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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

      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
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    2. 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
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    3. 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
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    4. 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 reply 1 retweet 25 likes
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    5. 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
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    6. Paolo Ardoino‏Verified account @paoloardoino Jan 28

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

      1 reply 1 retweet 16 likes
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    7. Paolo Ardoino‏Verified account @paoloardoino Jan 28

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

      9 replies 2 retweets 46 likes
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    8. This is Alpha‏ @alpha_authority Jan 28
      Replying to @paoloardoino

      Do you happen to know an open source trading engine that you’d consider a good starting point to experiment with?

      1 reply 0 retweets 0 likes
    9. Paolo Ardoino‏Verified account @paoloardoino Jan 28
      Replying to @alpha_authority

      There are many on GitHub (search open source matching engine) Ideally a trading engine is as simple as 2 binary trees (bid, ask), 1 input queue and 1 output queue. Managing complex order types, make it extremely performant and reliable is the complex part.

      1 reply 0 retweets 2 likes
    10. This is Alpha‏ @alpha_authority Jan 28
      Replying to @paoloardoino

      Thanks, for me performance is even more important than reliability since I want to do some faster than realtime simulations. Do you have experience whether Node makes sense at all or better do the extra hop to C++ even though it is supposed to run as an API service eventually?

      1 reply 0 retweets 0 likes
      Paolo Ardoino‏Verified account @paoloardoino Jan 28
      Replying to @alpha_authority

      I would suggest to go with C++ or Java. Node garbage collection is not as tweakable as Java (ZGC is really cool).

      5:36 AM - 28 Jan 2021
      • 1 Like
      • This is Alpha
      1 reply 0 retweets 1 like
        1. This is Alpha‏ @alpha_authority Jan 28
          Replying to @paoloardoino

          Been ages since I used C++ but was one of my first languages to earn - kind of excited… hehe

          0 replies 0 retweets 0 likes
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