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Recover orphaned InnoDB partition tablespaces in MySQL

 | October 14, 2014 |  Posted In: InnoDB, MySQL

A few months back, Michael wrote about reconnecting orphaned *.ibd files using MySQL 5.6. I will show you the same procedure, this time for partitioned tables. An InnoDB partition is also a self-contained tablespace in itself so you can use the same method described in the previous post. To begin with, I have an example […]

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Syncing MySQL slave table with pt-online-schema-change

 | September 17, 2014 |  Posted In: Insight for DBAs, MySQL, Percona Toolkit

I recently encountered a situation in which after running Percona Toolkit’s pt-table-checksum on a customer system, 95% of the table on the MySQL master was different on the MySQL slave. Although this table was not a critical part of the infrastructure, from time to time, writes to the table from the master would break replication. […]

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High Availability with mysqlnd_ms on Percona XtraDB Cluster

 | July 16, 2014 |  Posted In: High-availability, Insight for Developers, MySQL, Percona XtraDB Cluster

This is the second part of my series on High Availability with mysqlnd_ms. In my first post, “Simple MySQL Master HA with mysqlnd_ms,” I showed a simple HA solution using asynchronous MySQL replication. This time we will see how to leverage an all-primary cluster where you can write to all nodes. In this post I used […]

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Simple MySQL Master HA with mysqlnd_ms

 | July 14, 2014 |  Posted In: Insight for Developers, MySQL

I had the pleasure of presenting to the PHP Users Group Philippines a few days ago about mysqlnd_ms. The mysqlnd plugin, MySQL Master Slave, is a transparent layer on top of mysqlnd extension. This allows you to do read-write splitting and slave reads load balancing without needing to change anything from your application. But do […]

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Encrypted and incremental MySQL backups with Percona XtraBackup

 | April 24, 2014 |  Posted In: MySQL, Percona MySQL Consulting, Percona MySQL Support, Percona Software, Percona XtraBackup

We’ve recently received a number of questions on how to implement incremental MySQL backups alongside encryption with Percona XtraBackup. Some users thought it was not initially possible because with the default --encrypt options with XtraBackup, all files will be encrypted, but alas, that is not the case. This is where the option --extra-lsn-dir becomes useful, […]

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Another reason why SQL_SLAVE_SKIP_COUNTER is bad in MySQL

 | July 23, 2013 |  Posted In: MySQL

It is everywhere in the world of MySQL that if your replication is broken because an event caused a duplicate key or a row was not found and it cannot be updated or deleted, then you can use ‘ STOP SLAVE; SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1; START SLAVE; ‘ and be done with it. In some cases this is fine and you can repair the […]

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