5 ms·
Said another way: - You have a system whereby every instance has a 75%-79% uptime. - Each instance's 21%-25% daily scheduled maintenance window can (gener
by oh-4-fucks-sake 6y ago
Said another way:
- You have a system whereby every instance has a 75%-79% uptime.
- Each instance's 21%-25% daily scheduled maintenance window can (generally) be arbitrarily-scheduled by the ops team.
How do you near guarantee that there's always one instance available?
If you said:
"manage a redundant cluster of at least 2 instances with non-overlapping maintenance windows"
Then you were correct!
BONUS QUESTIONS:
Q: What's the max number of ice cream machines found in a McDonald's location?
Q: What's the cluster size of the McDonald's ice cream monitoring system?
Q: How much money does McDonald's have?
Q: Why the fuck?
If you said: "1", "at least 3", "metric fuck-tons", and "I don't know", respectively, then you were correct!
- throwaway373438 6y agoThe answer to #4 is probably that the goal isn't to always have ice cream. The goal is to run a profitable business. Doubling the cost of the ice cream infrastructure to avoid a 25% downtime may not be a profitable venture -- especially if the downtime is scheduled to occur while the store is closed.
- dmix 6y agoShelf-space is in high-demand and those machines aren't cheap.
- newforms 6y agoMcDonalds is in the real estate business (letting buildings), fast food is just a side order.
- justinclift 6y agoAren't the stores franchise's, with the individual stores owned by the relevant franchisee?
- maxerickson 6y agoThe operations are mostly franchised, but the corp owns many of the buildings and plots of lands that they are located on. https://www.mcdonalds.com/us/en-us/about-us/franchising/real-estate.html https://www.mcdonalds.com/us/en-us/about-us/franchising/real...
- peterwoerner 6y agoAlso, you can use data to schedule the maintenance when the probability of someone ordering ice cream is low. That 21-25% downtime results in significantly fewer people wanting ice cream not being able to get it.