OH: “What is it about DNS that people find so difficult?
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For the non-computer-science folks confused by this: these, along with off-by-one errors, are commonly described as the “two hardest problems in computer science”.
I worked with Phil at Netscape.
He was also responsible for the keg fridge in the kitchenette where our group sat…
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OH: “What is it about DNS that people find so difficult? It’s just cache invalidation and naming things.”
@mdreid I'm now wondering if I've ever had an off-by-one error when working with DNS, to get the hat trick. I fear it's possible.
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@mdreid I'm now wondering if I've ever had an off-by-one error when working with DNS, to get the hat trick. I fear it's possible.
@drewtowler If you get exactly two then that’s the hat trick right?
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@drewtowler If you get exactly two then that’s the hat trick right?
@mdreid Haha, I see what you did there.
(I think...)
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For the non-computer-science folks confused by this: these, along with off-by-one errors, are commonly described as the “two hardest problems in computer science”.
I believe the classic saying is:
There are only two hard problems in computer science:
0. Cache coherency
1. Naming things
2. Off-by-one errors.But, you top-level post made me literally laugh out loud, because I could _absolutely_ imagine the type(s) of person that might say it.
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I believe the classic saying is:
There are only two hard problems in computer science:
0. Cache coherency
1. Naming things
2. Off-by-one errors.But, you top-level post made me literally laugh out loud, because I could _absolutely_ imagine the type(s) of person that might say it.
@BoydStephenSmithJr Yes, that was the exactly the saying the original post and my follow up comment was alluding to.
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OH: “What is it about DNS that people find so difficult? It’s just cache invalidation and naming things.”
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@paul_ipv6 I mean, it’s right there in the name: “hard”ware.
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OH: “What is it about DNS that people find so difficult? It’s just cache invalidation and naming things.”
@mdreid Dylan Bettie made a similar joke https://youtu.be/9CSjlZeqKOc?t=446
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OH: “What is it about DNS that people find so difficult? It’s just cache invalidation and naming things.”
Yes. That's all!
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@mdreid I'm now wondering if I've ever had an off-by-one error when working with DNS, to get the hat trick. I fear it's possible.
@drewtowler @mdreid I almost certainly have, one of my uni classes made us implement a basic DNS server from scratch and I definitely overflowed a buffer at some point due to off by one
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@drewtowler @mdreid I almost certainly have, one of my uni classes made us implement a basic DNS server from scratch and I definitely overflowed a buffer at some point due to off by one
@tarix29 @drewtowler @mdreid
Come on, counting to 63 can't be that hard
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I believe the classic saying is:
There are only two hard problems in computer science:
0. Cache coherency
1. Naming things
2. Off-by-one errors.But, you top-level post made me literally laugh out loud, because I could _absolutely_ imagine the type(s) of person that might say it.
@BoydStephenSmithJr @mdreid this is absolutely my standard reply to this
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OH: “What is it about DNS that people find so difficult? It’s just cache invalidation and naming things.”
@mdreid Also off by one errors in your zone serial…
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@paul_ipv6 @mdreid And firmware.
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@paul_ipv6 @mdreid And firmware.
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@mdreid I'm now wondering if I've ever had an off-by-one error when working with DNS, to get the hat trick. I fear it's possible.
@drewtowler @mdreid 1) Name compression and offset handling (all DNS software was buggy in the past about that, confusing == and && when testing specific bits) and 2) bitsquatting (either from space rays or humans)
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