43
Lemmy Federation Architecture Change Proposal (github.com)
submitted 1 year ago by xtremeownage@lemmyonline.com to c/technology@beehaw.org
59 comments fedilink hide all child comments

https://github.com/LemmyNet/lemmy/issues/3245

I posted far more details on the issue then I am putting here-

But, just to bring some math in- with the current full-mesh federation model, assuming 10,000 instances-

That will require nearly 50 million connections.

Each comment. Each vote. Each post, will have to be sent 50 million seperate times.

In the purposed hub-spoke model, We can reduce that by over 99%, so that each post/vote/comment/etc, only has to be sent 10,000 times (plus n*(n-1)/2 times, where n = number of hub servers).

The current full mesh architecture will not scale. I predict, exponential growth will continue to occur.

Let's work on a solution to this problem together.

you are viewing a single comment's thread
view the rest of the comments
[-] russjr08@outpost.zeuslink.net 1 points 1 year ago

The issue though- those large instances are unable to keep up with demand and load, causing lots of federation issues.

I am probably missing something / being really oblivious (its been a long day...) but wouldn't this same problem occur to the hub server in your model?

Although thinking about it a bit more, I thought I recalled seeing one of the Lemmy devs mention that the biggest issue is the SQL queries that are ran for various actions (such as loading the front page) - if that is the case, I don't know if this idea would help with that.

The idea of a centralized hub server(s) also sounds like we'd be moving closer to the model of a centralized Reddit... But I guess in a way, the fact that larger instances exist in of itself poses the same issue?

... I'm probably just rambling to myself at this point, however, I do think a message queue type of system for federating events would be a good idea, for the sake of recovering from send failures.

this post was submitted on 21 Jun 2023
43 points (100.0% liked)

Technology

37742 readers
811 users here now

A nice place to discuss rumors, happenings, innovations, and challenges in the technology sphere. We also welcome discussions on the intersections of technology and society. If it’s technological news or discussion of technology, it probably belongs here.

Remember the overriding ethos on Beehaw: Be(e) Nice. Each user you encounter here is a person, and should be treated with kindness (even if they’re wrong, or use a Linux distro you don’t like). Personal attacks will not be tolerated.

Subcommunities on Beehaw:

This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.

founded 2 years ago
MODERATORS
alyaza@beehaw.org
TheRtRevKaiser@beehaw.org
gyrfalcon@beehaw.org
rs5th@beehaw.org
coldredlight@beehaw.org
Los@beehaw.org
SemioticStandard@beehaw.org
TheRtRevKaiser@kbin.social
remington@beehaw.org