls -lh /usr/local/mysql/lib/plugin/semisync_master.so
-rwxr-x--- mysqladmin dba 408K Jan /usr/local/mysql/lib/plugin/semisync_master.so
1.3 安装主库的半同步插件
mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so';
Query OK, 0 rows affected (0.02 sec) mysql> set global rpl_semi_sync_master_enabled = 1;
Query OK, 0 rows affected (0.00 sec) mysql> set global rpl_semi_sync_master_timeout = 5000;
Query OK, 0 rows affected (0.00 sec)
安装后启动和定制主从连接错误的超时时间默认是10s可改为5s，一旦有一次超时自动降级为异步。（以上内容要想永久有效需要写到配置文件中）
$ grep rpl_semi_sync /etc/my.cnf
rpl_semi_sync_master_enabled = ;
rpl_semi_sync_master_timeout = ;
1.4 查看主库安装好半同步插件的状态
mysql> show status like '%semi%';
+--------------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------------+-------+
| Rpl_semi_sync_master_clients | 0 |
| Rpl_semi_sync_master_net_avg_wait_time | 0 |
| Rpl_semi_sync_master_net_wait_time | 0 |
| Rpl_semi_sync_master_net_waits | 0 |
| Rpl_semi_sync_master_no_times | 0 |
| Rpl_semi_sync_master_no_tx | 0 |
| Rpl_semi_sync_master_status | ON |
| Rpl_semi_sync_master_timefunc_failures | 0 |
| Rpl_semi_sync_master_tx_avg_wait_time | 0 |
| Rpl_semi_sync_master_tx_wait_time | 0 |
| Rpl_semi_sync_master_tx_waits | 0 |
| Rpl_semi_sync_master_wait_pos_backtraverse | 0 |
| Rpl_semi_sync_master_wait_sessions | 0 |
| Rpl_semi_sync_master_yes_tx | 0 |
+--------------------------------------------+-------+
14 rows in set (0.00 sec) mysql> show variables like '%semi%';
+------------------------------------+-------+
| Variable_name | Value |
+------------------------------------+-------+
| rpl_semi_sync_master_enabled | ON |
| rpl_semi_sync_master_timeout | 10000 |
| rpl_semi_sync_master_trace_level | 32 |
| rpl_semi_sync_master_wait_no_slave | ON |
+------------------------------------+-------+
4 rows in set (0.02 sec) mysql> show plugins;
+----------------------------+----------+--------------------+--------------------+---------+
| Name | Status | Type | Library | License |
+----------------------------+----------+--------------------+--------------------+---------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |
| mysql_native_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| mysql_old_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| sha256_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |
| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |
| InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL |
| INNODB_TRX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCKS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCK_WAITS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_PER_INDEX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_PER_INDEX_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_PAGE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_PAGE_LRU | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_POOL_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_METRICS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_DEFAULT_STOPWORD | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_BEING_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_CONFIG | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_INDEX_CACHE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_INDEX_TABLE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLESTATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_INDEXES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_COLUMNS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FIELDS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FOREIGN | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FOREIGN_COLS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLESPACES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_DATAFILES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| PERFORMANCE_SCHEMA | ACTIVE | STORAGE ENGINE | NULL | GPL |
| BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| FEDERATED | DISABLED | STORAGE ENGINE | NULL | GPL |
| ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| partition | ACTIVE | STORAGE ENGINE | NULL | GPL |
| rpl_semi_sync_master | ACTIVE | REPLICATION | semisync_master.so | GPL |
+----------------------------+----------+--------------------+--------------------+---------+
2. 在从库安装半同步插件
2.1 查看从库未开启半同步时的状态
mysql> show status like '%semi%';
Empty set (0.00 sec) mysql> show variables like '%semi%';
Empty set (0.00 sec) mysql> show plugins;
+----------------------------+----------+--------------------+---------+---------+
| Name | Status | Type | Library | License |
+----------------------------+----------+--------------------+---------+---------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |
| mysql_native_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| mysql_old_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| sha256_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |
| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |
| InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL |
