What's changed: Created Cloud Digital Leader Chapter 6 (Domain 6 "Operations": financial governance and cost management = resource hierarchy (org/folder/project)/billing account/budgets and alerts/CUD-SUD/cost optimization; operational reliability and sustainability = SRE/availability-scalability/Cloud Monitoring-Cloud Logging/Carbon Footprint).
6.2Operational reliability and sustainability
Understand site reliability engineering (SRE), availability and scalability, monitoring and logging with Google Cloud Observability (Cloud Monitoring, Cloud Logging), and Google Cloud’s sustainability efforts (carbon neutral/carbon free).
Scaling in the cloud requires not just cost control but operations that keep systems running reliably. Site reliability engineering (SRE), pioneered by Google, runs operations with a software mindset and manages reliability as a measurable objective.
6.2.1Availability, scalability, and SRE
Availability means "usable when needed," raised by redundancy across multiple zones. Scalability means "adjusting with demand" (the autoscaling above). In SRE, you set service objectives as SLOs (service level objectives) and use a budget of acceptable downtime (error budget) to balance "release speed of new features" and "reliability." The key is "not aiming for 100%, but measuring and operating to appropriate targets."
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