View Counting at Reddit

#1

Post by strzalek » Sat, May 27, 2017, 6:13 PM UTC

Re: View Counting at Reddit

#2

Post by fiatjaf » Sat, May 27, 2017, 7:58 PM UTC

At https://trackingco.de/ we store events on Redis and compile them daily into a reduced string format, storing these on CouchDB.

Re: View Counting at Reddit

#3

Post by tsukaisute » Sat, May 27, 2017, 8:02 PM UTC

Weird thing I have been seeing on Reddit is comment upvotes being off-by-one periodically on page refreshes. Reload, you get 3. Reload again, you get 4. Again, you get 3. Seems like a replication issue?

Re: View Counting at Reddit

#4

Post by hellbanner » Sat, May 27, 2017, 8:03 PM UTC

Slightly OT; but I wish reddit would use traditional forum style replies to push threads up, instead of the positive feedback loop of votes with opinions that agree with majority getting upvotes giving views which give proportionally more upvotes

Re: View Counting at Reddit

#5

Post by kondor6c » Sat, May 27, 2017, 8:04 PM UTC

tsukaisute wrote: post #3

Weird thing I have been seeing on Reddit is comment upvotes being off-by-one periodically on page refreshes. Reload, you get 3. Reload again, you get 4. Again, you get 3. Seems like a replication issue?

I believe they are using cassandra to store the upvotes

Re: View Counting at Reddit

#6

Post by kelnage » Sat, May 27, 2017, 8:04 PM UTC

tsukaisute wrote: post #3

Weird thing I have been seeing on Reddit is comment upvotes being off-by-one periodically on page refreshes. Reload, you get 3. Reload again, you get 4. Again, you get 3. Seems like a replication issue?

> Weird thing I have been seeing on Reddit is comment upvotes being off-by-one periodically on page refreshes. Reload, you get 3. Reload again, you get 4. Reload, you get 3. Seems like a replication issue?

This is done on purpose [1], to prevent bots from calculating exact post/comment scores.

1. https://www.reddit.com/wiki/faq#wiki_how_is_a_comment.27s_sc...

Re: View Counting at Reddit

#7

Post by samtho » Sat, May 27, 2017, 8:06 PM UTC

tsukaisute wrote: post #3

Weird thing I have been seeing on Reddit is comment upvotes being off-by-one periodically on page refreshes. Reload, you get 3. Reload again, you get 4. Again, you get 3. Seems like a replication issue?

That's vote fuzzing you're seeing. It's to prevent people (read: bots) from being able to tell if they are shadowbanned.

Re: View Counting at Reddit

#8

Post by rjaco31 » Sat, May 27, 2017, 8:07 PM UTC

hellbanner wrote: post #4

Slightly OT; but I wish reddit would use traditional forum style replies to push threads up, instead of the positive feedback loop of votes with opinions that agree with majority getting upvotes giving views which give proportionally more upvotes

It might be conceivable on smaller subreddits, but on the big ones it would basically just drown everything into a sea of low-quality threads. I got the feeling that the vast majority of threads never ever make it to the "front page" of their subreddit.

Re: View Counting at Reddit

#9

Post by haburka » Sat, May 27, 2017, 8:09 PM UTC

I love the article on hyperloglog! It is really quite good to read even if you're not interested in algorithms. I always liked number theory and I think that it's very interesting that you can guess how many uniques there are by counting how long your longest run of zeroes in a hash is.

I suppose this could be broken by injecting in a unique visitor id that would hash to something with an absurd amount of zeroes? That's assuming that the user has control over their user id and that I'm understanding the algorithm correctly.

Re: View Counting at Reddit

#10

Post by qrbLPHiKpiux » Sat, May 27, 2017, 8:16 PM UTC

Not applied to /r/the_donald however.