重點：配置GNR時需要所有的GNR以[ MySQLd xxx]的格式命名，否則會報找到GNR的錯誤

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準備Mysqld_multi配置文件加入多實例的配置信息

指定GNR啟動實例(不要指定MYSQLD這個關鍵詞)

mysqld_multi start 3308

指定端口和SOCK文件關閉實例

mysqladmin -uroot -p123456 -P3307 -S/mydata/data2/mysql.sock shutdown

指定連接實例

mysql -uroot -p123456 -S/mydata/data2/mysql.sock

指定啟動實例

mysqld_multi start mysqld3307

如下為多實例的配置文件

[client]

#socket = /mydata/data/mysql.sock

[mysqld_multi]

log=/mydata/mysqld_multi.log

#mysqld=/usr/sbin/mysqld

user=mysql

#basedir = /usr

#sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

[mysqld3306]

########basic settings########

user=mysql

server-id = 333

port = 3306

socket=/mydata/data/master1.sock

#skip-grant-tables

character_set_server=utf8

skip_name_resolve = 1

max_connections = 2000

max_connect_errors = 1000

datadir = /mydata/data

explicit_defaults_for_timestamp = 1

join_buffer_size = 134217728

tmp_table_size = 67108864

tmpdir = /tmp

lower_case_table_names=1

log_error = error.log

########replication settings########

master_info_repository = TABLE

relay_log_info_repository = TABLE

log_bin = bin.log

gtid_mode = on

enforce_gtid_consistency = 1

log_slave_updates

binlog_format = row

relay_log = relay.log

relay_log_recovery = 1

#binlog_gtid_simple_recovery = 1

slave_skip_errors = ddl_exist_errors

########innodb settings########

innodb_buffer_pool_size = 1G

innodb_buffer_pool_instances = 8

innodb_lock_wait_timeout = 50

innodb_log_file_size = 500M

innodb_purge_threads = 4

innodb_large_prefix = 1

innodb_thread_concurrency = 64

innodb_print_all_deadlocks = 1

innodb_strict_mode = 1

innodb_sort_buffer_size = 67108864

########semi sync replication settings########

#plugin_dir=/usr/local/mysql/lib/plugin

#plugin_load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"

loose_rpl_semi_sync_master_enabled = 1

loose_rpl_semi_sync_slave_enabled = 1

loose_rpl_semi_sync_master_timeout = 5000

[mysqld3307]

########basic settings########

user=mysql

server-id = 789

port = 3307

skip-grant-tables

socket=/mydata/data2/master2.sock

character_set_server=utf8

skip_name_resolve = 1

max_connections = 2000

max_connect_errors = 1000

datadir = /mydata/data2

explicit_defaults_for_timestamp = 1

join_buffer_size = 134217728

tmp_table_size = 67108864

tmpdir = /tmp

lower_case_table_names=1

log_error = error.log

########replication settings########

master_info_repository = TABLE

relay_log_info_repository = TABLE

log_bin = bin.log

gtid_mode = on

enforce_gtid_consistency = 1

log_slave_updates

binlog_format = row

relay_log = relay.log

relay_log_recovery = 1

#binlog_gtid_simple_recovery = 1

slave_skip_errors = ddl_exist_errors

########innodb settings########

innodb_buffer_pool_size = 1G

innodb_buffer_pool_instances = 8

innodb_lock_wait_timeout = 50

innodb_log_file_size = 500M

innodb_purge_threads = 4

innodb_large_prefix = 1

innodb_thread_concurrency = 64

innodb_print_all_deadlocks = 1

innodb_strict_mode = 1

innodb_sort_buffer_size = 67108864

########semi sync replication settings########

#plugin_dir=/usr/local/mysql/lib/plugin

#plugin_load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"

loose_rpl_semi_sync_master_enabled = 1

loose_rpl_semi_sync_slave_enabled = 1

loose_rpl_semi_sync_master_timeout = 5000

文章題目：MYSQL多實例安裝以及常見運維點
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