• Ooops@feddit.org
        2·
        9 hours ago

        Low TTL of dns entries is there to avoid classical Cache Invalidation, so kind of…

      • aquovie@lemmy.cafeEnglish
        3·
        11 hours ago

        I keep seeing “networking is hard” come up here. Where is this coming from? Is it IPv6 or something?

        • blargh513@sh.itjust.worksEnglish
          8·
          10 hours ago

          I started in networks.

          The volume of people who work in technology that don’t understand networking is astonishing. I probably spent more time explaining how a web proxy works than I did actually setting things up.

          Firewall rules? Spells and magic. Routing? Unpossible! DNS? Forget it, I’m going home.

          • prettybunnys@piefed.socialEnglish
            2·
            6 hours ago

            Subnetting and the difference between /8 and /24 or /32 and how you allocate IP addresses between them has always been crazy for me to grasp.

            I feel like if I could finally understand that after 20 years … I’d be happy but no here I am, effectively ignorant to it and looking at networking wizards as true wizards

        • optional@sh.itjust.works
          5·
          10 hours ago

          Networking is so easy nowadays. Just plug a network cable into your device and it mostly works out of the box. Don’t you guys remember the bad old times of coax cables and token ring?

          Imagine providing a public WiFi before 1993, even if you ignore the fact that WiFis had a cable back then.

          • Ooops@feddit.org
            2·
            9 hours ago

            I’m not old enough to having been bothered by network rings and grew up with the high-tech that were end resistors.

    • who@feddit.orgEnglish
      5·
      10 hours ago

      OP might be suffering from cache misses. (Or maybe hasn’t yet learnt about it.)

  • humanspiral@lemmy.ca
    2·
    6 hours ago

    0 based indexing of course, so what’s the joke? oh, mixing up count and max index is a hardship you get over after a couple of years, but it comes back sometimes.

  • who@feddit.orgEnglish
    32·
    9 hours ago

    There are only two hard things in Computer Science: cache invalidation and naming things.

    — Widely attributed to Phil Karlton

    There are 2 hard problems in computer science: cache invalidation, naming things, and off-by-1 errors.

    — Leon Bambrick 2010-01-01

    • queerlilhayseed@piefed.blahaj.zoneEnglish
      6·
      6 hours ago

      Human-human interface configuration falls under networking issues. And naming things, now that I think about it.

      And occasionally off-by-one issues :(

    • Susaga@sh.itjust.worksEnglish
      5·
      10 hours ago

      It’s possible your coworkers are the ones dealing with those issues, and you just never notice.

    • queerlilhayseed@piefed.blahaj.zoneEnglish
      3·
      5 hours ago

      Off-by-one errors are real errors. A common mistake rookie developers make (or used to make, anyway) is forgetting that arrays are zero-indexed when creating an array, then seeing the value that should be in array[n-1] when they read array[n].

      Another common off-by-one error is double counting: Some accumulators don’t do all their processing in the same function, and occasionally one thing will be checked for inclusion twice, causing the accumulator to have one more element than it should.