Exercises
- Explain the pets and cattle analogy for computers. 
- What is a snowflake server? Why are they a bad idea? 
- If a snowflake server is risky, how can we reduce risk through repetition? 
- How do cattle-like systems help us be more efficient? 
- How do cattle-like systems help us scale services? 
- According to this chapter, why do banks have lousy interest rates? 
- A laptop and a desktop PC are very different. In what way could we treat them both as cattle of the same herd? 
- What is state? What is irreproducible state? 
- Why is isolating state to particular machines a good thing? 
- How can beta and production environments end up being different? How can we make them as similar as possible? 
- How is mass-production aided by moving variations to the end? 
- Sometimes bad customer service is described as being treated like cattle. Yet, some of the best companies have practices that assure that everyone receives extremely high-quality service in an efficient and mass-produced way. These companies are also managing people like cattle. How are the latter companies able to achieve this without offending their customers? 
- Pick a service in your organization that stores a lot of state. Describe how it could be implemented using an architecture that isolates state. 
- What are the benefits of moving variations to the end of the process? 
- Pick a process in your organization that has a lot of variation. How can it be restructured to move the variation to the end? What benefits would be achieved by doing this? 
