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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. Colm MacCárthaigh‏ @colmmacc 22 May 2019
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      Replying to @copyconstruct

      SRE culture has tentacles, and seems to bring error budgets, seemingly endless Kubernetes tinkering, and stack over-complication to some places. Plenty of good too, mostly good on balance, but some of it gets to me.

      1 reply 1 retweet 16 likes
    2. Cindy Sridharan‏ @copyconstruct 22 May 2019
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      Replying to @colmmacc

      Cargo-culting SRE culture considered harmful.

      1 reply 1 retweet 17 likes
    3. Jacob‏ @jhscott 22 May 2019
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      Replying to @copyconstruct @colmmacc

      the "platonic ideal" of error budgets seem to me like a useful goal to align all stakeholders (ugh) in the lifecycle (design, dev, operation) )of a "service". It seems to me like the cost of autonomy is an increased risk of externalizing failures (1/N)

      1 reply 0 retweets 3 likes
    4. Jacob‏ @jhscott 22 May 2019
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      Replying to @jhscott @copyconstruct @colmmacc

      E.g., "Whups, sorry a bug in a new feature in our microservice took down the whole platform". Error budgets simply provide a strong contract on how to gate feature velocity when these things happen. Probably more rarely, they can help enforce architectural desires (2/N)

      2 replies 0 retweets 1 like
    5. Colm MacCárthaigh‏ @colmmacc 22 May 2019
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      Replying to @jhscott @copyconstruct

      SLAs already do this. If you're in danger of missing an SLA ... more work on stability and resilience is evidently needed. Typically that means fewer features .. but naturally. I think having to gate features is unhealthy and a sign of organizational disfunction.

      1 reply 0 retweets 2 likes
    6. Jacob‏ @jhscott 22 May 2019
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      Replying to @colmmacc @copyconstruct

      I think that "strong contracts empower distributed ownership". Thus, an explicit error budget -- with e.g. common visibility of current value -- empowers teams to make the right decisions and have clear expectations what happens when you miss your SLA.

      2 replies 0 retweets 2 likes
    7. Colm MacCárthaigh‏ @colmmacc 22 May 2019
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      Replying to @jhscott @copyconstruct

      Measuring SLAs and how you're doing, down to each customer's experience, and having transparency about that ... that's all good. But that's just using an SLA IMO. Error budgets are an extra concept layered on top, and my point is I don't think it's a good one.

      4 replies 0 retweets 1 like
    8. Colm MacCárthaigh‏ @colmmacc 22 May 2019
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      Replying to @colmmacc @jhscott @copyconstruct

      Even the name implies that there's a budget for errors. It's a bad framing. Leads to behaviors like being less cautious when the budget is less spent. Or worst ... that you can plan to spend it pro-actively to help cut some corners.

      1 reply 0 retweets 1 like
    9. Jacob‏ @jhscott 22 May 2019
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      Replying to @colmmacc @copyconstruct

      ah but I think that's one of the best parts! Like there is always a balance between velocity and reliability, right? So setting an *appropriate* SLA and error budget makes it clear to e.g. product managers that you are moving slowly b/c you need five nines.

      1 reply 0 retweets 0 likes
    10. Jacob‏ @jhscott 22 May 2019
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      Replying to @jhscott @colmmacc @copyconstruct

      vs moving faster if you can get away with three nines. If your business use case can't take the corner cutting, tighten your SLA!

      1 reply 0 retweets 0 likes
      Colm MacCárthaigh‏ @colmmacc 22 May 2019
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      Replying to @jhscott @copyconstruct

      *shudder*. That is the exact unhealthy organizational dysfunction I'm talking about! First - we don't need to trade-off velocity and reliability. Investments in test and deployment automation, and in compartmentalization, usually deliver both. Second ...

      8:16 PM - 22 May 2019 from Seattle, WA
      • 4 Likes
      • ellj Tristam MacDonald Kathleen Tom Killalea
      1 reply 0 retweets 4 likes
        1. New conversation
        2. Colm MacCárthaigh‏ @colmmacc 22 May 2019
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          Replying to @colmmacc @jhscott @copyconstruct

          if you're in a PHB product managers are in charge but not listening situation ... fix that :) Best model is comprehensive team ownership of business, development, and operations, with mutual understanding.

          2 replies 0 retweets 2 likes
        3. Jacob‏ @jhscott 22 May 2019
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          Replying to @colmmacc @copyconstruct

          I don't disagree and/or I "want to believe", but the same way @copyconstruct alludes to error budgets being rarely deployed in practice, I believe that especially for hypergrowth companies, "investments in test and deployment automation" don't yield...

          1 reply 0 retweets 0 likes
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