Cloud Computing Intermediate

What is Lambda Function (Cloud)?

An AWS serverless compute service that runs code in response to events without provisioning or managing servers.

AWS Lambda executes functions triggered by events: API Gateway requests, S3 uploads, DynamoDB changes, SQS messages, scheduled events, and more. You pay only for execution time (billed per millisecond) with no idle costs.

Functions have memory (128MB-10GB), timeout (up to 15 minutes), and concurrent execution limits. Cold starts (first invocation delay) can be mitigated with provisioned concurrency. Lambda supports Python, Node.js, Java, Go, Ruby, .NET, and custom runtimes via containers.

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IaaS (Infrastructure as a Service)

A cloud service model providing virtualized computing resources like servers, storage, and networking over the internet.

SaaS (Software as a Service)

A cloud delivery model where software applications are hosted and managed by a provider and accessed by users over the internet.

Cloud Migration

The process of moving applications, data, and workloads from on-premises infrastructure to cloud computing environments.

Region and Availability Zone

Geographic locations where cloud providers operate data centers, with zones providing redundancy within a region.

Cloud Monitoring

Services that collect, analyze, and alert on metrics, logs, and traces from cloud infrastructure and applications.

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