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Facebook can completely break the user experience for 4.3 million different users each day and each user would only experience one breakage per year. This is p
by Rapzid 5y ago
Facebook can completely break the user experience for 4.3 million different users each day and each user would only experience one breakage per year.
This is pretty common, but not because most employing it have 1.6bn users and 10k engineers; essentially enough scale to throw bodies at problems.
- lupire 5y agoWhy would a mistake only affect 4M users and not 400M?
- Rapzid 5y agoNo guarantees, but a feature flag or canary deploy can significantly increase likelihood of impacting a targeted subset of users.
- SgtBastard 5y agoLook at it the other way around - you could have a different outage every single day and as long as that outage only impacted 4.3m users and they were different users each day, it would look like a once-a-year event to the average user. They’re saying there’s a lot of leeway to break things (in a small way) at scale.