Cara menggunakan mysql query_cache_size

Untuk dapat mencoba melakukan replikasi master to master mysql ini, silakan persiapkan (minimal) 2 server mysql siap pakai, contoh dengan IP 10.2.9.1 dan 10.2.9.2.

Langkah Replikasi Master to Master MySQL

1. Sesuaikan konfigurasi masing-masing server MySQL sebagai master. Ubah pada tiap file /etc/my.cnf.
Untuk master server 1 misalnya:

[mysqld] port=3306 datadir=/home/mysql/ socket=/usr/local/mysql/tmp/mysql.sock user=mysql old_passwords=0 #symbolic-links=0 #query_cache_size = 268435456 query_cache_size = 256M query_cache_type=1 query_cache_limit = 1048576 log = 1 long_query_time = 1 slow_query_log = 1 slow_query_log_file = /var/log/mysql/mysql-slow.log general_log = 1 general_log_file = /var/log/mysqld.log server_id = 1 log_bin = /var/log/mysql/mysql-bin.log log_bin_index = /var/log/mysql/mysql-bin.log.index relay_log = /var/log/mysql/mysql-relay-bin relay_log_index = /var/log/mysql/mysql-relay-bin.index expire_logs_days = 10 max_binlog_size = 100M log_slave_updates = 1 bind-address = 0.0.0.0 local-infile = 0

sedangkan untuk server master 2:

[mysqld] port=3306 datadir=/home/mysql socket=/usr/local/mysql/tmp/mysql.sock user=mysql old_passwords=0 #symbolic-links=0 query_cache_size = 268435456 query_cache_type=1 query_cache_limit=1048576 log = 1 long_query_time = 1 slow_query_log = 1 slow_query_log_file = /var/log/mysql/mysql-slow.log general_log = 1 general_log_file = /var/log/mysqld.log server_id = 2 log_bin = /var/log/mysql/mysql-bin.log log_bin_index = /var/log/mysql/mysql-bin.log.index relay_log = /var/log/mysql/mysql-relay-bin relay_log_index = /var/log/mysql/mysql-relay-bin.index expire_logs_days = 10 max_binlog_size = 100M log_slave_updates = 1 bind-address = 0.0.0.0 local-infile = 0

2. Instal replikasi ke masing-masing server, login ke server1 sebagai root.
a. buatlah 3 user untuk keperluan replikasi ini: mysqlchkuser, mmm_monitor, mmm_agent, dan replication.
b. Grant mmm_monitor sebagai client replication.
c. Grant mmm_agent sebagai super dan client replication.
d. Grant replication sebagai slave
e. flush privileges mysql
f. flush juga read lock mysql
g. cek status master mysql
gambaran langkah-langkah diatas dalam perintah dan respon di console seperti berikut:

mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 36 Server version: 5.5.12-log Source distribution Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement mysql> create user 'mysqlchkuser'@'localhost' identified by 'mysql321'; Query OK, 0 rows affected (0.06 sec) mysql> create user 'mmm_monitor'@'%' identified by 'monitor_password'; Query OK, 0 rows affected (0.06 sec) mysql> create user 'mmm_agent'@'%' identified by 'agent_password'; Query OK, 0 rows affected (0.00 sec) mysql> create user 'replication'@'%' identified by 'replication_password'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'%' IDENTIFIED BY 'monitor_password'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'%' IDENTIFIED BY 'agent_password'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT REPLICATION SLAVE ON *.* TO 'replication'@'%' IDENTIFIED BY 'replication_password'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.01 sec) mysql> flush tables with read lock; Query OK, 0 rows affected (0.00 sec) mysql> show master status; +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000001 | 1044 | | | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec)

h. Dump database master server 1 ke master server 2 dengan mysqldump

mysqldump -u root -p --all-databases > /tmp/database-backup.sql

i. Pindah file backup ke master server 2 dengan scp,

scp /tmp/database-backup.sql 10.2.9.2:~/

j. Unlock table di master 1.
3. Login ke master server 2 sebagai root di mysql.
a. flush privileges yang ada.
b. ubah master mysql dengan master_host = ‘10.2.9.1’ (atau sesuai IP master server 1 anda) berikut dengan port (biasanya 3306), master user (dalam hal ini ‘replication’), password user dan log file mastering nya.

