Great stream. Original quote is: there are 2 hard problems in CS: naming things, cache invalidation, and off-by-one errors. Most of the stream was about content caching though and not so much about the kind of caches the quote was talking about.https://twitter.com/cmuratori/status/1451268903003250688 …
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I always assumed the quote had to do with invalidating cached website content. Browsers don't know when the content has changed, so how do they know whether they should pull from local cache or from the remote server?
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But that's not a real problem. There are only two cases: trivial, where it's a dependent asset, and therefore it is completely solved perfectly by putting the hash of the contents in the resource name; or impossible, where the main contents (eg. the html) can be changed any time.
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