feat: mysql replica documentation improvement

docs/linux/mysql-replication.md

@@ -14,12 +14,22 @@ MariaDB:
 
 ```shell
 [mysqld]
+
+# server identification
 server-id = 1
+
+# network
+bind-address = 0.0.0.0
+
+# gtid configuration
+gtid_strict_mode = 1
+
+# binary logging
 log-bin = /var/log/mysql/mysql-bin.log
 binlog-format = ROW
 binlog-do-db = databeast
-bind-address = 0.0.0.0
+
-gtid_strict_mode = 1
+# replication configuration
 log_slave_updates = 1
 ```
 
@@ -27,13 +37,24 @@ MySQL:
 
 ```shell
 [mysqld]
+
+# server identification
 server-id = 1
-log_bin = /var/lib/mysql/mysql-bin.log
+
-binlog_format = ROW
+# network
-binlog-expire-logs-seconds = 172800
+bind-address = 0.0.0.0
-max_binlog_size = 100M
+
+# gtid configuration
 gtid_mode = ON
 enforce_gtid_consistency = ON
+
+# binary logging
+log_bin = /var/lib/mysql/mysql-bin.log
+binlog_format = ROW
+max_binlog_size = 100M
+binlog-expire-logs-seconds = 172800
+
+# replication configuration
 log_slave_updates = 1
 ```
 
@@ -58,13 +79,13 @@ FLUSH PRIVILEGES;
 MariaDB:
 
 ```shell
-mariadb-dump -u root -psupersecuresource --single-transaction --gtid --master-data=1 --databases databeast > /tmp/databeast.sql
+mariadb-dump -u root -psupersecuresource --single-transaction --gtid --databases databeast > /tmp/databeast.sql
 ```
 
 MySQL:
 
 ```shell
-mysqldump -u root -psupersecuresource --single-transaction --set-gtid-purged=ON --source-data=1 --databases databeast > /tmp/databeast.sql
+mysqldump -u root -psupersecuresource --single-transaction --set-gtid-purged=ON --source-data=2 --databases databeast > /tmp/databeast.sql
 ```
 
 ## Configure replicate
@@ -79,33 +100,64 @@ MariaDB:
 
 ```shell
 [mysqld]
+
+# server identification
 server-id = 2
-read-only = 1
+
-relay-log = /var/log/mysql/mysql-relay-bin
+# network
+bind-address = 0.0.0.0
+
+# gtid configuration
+gtid_strict_mode = 1
+
+# binary logging
 log-bin = /var/log/mysql/mysql-bin.log
 binlog-format = ROW
-bind-address = 0.0.0.0
+
-gtid_strict_mode = 1
+# replication configuration
 log_slave_updates = 1
+relay-log = /var/log/mysql/mysql-relay-bin
+
+# parallel replication
+slave_parallel_mode = optimistic
+slave_parallel_threads = 2
+
+# read-only replica
+read-only = 1
 ```
 
 MySQL:
 
 ```shell
 [mysqld]
+
+# server identification
 server-id = 2
-relay_log = /var/lib/mysql/mysql-relay-bin
+
-read_only = 1
+# network
-replicate-do-db = databeast
+bind-address = 0.0.0.0
-log_bin = /var/lib/mysql/mysql-bin.log
+
-binlog_format = ROW
+# gtid configuration
-binlog-expire-logs-seconds = 172800
-max_binlog_size = 100M
 gtid_mode = ON
 enforce_gtid_consistency = ON
+
+# binary logging
+log_bin = /var/lib/mysql/mysql-bin.log
+binlog_format = ROW
+max_binlog_size = 100M
+binlog-expire-logs-seconds = 172800
+
+# replication configuration
 log_slave_updates = 1
-slave_parallel_type = 'LOGICAL_CLOCK'
+relay_log = /var/lib/mysql/mysql-relay-bin
+replicate-do-db = databeast
+
+# parallel replication
+slave_parallel_type = LOGICAL_CLOCK
 slave_parallel_workers = 2
+
+# read-only replica
+read_only = 1
 ```
 
 Restart mariadb: `systemctl restart mariadb`  
@@ -187,7 +239,7 @@ mysql -u root -p
 ```
 
 ```shell
-SHOW REPLICA STATUS\G
+SHOW SLAVE STATUS\G
 *************************** 1. row ***************************
                 Slave_IO_State: Waiting for master to send event
                    Master_Host: source.example.com