Published

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)

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

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

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)

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)

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

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

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

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)

(src: OSI model - Wikipedia)