I shared a link from NPR Tiny Desk but there was no image preview or video embed. After investigating this I learned that when you do that, each instance picks up the link and individually retrieves the link preview nearly simultaneously. For gargantuan sites like YT or Reddit, this is a trivial amount of traffic and not a problem, but for smaller sites like NPR this results in a sort of botnet DDOS attack on the site’s servers. More here. Another example here . For that reason, NPR has blocked Fediverse servers like Mastodon.
I have experienced this on my personal server as well (DDOS), but at the time didn’t know why, exactly.
This isn’t the end of the world, but certainly is not great and hurts engagement with the content. Is there a solution for this? Perhaps using some sort of webtorrent service like PeerTube where they just fetch the information from another fediverse server instead of the source server? Maybe fetching embeds client-side? At least that would stagger the requests.
E: Many people have replied comparing this to the Reddit “hug of death” or “The Slashdot effect”. This is not the same at all. Those are legitimate site visits from humans that happen over the course of several hours. This is the result of several thousand servers all automatically fetching the same image simultaneously , and without any human involvement, and potentially next to zero human traffic to the site, which is why I compared it to a botnet or DDOS attack.
Its not because it’s a lot, it’s because it all happens in the same instant, which does not resemble any sort of normal web traffic.
Solving it on the side that’s creating the problem is bad architecture? 🤔
Several potential solutions have been posited, if you just look through the comments.
If I just drop a link into IRC, Jabber, Matrix, and possibly Discord, every client will go to the server and request a preview. The only difference is how many clients are online. On sufficiently large servers, this can also cause a DDoS. The problem lies in server-side caching, not in the architecture of all messengers.
UPD: of course, this can be solved on the Lemmy side, but what will you do when the network grows even larger? A million servers will cause a DDoS even with random requests. You could of course send the preview with the post, but it seems that would permanently and strictly limit the type of preview, and it’s unclear how to handle custom servers.
Lots of normal traffic is instant. Throttling must be handled by for in this instance NPR or its providers routers because even if hammering is a bad practice, we are participating in why it happens at all if we just build structures to mitigate it.
Yes that’s why I included a solution, and explained explicitly that it can be solved but only temporarily
Not instant from a thousand different servers. That’s what a botnet looks like. AKA DDOS. That’s why I explained that. Why are you acting like you don’t understand this?
No. It mustn’t. AP servers can fix it on their end.
Which you then went on to explain wasn’t a solution…?
You may suffer from irritation of your ego my friend. Know that you are not your ideas or projects, you are more than that. I feel like all of your questions were previously answered sorry.
You may suffer from the dumbs, my friend. My questions were answered. Before you showed up.
Stop with the “you may suffer from” nonsense (both of you). You’re being rude to each other and it’s generating reports.
I’m going to continue being rude to people who are rude to me. Sorry, not sorry.
That’s why I specifically said “both of you” and took no action beyond asking you both nicely to stop. Keep being rude if you really want, but it’ll be a ban.