In the Center of the Cyclone Finding Sources of Resilience John Allspaw @allspaw Adaptive Capacity Labs

No content

No content

No content

RESILIENCE

In the Center of the Cyclone Finding Sources of Resilience where to look? how to look? implies that they require effort to be identified

sustained adaptive capacity

“…the ability to recognize and adapt to handle unanticipated perturbations…” (Woods) “a resilient system must be both prepared, and be prepared to be unprepared.” (Pariès)

unforeseen unanticipated unexpected fundamentally surprising

where to look? how to look?

No content

externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results

externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results macro descriptions externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results

code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results

code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools system system framing doing code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results

deploy organization/ “monitoring” Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing code deploy organization/

code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results

code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results Copyright © 2016 by R.I. Cook for ACL, all rights reserved ack: Michael Angeles http://konigi.com/tools/ What matters. Why what matters matters. code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools above the line below the line Why is it doing that? What needs to change? What does it mean? How should this work? What’s it doing? What does it mean? What is happening? What should be happening What does it mean? Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results goals purposes risks cognition actions interactions speech gestures clicks signals representations artifacts the line of representation individuals have unique models of the “system” Copyright © 2016 by R.I. Cook for ACL, all rights reserved ack: Michael Angeles http://konigi.com/tools/ What matters. Why what matters matters. code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools above the line below the line Why is it doing that? What needs to change? What does it mean? How should this work? What’s it doing? What does it mean? What is happening? What should be happening What does it mean? Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results goals purposes risks cognition actions interactions speech gestures clicks signals representations artifacts the line of representation individuals have unique models of the “system” observing inferring anticipating planning troubleshooting diagnosing correcting modifying reacting

Copyright © 2016 by R.I. Cook for ACL, all rights reserved ack: Michael Angeles http://konigi.com/tools/ What matters. Why what matters matters. code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools above the line below the line Why is it doing that? What needs to change? What does it mean? How should this work? What’s it doing? What does it mean? What is happening? What should be happening What does it mean? Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results goals purposes risks cognition actions interactions speech gestures clicks signals representations artifacts the line of representation individuals have unique models of the “system” Copyright © 2016 by R.I. Cook for ACL, all rights reserved ack: Michael Angeles http://konigi.com/tools/ What matters. Why what matters matters. code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools above the line below the line Why is it doing that? What needs to change? What does it mean? How should this work? What’s it doing? What does it mean? What is happening? What should be happening What does it mean? Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results goals purposes risks cognition actions interactions speech gestures clicks signals representations artifacts the line of representation individuals have unique models of the “system” observing inferring anticipating planning troubleshooting diagnosing correcting modifying reacting

What matters. Why what matters matters. code deploy organization/ encapsulation “monitoring” Why is it doing that? hat needs to change? What does it mean? How should this work? What’s it doing? What does it mean? What is happening? What should be happening What does it mean? Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing go purp ris cogn act intera spe ges cli sig represe What matters. Why what matters matters. code deploy organization/ encapsulation “monitoring” Why is it doing that? hat needs to change? What does it mean? How should this work? What’s it doing? What does it mean? What is happening? What should be happening What does it mean? Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing go purp ris cogn act intera spe ges cli sig represe observing inferring anticipating planning troubleshooting diagnosing correcting modifying reacting

observing inferring anticipating planning troubleshooting diagnosing correcting modifying reacting unforeseen unanticipated unexpected fundamentally surprising …is what copes with and adapts to:

Copyright © 2016 by R.I. Cook for ACL, all rights reserved ack: Michael Angeles http://konigi.com/tools/ What matters. Why what matters matters. code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools above the line below the line Why is it doing that? What needs to change? What does it mean? How should this work? What’s it doing? What does it mean? What is happening? What should be happening What does it mean? Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results goals purposes risks cognition actions interactions speech gestures clicks signals representations artifacts the line of representation individuals have unique models of the “system” Copyright © 2016 by R.I. Cook for ACL, all rights reserved ack: Michael Angeles http://konigi.com/tools/ What matters. Why what matters matters. code repositories macro descriptions testing/validation suites code code stuff meta rules scripts, rules, etc. test cases code generating tools testing tools deploy tools organization/ encapsulation tools “monitoring” tools above the line below the line Why is it doing that? What needs to change? What does it mean? How should this work? What’s it doing? What does it mean? What is happening? What should be happening What does it mean? Adding stuff to the running system Getting stuff ready to be part of the running system architectural & structural framing keeping track of what “the system” is doing externally sourced code (e.g. DB) results the using world delivery technology stack internally sourced code results goals purposes risks cognition actions interactions speech gestures clicks signals representations artifacts the line of representation individuals have unique models of the “system” observing inferring anticipating planning troubleshooting diagnosing correcting modifying reacting RESILIENCE IS HERE (ABOVE THE LINE)

sustained adaptive capacity = human performance (cognitive work)

challenges and barriers to finding sources of resilience

No content

smoothing-the-messy-details- to-fit-a-model goggles

detect the issue develop hypothes(es) for contributors (in)validate hypothes(es) fix issue

enumerate possible causes use process of elimination collect more data refine remaining hypotheses prove remaining hypotheses cannot fix issue can

?

?

?

this is what I want you to pay attention to true, but unrelated to this talk

…how the CTO knew an esoteric trick to get things working again ...the realization that yes there IS actually a problem with AWS and Lisa in your infrastructure team called someone she knows there to get the issue escalated ...how Vanessa managed to improvise a script to piece together accidentally deleted data from Hadoop, Elasticsearch indexes, and the Wayback Machine before anyone notices ...what Jenn in Security does to discern ‘normal’ bug behavior from signals of an attack ...the realization that when a bottleneck appears in the analytics pipeline, there are some bits off data collection that can be shut off without severe impact we need to understand actual work

…the red herrings, rabbit holes, and unproductive threads of activity …what sources of data or information people do not trust …how responders bring newcomers up to speed …what sacrifice decisions people are making …how specialists in one field communicate problem solving to another … we need to hear about

No content

shallow data goggles

site down site up 29 min 18 min 16 min

Infra Eng1 4 years DBA 2.5 years DBA 1 years App Eng1 2 years Mobile Eng1 2.5 years App Eng3 3 years Infra Eng2 1.5 years App Eng2 1 years site down site up

site down site up called in for specific expertise also providing updates to customer support in parallel to responding to incident in Budapest with poor conference wifi unknowingly looking at incorrect availability zone log data

site down site up critical relayed observations stated
 hypotheses

logs time of year day of year time of day observations and hypotheses others share what has been investigated thus far what’s been happening in the world (news, service provider outages, etc.) time-series data alerts tracing/ observability tools recent changes in existing tech new dependencies who is on vacation, at a conference, traveling, etc. status of other ongoing work

No content

No content

we have to take off our Goggles Goggles Goggles

My experience is that our community has very little patience for looking closely and deeply at cognitive work. “What tool do I use?”

1999 1978 1996 This will take time.

http://resiliencepapers.club SRE Cognitive Work, Seeking SRE, O’Reilly http://stella.report

No content

THE END