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colmmacc's profile
Colm MacCárthaigh
Colm MacCárthaigh
Colm MacCárthaigh
@colmmacc

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Colm MacCárthaigh

@colmmacc

AWS, Apache, Crypto, Irish Music, Haiku, Photography

Seattle
notesfromthesound.com
Joined April 2008

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    1. Marc Brooker‏ @MarcJBrooker 11 Apr 2018
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      Closed-form analysis of distributed system performance is really hard to get right, and even classic papers (like the Join-Idle-Queue paper) get it wrong: https://arxiv.org/abs/1606.01833 

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    2. Marc Brooker‏ @MarcJBrooker 11 Apr 2018
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      It seems like system designers are still inventing the equivalent of FEM by hand for every new system, and there's a huge opportunity for standardizing approaches and then baking them into standardized software.

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    3. Marc Brooker‏ @MarcJBrooker 11 Apr 2018
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      Recently, I consulted a structural engineer for some work on my house. Answering "how will this beam perform under load" took five minutes with software, and then some good intuition applied to check the software's work.

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    4. Marc Brooker‏ @MarcJBrooker 11 Apr 2018
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      Answering "how will this distributed system perform under load" is still orders of magnitude harder than that. Standardized components (cloud services) help, but the methods themselves still seem immature.

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    5. Pubs & Toasties  💖  🇮🇪 🇪🇺 🏳️‍🌈‏ @james_raftery 11 Apr 2018
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      Replying to @MarcJBrooker

      Are we asserting that the behaviour of hosted services is a) truly knowable from the outside, and b) static over time? The physics of a 2x4 is relatively static 😊

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    6. Marc Brooker‏ @MarcJBrooker 11 Apr 2018
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      Replying to @james_raftery

      Static, no. Knowable from the outside varies, but a lot of people put a lot of effort into making that true.

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      Colm MacCárthaigh‏ @colmmacc 11 Apr 2018
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      Replying to @MarcJBrooker @james_raftery

      I spent about 3 weeks trying to do the structural engineering math on the beams below my piano and bath tub. I wanted to understand what they would do in the event of an Earthquake. Turns out that kind of dynamic load is very complicated and often not modeled.

      3:39 PM - 11 Apr 2018
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        2. Marc Brooker‏ @MarcJBrooker 11 Apr 2018
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          Replying to @colmmacc @james_raftery

          Yeah, there are a lot of really hard edge cases in structures, and that's not well covered by the 'easy mode'. But distributed systems don't even have the 'easy mode' from what I've seen, let alone understanding what an earthquake would do.

          1 reply 0 retweets 0 likes
        3. Marc Brooker‏ @MarcJBrooker 11 Apr 2018
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          Replying to @MarcJBrooker @colmmacc @james_raftery

          Established engineering fields have also established much more of a safety factor on a lot of things, and an deep understanding of why failures matter. Our branch of engineering has a long way to go on that understanding and maturity.

          0 replies 0 retweets 0 likes
        4. End of conversation

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