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RDS Migration from 5.5 to 5.6 with mysqldump

Amazon recently announced support for 5.6, unfortunately, direct upgrade from lower versions is not yet supported. On a recent migration work – running mysqldump flat out would’ve meant 6+hrs of downtime. How did we cut it off to 1h45m? Simple, run dump per table and pipe it directly to the new 5.6 instance in parallel using Percona Server’s mysqldump utility to take advantage of –innodb-optimize-keys.

Here’s the base script we used – of course, YMMV and make sure to optimize the destination instance as well!

After splitting the jobs into n files, you then fork processes using the script below to do the actual work.

And as bonus, here is how you can monitor for progress:

This is exactly how we want mysqldump to be Morgan! 🙂