mysql> flush privileges; Query OK, 0 rows affected (0.46 sec) mysql> CHANGE MASTER TO master_host='10.2.9.1', master_port=3306, master_user='replication', -> master_password='replication_password', master_log_file='mysql-bin.000001', master_log_pos=1044;

c. jalankan slave pada master server 2 dan cek status slave-nya.

mysql> start slave; Query OK, 0 rows affected (0.00 sec) mysql> show slave status \G run command *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.2.9.1 Master_User: replication Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000001 Read_Master_Log_Pos: 1044 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 253 Relay_Master_Log_File: mysql-bin.000001 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: 1044 Relay_Log_Space: 409 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 1 row in set (0.00 sec)

d. cek plu status master-nya

mysql> show master status -> ; +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000002 | 27957968 | | | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec) mysql> show master status; +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000002 | 27957968 | | | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec)

4. Kembali ke master server 1 dan setting master
a. Ubah master mysql dengan master host sesuai IP master server 2, sesuaikan port, user, password dan file log-nya.

mysql> CHANGE MASTER TO master_host='10.2.9.2', master_port=3306, master_user='replication', -> master_password='replication_password', master_log_file='mysql-bin.000002', master_log_pos=27957968; Query OK, 0 rows affected (0.34 sec)

b. jalankan slave dan cek statusnya

mysql> start slave; Query OK, 0 rows affected (0.00 sec) mysql> show slave status\G run command *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.2.9.1 Master_User: replication Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 27957968 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 253 Relay_Master_Log_File: mysql-bin.000002 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: 27957968 Relay_Log_Space: 409 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: 2 1 row in set (0.00 sec)

5. Uji coba replikasi.
a. Pada console master server 1, silakan lihat daftar database
b. Cobalah buat sebuah database baru

[mysqld] port=3306 datadir=/home/mysql socket=/usr/local/mysql/tmp/mysql.sock user=mysql old_passwords=0 #symbolic-links=0 query_cache_size = 268435456 query_cache_type=1 query_cache_limit=1048576 log = 1 long_query_time = 1 slow_query_log = 1 slow_query_log_file = /var/log/mysql/mysql-slow.log general_log = 1 general_log_file = /var/log/mysqld.log server_id = 2 log_bin = /var/log/mysql/mysql-bin.log log_bin_index = /var/log/mysql/mysql-bin.log.index relay_log = /var/log/mysql/mysql-relay-bin relay_log_index = /var/log/mysql/mysql-relay-bin.index expire_logs_days = 10 max_binlog_size = 100M log_slave_updates = 1 bind-address = 0.0.0.0 local-infile = 0 0

c. Coba cek di master server 2, harusnya database contohreplikasi otomatis juga dibuatkan.

[mysqld] port=3306 datadir=/home/mysql socket=/usr/local/mysql/tmp/mysql.sock user=mysql old_passwords=0 #symbolic-links=0 query_cache_size = 268435456 query_cache_type=1 query_cache_limit=1048576 log = 1 long_query_time = 1 slow_query_log = 1 slow_query_log_file = /var/log/mysql/mysql-slow.log general_log = 1 general_log_file = /var/log/mysqld.log server_id = 2 log_bin = /var/log/mysql/mysql-bin.log log_bin_index = /var/log/mysql/mysql-bin.log.index relay_log = /var/log/mysql/mysql-relay-bin relay_log_index = /var/log/mysql/mysql-relay-bin.index expire_logs_days = 10 max_binlog_size = 100M log_slave_updates = 1 bind-address = 0.0.0.0 local-infile = 0 1

Sekian. Semoga berhasil dan selamat menikmati replikasi data master to master MySQL.
Referensi:
1. emka.web.id (//emka.web.id/programming/database/mysql/2012/replikasi-master-to-master-mysql/)
2. MySQL-mmm.org (//mysql-mmm.org/mmm2:guide)
3. ALinux.web.id (//alinux.web.id/2011/08/16/replicate-master-to-master-mysql.html)

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