1. Zero downtime upgrade
Maksim Melnikau (max posedon)
Linux Mobile hobbyist
World of Tanks developer
February 16, 2013

2. The Problem

3. The First

4. Multiple instances

5. Live upgrade

6. Conclusion
automate everything what you can
test new version in production environment
use read-only mode, for dramatic updates

7. Questions and Answers
Maksim Melnikau (max posedon)
email: m melnikau@wargaming.net