Cloud Cost Optimization
FinOps, cost monitoring, reserved instances, spot instances, resource tagging, waste reduction
1What is FinOps in the cloud context?
What is FinOps in the cloud context?
回答
FinOps (Financial Operations) is a cultural practice that brings financial accountability to the variable cloud spending model, combining engineering, finance and business. This approach enables teams to make data-driven decisions about tradeoffs between speed, cost and quality. FinOps encourages collaboration between developers, finance and operations to optimize cloud business value.
2What is the main difference between Reserved Instances (RI) and Savings Plans in AWS?
What is the main difference between Reserved Instances (RI) and Savings Plans in AWS?
回答
Reserved Instances require commitment to a specific instance type (family, size, region) for 1 or 3 years, offering up to 72% discount. Savings Plans are more flexible: they automatically apply to different instance families, sizes and regions, as long as usage respects an hourly spending commitment ($/hour). Savings Plans generally offer better operational flexibility for dynamic architectures.
3When to use Spot Instances in AWS?
When to use Spot Instances in AWS?
回答
Spot Instances offer up to 90% discount but can be interrupted with only 2 minutes notice. They are ideal for interruption-tolerant workloads: batch processing, CI/CD builds, data analysis, ML training. It's recommended to combine Spot with Auto Scaling Groups and diversification strategies (multiple instance types/AZs) to maximize availability. Never use Spot for critical databases or stateful services without replication.
What is the main objective of resource tagging for cost optimization?
How to identify and reduce zombie cloud resources?
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