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Lemmy Federation Architecture Change Proposal (github.com)

submitted 2 years ago by [email protected] to c/[email protected]

57 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.

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[–] [email protected] 5 points 2 years ago (13 children)

There is no need to "maintain all of the connections". The server opens a connection, sends the data, then closes the connection.

[–] [email protected] 1 points 2 years ago (12 children)

I realize that....

Let's- set the record straight here.

Do you think the current implementation of federation works well?

[–] [email protected] 5 points 2 years ago (8 children)

Federation isn't working well, but it's not working well because the big instances aren't able to keep up with all of the inbound/outbound messages, and if a message fails, that's it. Right now there's no automated way to resync and catch up on missed activity.

[–] [email protected] 1 points 2 years ago

How was syncing done in Usenet? It has a very similar decentralized model, and I don't recall there being problems of data loss due to desyncing between servers.

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