Lambda and API Gateway

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Last updated 5:48 AM on 8/6/26
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10 Terms

1
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Event-driven, runs under 15 minutes, no server management

Lambda

2
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Public REST or HTTP front door for Lambda

API Gateway

3
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Throttle and meter known consumers

API Gateway usage plan with API keys

4
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Block malicious or bot traffic to API Gateway, CloudFront, or ALB

AWS WAF

5
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Multi-step workflow with branching, retries, and state

Step Functions

6
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Scheduled cron execution or reacting to AWS service events

EventBridge rule. Also the answer for SaaS partner events and cross-account event routing.

7
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Eliminate cold starts

Provisioned concurrency

8
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Cap a function's usage

Reserved concurrency

9
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Lambda needs to reach a private RDS instance

Put the function in the VPC in private subnets

10
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Lambda needs a shared writable POSIX filesystem

Attach EFS. Use /tmp only for ephemeral scratch.