LIST

Heuristic: production software vs control plane

If production user data passes through it, it is production software. If it's main job is to manage other software, it is the control plane (src: Book_ release it! - Michael Nygard)

August 16, 2022

Heuristic: useful controls for Control Plane - live control

Which controls (src: Book_ release it! - Michael Nygard)

August 16, 2022

Heuristic: useful metrics

Heuristic: useful metrics (src: Book_ release it! - Michael Nygard)

August 16, 2022

Heuristic: when to run your own software load balancer

if your organization treats load balancers as "those things over there" that some other team manages, then you might even think about implementing a layer of software load balancing under your control (src: Book_ release it! - Michael Nygard)

August 16, 2022

Heuristic: when to use automation

once we're talking about shutting down more than 50% of total server capacity, the automation probably ought to pause for some human confirmation automation has no judgement We should use automation for the things that humans are bad at: repetitive tasks and fast response. We should use humans for things automation is bad at: perceiving the whole situation at a higher level (src: Book_ release it! - Michael Nygard)

August 16, 2022

Model: 12-factor app

(src: Book_ release it! - Michael Nygard) (origin: https://12factor.net)

August 16, 2022

Model: health check

page or api call that reveals the application's internal view of it's own health (src: Book_ release it! - Michael Nygard)

August 16, 2022

Model: Kingman's formula

Kingman’s formula: relationship between variation, resource efficiency and throughput time utilisation = resource efficiency (src: Book_ This is LEAN - Niklas Modig & Par Ahlstrom)

August 16, 2022

Model: Little's Law

throughput time = flow units in process * cycle time eg. time for you to make it through airport security queue = ppl before you * avg time to check a person (src: Book_ This is LEAN - Niklas Modig & Par Ahlstrom)

August 16, 2022

Model: Open Systems Interconnection (OSI) model

(src: OSI model - Wikipedia)

August 16, 2022