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Cloud Computing Beginner

What is SLA (Service Level Agreement)?

A formal agreement between a service provider and customer defining guaranteed levels of service availability and performance.

SLAs specify measurable metrics like uptime percentage (99.9% = "three nines" = 8.76 hours downtime/year), response times, support availability, and remedies for violations (typically service credits).

Related concepts include SLO (Service Level Objective — internal target) and SLI (Service Level Indicator — actual measurement). Understanding SLAs is crucial for architecture decisions — achieving 99.99% requires fundamentally different design than 99.9%.

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An AWS service that automatically distributes incoming application traffic across multiple targets like EC2 instances and containers.
CloudFormation
An AWS service that provisions and manages cloud resources using declarative JSON or YAML templates.
Kubernetes Namespace
A virtual cluster within a Kubernetes cluster that provides scope for names and enables resource isolation between teams or environments.
CDK (Cloud Development Kit)
A software development framework for defining cloud infrastructure using familiar programming languages instead of YAML or JSON templates.
Cloud Computing
The delivery of computing services over the internet, including servers, storage, databases, and software on demand.
Hybrid Cloud
A computing environment that combines on-premises infrastructure with public cloud services, allowing data and applications to move between them.
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