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How does having multiple lemmy servers spread the load?
(lemmy.world)
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this post was submitted on 21 Jul 2023
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Probably the same way a hybrid gas-electric car is more fuel efficient. In a hybrid, the battery revs up and down with need while the engine just powers the battery at a steady clip. Since the engine can run constantly at a fix optimum speed, it is more fuel efficient.
Likewise, I figure, each server has a certain amount of bandwidth. If everyone is on one server, all the posts and comments come at random intervals with spikes and troughs. Either the bandwidth gets throttled, which causes lag, or all the comments go through at the same time, which uses a lot of bandwidth. With multiple servers, those posts get federated and (probably, I'm guessing at this point) wait for the federated server to signal that they are no longer busy, which flattens the bandwidth demand.