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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 Jan 28

      1/ @bitfinex infrastructure thread Till Jan 2018 Bitfinex was using cloud hosting providers (AWS) as main site for the platform. We soon figure out that was almost impossible to scale a CEX on cloud. Here is the train of thoughts that we had in the mighty infrastructure team.

      8 replies 15 retweets 111 likes
      Show this thread
    2. Paolo Ardoino‏Verified account @paoloardoino Jan 28

      2/ Problems (1): - order/execution full roundtrip should be ~1ms or lower, should be improved over time (0.1ms target) - mange 10k+ to 100k+ orders/sec - recording to historical data stores all events, available to users via API and UI

      2 replies 1 retweet 18 likes
      Show this thread
    3. Paolo Ardoino‏Verified account @paoloardoino Jan 28

      3/ Problems (2): - handling billions of events per day and recording them it's one of the main bottlenecks of (crypto) exchanges -> DBMS have to record 100k events per second sustained? - on cloud you're not sure how CPU gets allocated (trading engine is a CPU bound process)

      1 reply 3 retweets 17 likes
      Show this thread
    4. Paolo Ardoino‏Verified account @paoloardoino Jan 28

      4/ Problems (3): - disk throughput can be throttled (GP2, IO1) - if you use SSDs on cloud, which model do you have, are you the only writer?, how to get a proper RAID setup?, ... - how to minimize the number of switches between your instances? - unpredictable network behaviors

      1 reply 1 retweet 16 likes
      Show this thread
    5. Paolo Ardoino‏Verified account @paoloardoino Jan 28

      5/ Problems (4): - reliable UDP multicast: AWS seems not to support UDP multicast, while GC does not. Anyway what's the expected packet loss? - security: spectre attacks, data hosted on 3rd party, ... - #crypto is growing. When next bull run? How to ensure 10x/100x scalability

      2 replies 1 retweet 17 likes
      Show this thread
    6. Paolo Ardoino‏Verified account @paoloardoino Jan 28

      6/ Path to metal 🤘🤘🤘 Our infra team has outstanding experience in secure, god wrath resistant, deployments, so we discussed a lot about pros and cons. Here are the 2 cons summarized: - hardware decay - physical hosts maintenance (trips to datacenter, hardware expertise, ...)

      3 replies 2 retweets 17 likes
      Show this thread
      Paolo Ardoino‏Verified account @paoloardoino Jan 28

      7/ Benefit (1): - the entire infra behavior is predictable - RAID enabled historical sharded data-warehouses kick asses - KYD, KYM and KYC 😅: Know Your Disk, Know your Mem and Know Your CPU - dedicated switches and firewalls, back to back connectivity for core servers

      1:34 AM - 28 Jan 2021
      • 1 Retweet
      • 25 Likes
      • Spirit_of_Ecstasy Strange Paradigms⚡🟧 dstadulis 👑ULTRA caotic 🔑 Stuart Hoegner Omid ABDU
      1 reply 1 retweet 25 likes
        1. New conversation
        1. Paolo Ardoino‏Verified account @paoloardoino Jan 28

          8/ Benefit (2): - reliable UDP multicast - bare-metal Linux installs - you're the only one using your CPU (see spectre-like attacks) - colocation services offering

          2 replies 1 retweet 15 likes
          Show this thread
        2. Paolo Ardoino‏Verified account @paoloardoino Jan 28

          9/ Go pro on @bitfinexhttps://www.bitfinex.com/pro/ 

          1 reply 1 retweet 16 likes
          Show this thread
        3. Paolo Ardoino‏Verified account @paoloardoino Jan 28

          10/ here is a potatopic.twitter.com/zVw8CCLL00

          9 replies 2 retweets 46 likes
          Show this thread
          4. End of conversation

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