| INNODB_TRX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCKS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCK_WAITS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_PER_INDEX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_PER_INDEX_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_PAGE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_PAGE_LRU | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_POOL_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_METRICS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_DEFAULT_STOPWORD | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_BEING_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_CONFIG | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_INDEX_CACHE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_INDEX_TABLE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLESTATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_INDEXES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_COLUMNS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FIELDS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FOREIGN | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FOREIGN_COLS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLESPACES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_DATAFILES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| PERFORMANCE_SCHEMA | ACTIVE | STORAGE ENGINE | NULL | GPL |
| BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| FEDERATED | DISABLED | STORAGE ENGINE | NULL | GPL |
| ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| partition | ACTIVE | STORAGE ENGINE | NULL | GPL |
+----------------------------+----------+--------------------+---------+---------+
2.2 查看从库的半同步插件
$ ls -lh /usr/local/mysql/lib/plugin/semisync_slave.so
-rwxr-x--- mysqladmin dba 245K Jan /usr/local/mysql/lib/plugin/semisync_slave.so
2.3 安装从库的半同步插件
mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';
Query OK, 0 rows affected (0.02 sec) mysql> set global rpl_semi_sync_slave_enabled = 1;
Query OK, 0 rows affected (0.00 sec)
2.4 查看从库安装好半同步插件的状态
mysql> show status like '%semi%';
+----------------------------+-------+
| Variable_name | Value |
+----------------------------+-------+
| Rpl_semi_sync_slave_status | OFF |
+----------------------------+-------+
1 row in set (0.00 sec) mysql> show variables like '%semi%';
+---------------------------------+-------+
| Variable_name | Value |
+---------------------------------+-------+
| rpl_semi_sync_slave_enabled | ON |
| rpl_semi_sync_slave_trace_level | 32 |
+---------------------------------+-------+
2 rows in set (0.02 sec) mysql> show plugins;
+----------------------------+----------+--------------------+-------------------+---------+
| Name | Status | Type | Library | License |
+----------------------------+----------+--------------------+-------------------+---------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |
| mysql_native_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| mysql_old_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| sha256_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |
| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |
| InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL |
| INNODB_TRX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCKS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCK_WAITS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_PER_INDEX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_PER_INDEX_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_PAGE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_PAGE_LRU | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_POOL_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_METRICS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_DEFAULT_STOPWORD | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_BEING_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_CONFIG | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_INDEX_CACHE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_FT_INDEX_TABLE | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLESTATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_INDEXES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_COLUMNS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FIELDS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FOREIGN | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_FOREIGN_COLS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLESPACES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_DATAFILES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| PERFORMANCE_SCHEMA | ACTIVE | STORAGE ENGINE | NULL | GPL |
| BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| FEDERATED | DISABLED | STORAGE ENGINE | NULL | GPL |
| ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| partition | ACTIVE | STORAGE ENGINE | NULL | GPL |
| rpl_semi_sync_slave | ACTIVE | REPLICATION | semisync_slave.so | GPL |
+----------------------------+----------+--------------------+-------------------+---------+
2.5 重启slave复制线程
mysql> stop slave;
Query OK, 0 rows affected (0.06 sec) mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
2.6 再次查看半同步状态
mysql> show status like '%semi%';
+----------------------------+-------+
| Variable_name | Value |
+----------------------------+-------+
| Rpl_semi_sync_slave_status | ON |
+----------------------------+-------+
2.7 将半同步配置写到配置文件
$ grep rpl_semi_sync /etc/my.cnf
rpl_semi_sync_slave_enabled=
MySQL5.6复制技术(2)-主从部署以及半同步配置详细过程的更多相关文章
- Centos7.5部署MySQL5.7基于GTID主从复制+并行复制+半同步复制+读写分离(ProxySQL) 环境- 运维笔记 (完整版)
之前已经详细介绍了Mysql基于GTID主从复制的概念,原理和配置,下面整体记录下MySQL5.7基于GTID主从复制+并行复制+增强半同步复制+读写分离环境的实现过程,以便加深对mysql新特性GT ...
- Redis主从配置详细过程
Redis的主从复制功能非常强大,一个master可以拥有多个slave,而一个slave又可以拥有多个slave,如此下去,形成了强大的多级服务器集群架构.下面楼主简单的进行一下配置. 1.上面安装 ...
