http://www.dodgycoder.net/2012/04/scalability-lessons-from-google-youtube.html
- Keep it simple – complexity will come naturally over time.
- Automate everything, including failure recovery.
- Iterate your solutions – be prepared to throw away a working component when you want to scale it up to the next level.
- Use the right tool for the job, but don’t be afraid to roll your own solution.
- Use caching, where appropriate.
- Know when to favor data consistency over data availability, and vice versa.
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