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Sudarshan Yadav
Sudarshan Yadav

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📅 Day 20 | AWS Lambda — Serverless Compute in AWS ⚡☁️

#aws #devops #serverless

📅 Day 20 | AWS Lambda — Serverless Compute in AWS ⚡☁️

Today, I learned about AWS Lambda, a serverless compute service provided by AWS that lets you run code without provisioning or managing servers.

With Lambda, you only focus on writing code, and AWS automatically handles infrastructure, scaling, and availability. You pay only for the execution time, making it highly cost-effective and scalable.

AWS Lambda is a core service in modern DevOps and cloud-native architectures.

🔹 What is AWS Lambda?

AWS Lambda allows you to run code in response to events.

You can use Lambda to:

  • Process files
  • Handle API requests
  • Automate tasks
  • Build serverless backends

Supported languages:

  • Python
  • Node.js
  • Java
  • Go
  • C#

🔹 Why AWS Lambda is Important in DevOps?

Lambda helps DevOps teams by:

  • Eliminating server management
  • Automatically scaling applications
  • Reducing infrastructure costs
  • Integrating easily with CI/CD pipelines
  • Enabling event-driven architectures

🔹 How AWS Lambda Works (Step-by-Step)

  1. Developer writes Lambda function code
  2. Code is uploaded to AWS Lambda
  3. An event triggers the function (S3, API Gateway, SNS, SQS, EventBridge, etc.)
  4. AWS creates an execution environment
  5. Lambda runs the function
  6. Output is returned
  7. Logs & metrics are sent to CloudWatch

🔹 Common Lambda Triggers

  • Amazon S3 – file upload events
  • API Gateway – REST & HTTP APIs
  • Amazon SNS – notifications
  • Amazon SQS – message processing
  • EventBridge – scheduled jobs (cron)
  • DynamoDB Streams – data changes

🔹 AWS Lambda in CI/CD (DevOps Use Case)

Typical flow:

  1. Code pushed to GitHub
  2. CI/CD pipeline builds & tests
  3. Lambda function deployed
  4. Event triggers Lambda
  5. Application executes automatically

🔹 Real-World Use Cases

  • Serverless APIs
  • Image resizing & file processing
  • Automation scripts
  • Background jobs
  • Microservices
  • Monitoring & alerts

🔹 Interview Quick Answers

What is AWS Lambda?
A serverless compute service that runs code in response to events.

Do we manage servers in Lambda?
No, AWS fully manages the infrastructure.

How does Lambda scale?
Automatically scales based on the number of requests.

How is Lambda billed?
Based on number of executions and execution time.

🔹 Summary

AWS Lambda:

  • Is serverless and event-driven
  • Scales automatically
  • Reduces operational overhead

* Fits perfectly into DevOps workflows

Thank You

🔗 Connect With Me

🌐 Platform 🔗 Link
🐙 GitHub https://lnkd.in/d2F3JPa3
✍️ Dev.to Blog https://lnkd.in/dNtgqAME
💼 LinkedIn https://lnkd.in/d3NctxFT
📄 Resume (Google Drive) https://lnkd.in/dHDNsd_D

🔖 Hashtags

AWS #DevOps #CloudComputing #AWSLearning #EBS #VolumeMounting #DataPersistence #LearningJourney #CareerGrowth #DevOpsEngineer #AWSCommunity

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