The way we build applications is changing: The way we understand - - PowerPoint PPT Presentation

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the way we build applications is changing
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The way we build applications is changing: The way we understand - - PowerPoint PPT Presentation

Apr 29, 2023 142 likes •420 views

The way we build applications is changing: The way we understand and manage them needs to change too Adrian Colyer, Accel @adriancolyer In association with Agenda How we got here The rules have changed Where were heading?

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The way we build applications is changing:

Adrian Colyer, Accel @adriancolyer The way we understand and manage them needs to change too

In association with

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Agenda

  • How we got here
  • The rules have changed
  • Where we’re heading…?
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Some buzzwords

Cloud native Kubernetes microservices serverless

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Some buzzwords

Cloud native Kubernetes microservices serverless

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Focus on delivery of value

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Optimising for throughput and latency

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Things become finer-grained over time

Image credit: Khan Academy, “Introduction to Integral Calculus”

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Shift left

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Shift left means…

  • In the loop, not after the loop
  • For the many, not the few
  • Taking an application/service

perspective

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Consequences

WHERE HAS ALL THE COMPLEXITY GONE? THE RIVER EMERGENT BEHAVIOURS GRAY FAILURES

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  • Bifurcations
  • Randomness
  • Stable averages, unstable details
  • Complex emergent behaviours

https://www.complexityexplorer.org/courses/105-introduction-to-dynamical-systems-and-chaos

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The rules have changed

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Instrument rated

Image credit: “5 3 Visual Flight Rules”, Robert Kowalksi. https://www.youtube.com/watch?v=r7u 8zj9m7EU

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“Embrace Complexity, Scale Agility”, Dave Snowdon 2015 https://www.youtube.com/watch?v=lYlqhvzI_VQ&feature=youtu.be

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Where we’re heading…

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Some challenges

  • Raising the level of abstraction
  • Rethinking design assumptions

(especially relating to hardware advances)

  • Software supply chain
  • Sustainable OSS
  • Increasing automation
  • Interpretability
  • Bias and Fairness
  • Operating at the limits
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Image Credit: Wikipedia (public domain)

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See also: “Above the Line, Below the Line”, Richard I. Cook, M.D., ACM Queue Vol 17, Issue 6

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APM as a sense- making instrument STAN as a ‘team player’

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Thank you.

acolyer@accel.com @adriancolyer

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Q&A

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Selected Resources

  • Project to Product, Mik Kersten, 2018
  • Value Stream Mapping, Martin &

Osterling, 2013

  • Accelerate State of DevOps Report,

Forsgren 2019

  • Cynefin framework, see e.g.: Embrace

Complexity, Scale Agility, Snowdon 2015

  • Introduction to dynamical systems and

chaos, Sante Fe Institute ‘Complexity Explorer’

  • Above the Line, Below the Line, Cook

2020

  • Resilience Engineering in practice,

Hollnagel et al, 2010

  • Ironies of Automation, Bainbridge 1983
  • Ten challenges for making automation a

team player in join human-agent activity, Klein et al., 2004

  • Trade-offs under pressure: heuristics and
  • bservations of teams resolving internet

service outages, Allspaw 2015

  • STELLA: report from the SNAFU-catchers

workshop on coping with complexity, Woods 2017

  • Gray failure: the achilles heel of cloud-

scale systems, Huang et al., 2017