Posts from — November 2014

Nasty MySQL Replication Bugs that Affect Upgrade to 5.6

There were two nasty MySQL replication bugs in two different 5.6 releases that would make it difficult to upgrade slaves to MySQL 5.6 while still connected to MySQL 5.5 master. The first of those bugs is MySQL bug 72610 which affects 5.6.19. Essentially this bug is triggered when the table structure on the slave is different from the table structure on the master which leads to unnecessarily large amount of RAM usage while replicating events that affect that table. The amount of RAM used would generally be more noticeable when the replicated transaction consists of thousands of RBR events. The…

November 25, 2014   Views: 2,845   2 Comments

Speedup Test Kitchen Vagrant Infrastructure Code Testing

Test Kitchen together with Vagrant is a wonderful way to test out your infrastructure deployment and orchestration code. It makes test-driven development especially easy by allowing you to test locally using virtual machines. However, those of you who do a lot of testing with Test Kitchen and Vagrant would know that waiting for tests to complete can be painfully long.

November 15, 2014   Views: 3,434   No Comments