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Mike Lambert
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Mike Lambert commented on a post on Blogger.
"For example, this is how we know that a significant fraction of incidents at Google come from configuration changes. (Remember this the next time someone says “but it’s just a config change” when trying to convince you that it’s a good idea to push it out late on the Friday before a long weekend . . .)"

Note, that collected data is very different from "what is the average failure rate of config changes vs code changes", and is what you'd actually want to know/think-about when being told something is "just a config change".

I recall that most pushes at Google are just config pushes. So saying most breakages are due to config pushes...doesn't actually say much at all!
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