can you explain a bit more
Sharding users among multiple threads in the matching engine allows running concurrent liquidation engines, one per shard. Can't scale unless you go parallel.
#bitfinex
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as far i understand it - simply put - BitFinex does not aggregate individual liquidation orders and executes the sum all in one go - BOOM - possibly having a major price impact such as the one BitMex experienced last Friday.
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I'm not sure what all that shit means but bitfinex handled remarkably well all the crazy volatility so kudos for that. Reliable and the best UI.
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No context. How far/long can something go parallel for?
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What do you do if liquidations in one thread move the price, causing or canceling liquidations in another thread? And I guess in general how do you handle users in different shards sending orders that would potentially change placability for users in other shards?
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It's always been my understanding that this is the biggest challenge. Sequential processing vs. multi-threading is difficult.
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