MySQL - No IO (Pronounced: mysql no-yo)

Executing export and maintenance commands which require you hold a connection to MySQL. The best use case example is running FLUSH TABLES WITH READ LOCK in one terminal while running an lvm snapshot in another.

Project State

Master Unit Tests: Build Status

Master Code Quality: Code Climate

Develop Unit Tests: Build Status

Beta, Basic functionality exists and it is being used in production for providing database dumps and backups.


The idea is similar to sudo: you pass a variety of options, and then the command you want to run afterward.


mysql-noio -uroot -pfoobar --stop-slave --lock-tables -- ./
mysql -uroot -pfoobar -e "show slave status\G"
lvcreate -L20G -s -n mysqlsnap /dev/VG_MySQL/LV_MySQL


  • Ruby 1.9.3 (Ubuntu 12.04 installs this with the ruby1.9.1 package) or 2.0.0
  • The mysql2 gem, which also requires local mysql client libraries, and headers.


gem install mysqlnoio


  • 2013-04-23 - First release (0.1.0).
  • 2013-04-23 - Fixed an issue where calling it with no parameters caused a stack trace.
  • 2013-04-23 - Created more extensive integration tests asserting the slave stop feature works as intended.
  • 2013-04-23 - Release: 0.1.1
  • 2013-04-25 - Client now pings the server every one second to prevent client timeouts during long-running subprocesses.
mysqlnoio - For executing commands with a stopped slave.
Copyright (C) 2013  ZippyKid

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