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mysql> stop slave;
Query OK, 0 rows affected (0.00 sec)

mysql> set global sql_slave_skip_counter=2;
Query OK, 0 rows affected (0.00 sec)

START SLAVE;

SHOW SLAVE STATUS \G;

 

如果Slave DB出現以下情況。

Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's relay log is corrupted (you can check this by running 'mysqlbinlog' on the relay log), a network problem, or a bug in the master's or slave's MySQL code. If you want to check the master's binary log or slave's relay log, you will be able to know their names by issuing 'SHOW SLAVE STATUS' on this slave.

先記住Master_Log_File,Exec_Master_Log_Pos

stop slave;

CHANGE MASTER TO MASTER_HOST='{SERVERIP}', MASTER_PORT={PORT}, MASTER_USER='{USER}', MASTER_PASSWORD='{PASSWORD}' ,  master_log_file='mysql-bin.000002' , master_log_pos=326554769 ;
Query OK, 0 rows affected (0.07 sec)

START SLAVE;

SHOW SLAVE STATUS \G;

 

~ Completely remove mariadb ~

connie 2017.04.05 | centos, mariadb | | No Comments
yum remove mariadb mariadb-server

rm -rf /var/lib/mysql 

rm /etc/my.cnf

Optional step: rm ~/.my.cnf

 

~ 變更group concat最大長度的限制 ~

connie 2017.03.26 | mariadb, mysql | | No Comments
預設1024 data lenght 

nano my.cnf

[mysqld]

group_concat_max_len=200000

 

Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT. The statement is unsafe because it uses a LIMIT clause. This is unsafe because the set of rows included cannot be predicted.  

[master]
nano my.cnf
binlog_format = mixed
/etc/init.d/mysql restart

[slave]
nano my.cnf
binlog_format = mixed
/etc/init.d/mysql restart

show variables like "binlog_format";

 

mysqladmin -u root -p var | grep -E 'character|collation' | tr -s ' '
| character_set_client | latin1 |
| character_set_connection | latin1 |
| character_set_database | latin1 |
| character_set_filesystem | binary |
| character_set_results | latin1 |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
| collation_connection | latin1_swedish_ci |
| collation_database | latin1_swedish_ci |
| collation_server | latin1_swedish_ci |
nano  /etc/my.cnf
[mysqld]
...
...
character-set-server=utf8
systemctl stop mariadb
systemctl start mariadb
mysqladmin -u root -p var | grep -E 'character|collation' | tr -s ' '
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
| collation_connection | utf8_general_ci |
| collation_database | utf8_general_ci |
| collation_server | utf8_general_ci |

 

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