#resilienceengineering — Public Fediverse posts

AWS US-EAST-1 outage (Oct 20, 2025): Root cause & lessons

A DNS race condition in DynamoDB led to empty endpoint records, triggering cascading failures across AWS services like EC2 and Lambda.

Explore what went wrong and how to build resilient cloud systems:
https://shorturl.at/sJO5K

#AWS #CloudComputing #DevOps #DynamoDB #ResilienceEngineering

AWS US-EAST-1 outage (Oct 20, 2025): Root cause & lessons

A DNS race condition in DynamoDB led to empty endpoint records, triggering cascading failures across AWS services like EC2 and Lambda.

Explore what went wrong and how to build resilient cloud systems:
https://shorturl.at/sJO5K

#AWS #CloudComputing #DevOps #DynamoDB #ResilienceEngineering

A communications failure disrupted air traffic operations across Greece, grounding and diverting flights for several hours. Officials report no evidence of a cyberattack, with technical and judicial investigations underway.

The incident reinforces the importance of resilience engineering, redundancy testing, and modernization in safety-critical systems - alongside cyber defense.

From an infosec and resilience standpoint, where should investment be prioritized?

Source: https://www.securityweek.com/cyberattack-unlikely-in-communications-failure-that-grounded-flights-in-greece/

Share insights and follow @technadu for objective coverage.

#CriticalInfrastructure #ResilienceEngineering #AviationSecurity #Infosec #OperationalRisk #SystemsReliability

A communications failure disrupted air traffic operations across Greece, grounding and diverting flights for several hours. Officials report no evidence of a cyberattack, with technical and judicial investigations underway.

The incident reinforces the importance of resilience engineering, redundancy testing, and modernization in safety-critical systems - alongside cyber defense.

From an infosec and resilience standpoint, where should investment be prioritized?

Source: https://www.securityweek.com/cyberattack-unlikely-in-communications-failure-that-grounded-flights-in-greece/

Share insights and follow @technadu for objective coverage.

#CriticalInfrastructure #ResilienceEngineering #AviationSecurity #Infosec #OperationalRisk #SystemsReliability

A communications failure disrupted air traffic operations across Greece, grounding and diverting flights for several hours. Officials report no evidence of a cyberattack, with technical and judicial investigations underway.

The incident reinforces the importance of resilience engineering, redundancy testing, and modernization in safety-critical systems - alongside cyber defense.

From an infosec and resilience standpoint, where should investment be prioritized?

Source: https://www.securityweek.com/cyberattack-unlikely-in-communications-failure-that-grounded-flights-in-greece/

Share insights and follow @technadu for objective coverage.

#CriticalInfrastructure #ResilienceEngineering #AviationSecurity #Infosec #OperationalRisk #SystemsReliability

A communications failure disrupted air traffic operations across Greece, grounding and diverting flights for several hours. Officials report no evidence of a cyberattack, with technical and judicial investigations underway.

The incident reinforces the importance of resilience engineering, redundancy testing, and modernization in safety-critical systems - alongside cyber defense.

From an infosec and resilience standpoint, where should investment be prioritized?

Source: https://www.securityweek.com/cyberattack-unlikely-in-communications-failure-that-grounded-flights-in-greece/

Share insights and follow @technadu for objective coverage.

#CriticalInfrastructure #ResilienceEngineering #AviationSecurity #Infosec #OperationalRisk #SystemsReliability

More entries to the Practice of Practice collection! Grow with your team! Find that empathy everyone is talking about! Build relationships! Learn the system!

systems seeing journalling by @RuthMalan

instrumenting complexity with LEGO from @mike_bowler

https://github.com/maroda/practiceofpractice

#SRE #PracticeOfPractice #ResilienceEngineering #GamePlay #Improvisation

Was sharing this with a friend today, my description of a game called "Wheel of Expertise" that helps teams dig into deep specifics of their systems:

https://www.popg.xyz/2024/05/23/wheelofexpertise/

#SRE #ContinuousLearning #ConnectiveLabor #IncidentResponse #ComplexSystems #WheelOfExpertise #ResilienceEngineering

The people all said

Sit down
Sit down you're rockin the boat

#MyLife #SRE #ResilienceEngineering #GeurillaResilience #LaidOff #LetGo #DeadParrot

Here's a new blog post from me! It's a small "book" review, which is actually a workbook with some essays at the beginning.

The short book is Maj. John Schmitt's exercise book on Tactical Decision Games (TDGs) for the Marines (and likely other branches), and I noticed how much the philosophy behind them is shared with the sorts of Practice of Practice games we play to understand the system and prepare ourselves for incidents.

https://www.sounding.com/2025/05/02/schmitt-tdg-sre/

#SRE #TDG #PracticeOfPractice #TabletopExercises #OperationalReadiness #IncidentResponse #TacticalDecisionGames #Resilience #ResilienceEngineering #ReliabilityEngineering

Here's a new blog post from me! It's a small "book" review, which is actually a workbook with some essays at the beginning.

The short book is Maj. John Schmitt's exercise book on Tactical Decision Games (TDGs) for the Marines (and likely other branches), and I noticed how much the philosophy behind them is shared with the sorts of Practice of Practice games we play to understand the system and prepare ourselves for incidents.

https://www.sounding.com/2025/05/02/schmitt-tdg-sre/

#SRE #TDG #PracticeOfPractice #TabletopExercises #OperationalReadiness #IncidentResponse #TacticalDecisionGames #Resilience #ResilienceEngineering #ReliabilityEngineering

Here's a new blog post from me! It's a small "book" review, which is actually a workbook with some essays at the beginning.

