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paoloardoino's profile
Paolo Ardoino
Paolo Ardoino
Paolo Ardoino
Verified account
@paoloardoino

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Paolo ArdoinoVerified account

@paoloardoino

CTO @bitfinex + CTO @tether_to [Views are my own]

London
github.com/prdn
Joined January 2010

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    1. Paolo Ardoino‏Verified account @paoloardoino 14 Mar 2020

      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

      4 replies 6 retweets 40 likes
    2. SBF‏Verified account @SBF_FTX 14 Mar 2020
      Replying to @paoloardoino

      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?

      1 reply 0 retweets 16 likes
    3. lowstrife‏ @lowstrife 14 Mar 2020
      Replying to @SBF_FTX @SBF_Alameda @paoloardoino

      It's always been my understanding that this is the biggest challenge. Sequential processing vs. multi-threading is difficult.

      1 reply 0 retweets 4 likes
    4. Frazer Sebastian (CHAD)‏ @SebastianFrazer 14 Mar 2020
      Replying to @lowstrife @SBF_Alameda @paoloardoino

      exactly multi threading users on different threads wont let the matching engine match orders on FIFO, which can be achieved through concurrency but not through parallel processing. It is one of the major problems in Computer science which cant be horizontally scaled.

      0 replies 0 retweets 2 likes
    5. This Tweet is unavailable.
    6. Frazer Sebastian (CHAD)‏ @SebastianFrazer 14 Mar 2020
      Replying to @crypto_disaster @lowstrife and

      If a big market order is coming in from one queue and a limit order is coming in from Another the market order takes the liquidity at which the limit order was going to add liquidity to the book then what?

      2 replies 0 retweets 1 like
      Paolo Ardoino‏Verified account @paoloardoino 15 Mar 2020
      Replying to @SebastianFrazer @crypto_disaster and

      Paolo Ardoino Retweeted Paolo Ardoino

      I replied on a RT because I am too lazy to split manually a long reply in different comments. Sorry.https://twitter.com/paoloardoino/status/1239125038755917824 …

      Paolo Ardoino added,

      Paolo ArdoinoVerified account @paoloardoino
      1/7 Problem: How to scale trading/liquidation engines up to 500k/1M/10M users? 100k users are manageable, but eventually single threaded architecture will bottleneck growing number of users. https://twitter.com/paoloardoino/status/1238965074427088903 …
      Show this thread
      2:44 AM - 15 Mar 2020
      • 1 Retweet
      • 4 Likes
      • Acetyle Frazer Sebastian (CHAD) SBF Pushhh
      0 replies 1 retweet 4 likes

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