Effective MySQL Replication Techniques in Depth
Ronald Bradford
Language: English
Pages: 296
ISBN: 0071791868
Format: PDF / Kindle (mobi) / ePub
The Essential Guide to Scaling Your Business Solution
Written by Oracle ACE Director and MySQL expert Ronald Bradford, with coauthor Chris Schneider, Effective MySQL: Replication Techniques in Depth describes what is needed to understand and implement MySQL replication to build scalable solutions. This book includes detailed syntax examples to demonstrate the features, options, and limitations of native MySQL replication. Providing an evaluation of various new replication features and additional third-party product implementations, this Oracle Press guide helps to ensure your MySQL environment can support the various high-availability needs of your business.
- Master the strengths and limitations of native asynchronous replication in a MySQL topology
- Identify the important features to improve replication for growing business requirements
- Recognize the key business factors to determine your optimal highavailability needs
- Understand the benefits of using MySQL replication for failover scenarios
- Identify the key configuration variables and SQL commands affecting master/ slave replication
- Learn about the advancements in replication techniques provided by new products, including Tungsten Replicator and Galera
- Optimize your replication management with various utilities and toolkits
Find additional detailed information and presentations at EffectiveMySQL.com.
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Depth / Bradford / 186-8 Diagnosing Common Replication Problems 29 master> SHOW GLOBAL STATUS LIKE 'Com_alter%'; +------------------------+-------+ | Variable_name | Value | +------------------------+-------+ | Com_alter_db | 0 | | Com_alter_db_upgrade | 0 | | Com_alter_event | 0 | | Com_alter_function | 0 | | Com_alter_procedure | 0 | | Com_alter_server | 0 | | Com_alter_table | 1 | | Com_alter_tablespace | 0 | | Com_change_master | 0 | | Com_show_master_status | 3 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 Monitoring Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234 Dedicated Monitoring Products . . . . . . . . . . . . . . . . . . . . . . . 235 System Monitoring Products . . . . . . . . . . . . . . . . . . . . . . . . . 235 The Implementation of Monitoring . . . . . .
status of global transaction identifier (GTID) variables to ensure these are correctly configured for the defined masters and slaves. This command also displays UUID information for all specified servers. • elect Perform a best slave election and report which slave to use for switchover. • switchover Perform a slave promotion of an elected slave to master and reconfigure the existing master as a slave. • failover Conduct a failover from an unavailable master to the best available slave.
--output_file=/home/user/mha/log/save_binary_logs_test --manager_version=0.53 --start_file=mysql-bin.000005 [info] Connecting to user@alpha(alpha).. Creating /home/user/mha/log if not exists.. ok. Checking output directory is accessible or not.. ok. Binlog found at /home/user/mysql/data, up to mysql-bin.000005 [info] Master setting check done. [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers.. [info] Executing command :
MASTER_USER='repl', MASTER_PASSWORD='xxx'; [info] Setting read_only=0 on beta(192.168.1.52:3306).. [info] ok. [info] * Switching slaves in parallel.. [info] Unlocking all tables on the orig master: [info] Executing UNLOCK TABLES.. [info] ok. [info] Starting orig master as a new slave.. [info] Resetting slave alpha(192.168.1.51:3306) and starting replication from the new master beta(192.168.1.52:3306).. [info] Executed CHANGE MASTER. [info] Slave started. [info] All new slave servers switched
