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Megathread for Reddit Blackouts and News - Week 1
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this post was submitted on 12 Jun 2023
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Technology
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Seems like all the traffic had to go somewhere...
Lots of love for the Beehaw and other Lemmy admins this morning. It's never fun suddenly having to 10x scale. Although it sounds like everybody else on the internet is getting a heavy traffic load today too.
I think the most fun, unintended consequence is that there were some assumptions baked into the Reddit codebase and the large number of Private subreddits has caused massive disruption and outages for them. While others have speculated it might be a tactic to hamper the affects of the protest, it sure seems real plausible to have not anticipated 6K subreddits going private overnight.
As an engineer, this sounds most plausible - they had proactive detection and resolution in place against various attacks and system failures, which got triggered due to the massive drop in public subreddits/users/activity, and made everything worse. Honestly, this isn't a scenario their engineers could have easily predicted...
As a former sysadmin and a [still, for the moment] reddit moderator, my bet is that most of the subreddits that switched to private forgot to (or didn't know to) go into "new reddit" and switch off the thing that allows people to request being added to the now-private subreddit.
A HUGE influx of people pounding on the "let me in, add me to the sub" button, which sends modmail, may have overloaded the whole modmail system, which in turn sometimes goes kaflooey for no apparent reason (my theory is: it gets bored).
I'm just speculating of course, too, but could be some kind of sharding e.g. in the DB level. I can imagine the little subreddits draw little traffic hence fewer shards are allocated to them (like how S3 works).