The short book is Maj. John Schmitt's exercise book on Tactical Decision Games (TDGs) for the Marines (and likely other branches), and I noticed how much the philosophy behind them is shared with the sorts of Practice of Practice games we play to understand the system and prepare ourselves for incidents.

https://www.sounding.com/2025/05/02/schmitt-tdg-sre/

#SRE #TDG #PracticeOfPractice #TabletopExercises #OperationalReadiness #IncidentResponse #TacticalDecisionGames #Resilience #ResilienceEngineering #ReliabilityEngineering

Here's a new blog post from me! It's a small "book" review, which is actually a workbook with some essays at the beginning.

The short book is Maj. John Schmitt's exercise book on Tactical Decision Games (TDGs) for the Marines (and likely other branches), and I noticed how much the philosophy behind them is shared with the sorts of Practice of Practice games we play to understand the system and prepare ourselves for incidents.

https://www.sounding.com/2025/05/02/schmitt-tdg-sre/

#SRE #TDG #PracticeOfPractice #TabletopExercises #OperationalReadiness #IncidentResponse #TacticalDecisionGames #Resilience #ResilienceEngineering #ReliabilityEngineering

Here's a new blog post from me! It's a small "book" review, which is actually a workbook with some essays at the beginning.

The short book is Maj. John Schmitt's exercise book on Tactical Decision Games (TDGs) for the Marines (and likely other branches), and I noticed how much the philosophy behind them is shared with the sorts of Practice of Practice games we play to understand the system and prepare ourselves for incidents.

https://www.sounding.com/2025/05/02/schmitt-tdg-sre/

#SRE #TDG #PracticeOfPractice #TabletopExercises #OperationalReadiness #IncidentResponse #TacticalDecisionGames #Resilience #ResilienceEngineering #ReliabilityEngineering

Saturday morning read: I wrote a review of a fairly well known Tactical Decision Games exercise book written 30 years ago that is still applicable today. I wanted to show how the ideas behind such practice are exactly like how we practice for the unexpected in fields like SRE and Arctic rescue.

https://www.sounding.com/2025/05/02/schmitt-tdg-sre/

#SRE #TDG #MajJohnSchmitt #NDM #GaryKlein #NaturalisticDecisionMaking #ResilienceEngineering #PracticeOfPractice #TacticalDecisionGames #ChaosEngineering

Hey y'all! Any SREs out there?

Any *aspirational* SREs out there?

Maybe there's a team at work who they call "SRE" and you're really not sure what they do if it's not infra/platform/deploy?

A coworker is interested in switching careers to SRE and asked me for reading recommendations. So I put together the most solid top-five for me, from my experience and perspective of doing Ops for 30 years and SRE for 12:

https://www.sounding.com/2024/10/03/five-reads-for-learning-sre/

#SRE #ContinuousLearning #ResilienceEngineering #ReliabilityEngineering #DevOps #TechOps #HumanError #ComplexSystems #SystemsThinking

Hey y'all! Any SREs out there?

Any *aspirational* SREs out there?

Maybe there's a team at work who they call "SRE" and you're really not sure what they do if it's not infra/platform/deploy?

A coworker is interested in switching careers to SRE and asked me for reading recommendations. So I put together the most solid top-five for me, from my experience and perspective of doing Ops for 30 years and SRE for 12:

https://www.sounding.com/2024/10/03/five-reads-for-learning-sre/

#SRE #ContinuousLearning #ResilienceEngineering #ReliabilityEngineering #DevOps #TechOps #HumanError #ComplexSystems #SystemsThinking

Hey y'all! Any SREs out there?

Any *aspirational* SREs out there?

Maybe there's a team at work who they call "SRE" and you're really not sure what they do if it's not infra/platform/deploy?

A coworker is interested in switching careers to SRE and asked me for reading recommendations. So I put together the most solid top-five for me, from my experience and perspective of doing Ops for 30 years and SRE for 12:

https://www.sounding.com/2024/10/03/five-reads-for-learning-sre/

#SRE #ContinuousLearning #ResilienceEngineering #ReliabilityEngineering #DevOps #TechOps #HumanError #ComplexSystems #SystemsThinking

Hey y'all! Any SREs out there?

Any *aspirational* SREs out there?

Maybe there's a team at work who they call "SRE" and you're really not sure what they do if it's not infra/platform/deploy?

A coworker is interested in switching careers to SRE and asked me for reading recommendations. So I put together the most solid top-five for me, from my experience and perspective of doing Ops for 30 years and SRE for 12:

https://www.sounding.com/2024/10/03/five-reads-for-learning-sre/

#SRE #ContinuousLearning #ResilienceEngineering #ReliabilityEngineering #DevOps #TechOps #HumanError #ComplexSystems #SystemsThinking

Hey y'all! Any SREs out there?

Any *aspirational* SREs out there?

Maybe there's a team at work who they call "SRE" and you're really not sure what they do if it's not infra/platform/deploy?

A coworker is interested in switching careers to SRE and asked me for reading recommendations. So I put together the most solid top-five for me, from my experience and perspective of doing Ops for 30 years and SRE for 12:

https://www.sounding.com/2024/10/03/five-reads-for-learning-sre/

#SRE #ContinuousLearning #ResilienceEngineering #ReliabilityEngineering #DevOps #TechOps #HumanError #ComplexSystems #SystemsThinking

New entry for Practice of Practice Gamelan, where I introduce the game Wheel of Expertise that I developed for sharing mental models and performing knowledge elicitation.

#SRE #SocioTechnical #ResilienceEngineering #Operations #Teamwork #CTA #NDM #HumanFactors

https://www.popg.xyz/2024/05/23/wheelofexpertise/