- MySQL-技术专题-MySQL主从架构以及[半同步机制]模式大全
MySQL的主从复制 一般在大规模的项目上,都是使用MySQL的复制功能来创建MySQL的主从集群的. 主要是可以通过为数据库服务器配置一个或多个备库的方式来进行数据同步. 复制的功能不仅有利于构建高 ...
- MySQL主从同步和半同步配置
mysql主从配置: 1,安装maraidb,使用国内yum镜像站下载:[root@localhost mysql]# cat /etc/yum.repos.d/MairaDB.repo # Mari ...
- MySQL主从复制原理及配置详细过程以及主从复制集群自动化部署的实现
一.复制概述 Mysql内建的复制功能是构建大型,高性能应用程序的基础.将Mysql的数据分布到多个系统上去,这种分布的机制,是通过将Mysql的某一台主机的数据复制到其它主机(slaves)上,并重 ...
- yum部署、使用 zabbix监控 - 详细过程
yum部署zabbix监控 第1章 yum部署zabbix服务端... 1 1.1 命令行部署... 1 1.1.1 yum源配置-解释... 2 1.1.2 MariaDB 与 mysql 3 1. ...
- mysql半同步(semi-sync)源码实现
mysql复制简单介绍了mysql semi-sync的出现的原因,并说明了semi-sync如何保证不丢数据.这篇文章主要侧重于semi-sync的实现,结合源码将semi-sync的实现过程展现给 ...
- Mysql半同步复制模式说明及配置示例 - 运维小结
MySQL主从复制包括异步模式.半同步模式.GTID模式以及多源复制模式,默认是异步模式 (如之前详细介绍的mysql主从复制).所谓异步模式指的是MySQL 主服务器上I/O thread 线程将二 ...
- Mysql的ssl主从复制+半同步主从复制
Mysql的ssl主从复制+半同步主从复制 准备工作 1.主从服务器时间同步 [root@localhost ~]# crontab -e */30 * * * * /usr/sbin/ntpdate ...
随机推荐
- DPDK安装方法 17.12.13
DPDK安装方法 17.12.13 Ubuntu: $ git clone https://github.com/DPDK/dpdk.git $ cd dpdk/ $ export RTE_ARCH= ...
- 《算法竞赛入门经典》刘汝佳 C语言部分（前四章）“注解与习题” 之思索 -<1>
此书我购于去年的十一月份,也是经前人推荐购买的一本比较有用的书籍,在寒假自学此书,其简洁清晰高效的示例代码令我印象深刻,于是我打算把这本书的前四章后面的注解与习题(未给出标准解答)认真的去思索和研究, ...
- HDU 1247 Hat’s Words（字典树）
http://acm.hdu.edu.cn/showproblem.php?pid=1247 题意: 给出一些单词,问哪些单词可以正好由其他的两个单词首尾相连而成. 思路: 先将所有单独插入字典树,然 ...
- 集成算法——Ensemble learning
目的:让机器学习效果更好,单个不行,群殴啊! Bagging:训练多个分类器取平均 Boosting:从弱学习器开始加强,通过加权来进行训练 (加入一棵树,比原来要强) Stacking:聚合多个分类 ...
- Oracle分页查询排序数据重复问题
参考资料: http://docs.oracle.com/database/122/SQLRF/ROWNUM-Pseudocolumn.htm#SQLRF00255 http://blog.csdn. ...
- hdu 2034 改革春风吹满地 多边形面积
改革春风吹满地 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Problem ...
- activity 运行流程图
- java 之2D过气游戏类的写法
2D游戏中各对象的父类 package cn.littlepage.game; import java.awt.Graphics; import java.awt.Image; import java ...
- 力扣（LeetCode）219. 存在重复元素 II
给定一个整数数组和一个整数 k,判断数组中是否存在两个不同的索引 i 和 j,使得 nums [i] = nums [j],并且 i 和 j 的差的绝对值最大为 k. 示例 1: 输入: nums = ...
- QT5 解决QSqlDatabase: QMYSQL driver not loaded 问题
QT版本 Qt 5.12.0 MySQL版本 8.0.13 转到MySQL的安装目录 G:\mysql-8.0.13-winx64\mysql-8.0.13-winx64\lib 将安装目录下的两个文 ...