Uncertain infrastructure
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Transcript of Uncertain infrastructure
Uncertain InfrastructuresWhat Science Tells Us About IT
Mark Burgess
Promises we can keep?Promises we can keep?
P - DescriPingH - StuffHY - ThaYtS - HappenS I - ..ah
C - ...S - .. ok whatever
Env
ironm
enta
lC
losu
re X
Sys
tem
s Th
inki
ng
SemanticsSemantics and and DynamicsDynamicsDesired-state and actual behaviourDesired-state and actual behaviour
DevDev + + OpsOps What you intend + What actually happensWhat you intend + What actually happens
Dev ? Ops ?
… but they are only in approximate balance
IT would be easy if systems were deterministic ...IT would be easy if systems were deterministic ...
LOGIC rains environmental complexity ...LOGIC rains environmental complexity ...
… … onto knife-edge sensitivityonto knife-edge sensitivity
“Continuous delivery requires continuous automation ... not power-assisted intervention”
Autonomous infrastructure
There is no such thing as an immutable systemThere is no such thing as an immutable system
No No intendedintended change is not the same as no change at all change is not the same as no change at all
““Many worlds” branches and relativityMany worlds” branches and relativity
““The history of attempts to prevent cracks from spreading or evade The history of attempts to prevent cracks from spreading or evade their consequences is almost the history of engineering.”their consequences is almost the history of engineering.”-- J.E. Gordon -- J.E. Gordon The New Science of Strong MaterialsThe New Science of Strong Materials
Failures are semanticFailures are semanticProcesses are dynamicProcesses are dynamic
Harp not on that keyboard!Harp not on that keyboard!Orchestration?Orchestration?Choreography?Choreography?
Control is ...Control is ...
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