ReliabilityNOTE_01
Reliability is a design decision.
Availability is not something added at the end. It comes from choices about boundaries, dependencies and what happens when one of them fails.
Engineering notesNotes from
Notes from
the system.
Short, practical positions on how we build and operate technical systems.
Engineering notes.
OperationsNOTE_02
If you can't see it, you can't operate it.
A system without signals is operated by guesswork. Monitoring is not overhead — it is the interface to the running system.
DeliveryNOTE_03
Good systems fail before production.
A pipeline that catches problems early is cheaper than a rollback, and far cheaper than an incident.
ArchitectureNOTE_04
Software is only half the system.
Application code runs on infrastructure, moves data and is operated by people. Designing one without the others produces surprises.
SimplicityNOTE_05
Infrastructure without the noise.
Every additional component is another thing to configure, monitor, patch and explain. Complexity should be earned.
MaintenanceNOTE_06
Build it right. Keep it running.
Most of a system's cost appears after launch. Maintainability is a feature, decided long before the first support ticket.