Reddit crashed because of the growing subreddit blackout
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Re: Reddit crashed because of the growing subreddit blackout
#2I have not read a reddit devblog or anything like that. My guess is they are doing some kind of caching of posts via elasticsearch/redis or something similar. It must depend on the privacy settings of a sub.
So when 1000 subs go private, they potentially had to update hundreds of millions of comments.
Anyone else have a theory?
Re: Reddit crashed because of the growing subreddit blackout
#3I thought it was a cloudflare outage.
Re: Reddit crashed because of the growing subreddit blackout
#4I have not read a reddit devblog or anything like that. My guess is they are doing some kind of caching of posts via elasticsearch/redis or something similar. It must depend on the privacy settings of a sub. So when 1000 subs go private, they potentially had to update hundreds of millions of comments. Anyone else have a theory?
The subreddits that are most popular are on high performance servers while the subreddits that are less popular are on lower performance servers?
Re: Reddit crashed because of the growing subreddit blackout
#5I have not read a reddit devblog or anything like that. My guess is they are doing some kind of caching of posts via elasticsearch/redis or something similar. It must depend on the privacy settings of a sub. So when 1000 subs go private, they potentially had to update hundreds of millions of comments. Anyone else have a theory?
Cache invalidation makes sense.
Could also be some kind of fanout query that assumes the top subreddits are open and wastes CPU cycles.
Re: Reddit crashed because of the growing subreddit blackout
#6I have not read a reddit devblog or anything like that. My guess is they are doing some kind of caching of posts via elasticsearch/redis or something similar. It must depend on the privacy settings of a sub. So when 1000 subs go private, they potentially had to update hundreds of millions of comments. Anyone else have a theory?
I'm skeptical. Most of the outages I've been involved in have been for way dumber reasons than that. Based on my dumb experience, my guess is that the handling for a user trying to access a private subreddit stressed some system that doesn't make sense to even exist.
Re: Reddit crashed because of the growing subreddit blackout
#7I thought it was a cloudflare outage.
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Re: Reddit crashed because of the growing subreddit blackout
#8How long before they admins swoop in and change ownership of the blacked out subreddits?
Re: Reddit crashed because of the growing subreddit blackout
#9I thought it was a cloudflare outage.
Pretty sure Reddit uses Fastly as a CDN.