What is AWS Lambda, How to create an AWS Lambda function?

 

 What is AWS Lambda?


AWS Lambda is computing service, which helps you to run your code without managing the servers. AWS Lambda provides a powerful compute infrastructure. It will manage your server by handling admin, compute resources, server, OS (Operating System), databases, automatic scaling, and logging credentials. 

Special features of Lambda is, you can run your application’s back-end services for virtually. 




How AWS Lambda works?

Lets’ see the AWS Lambda process in five steps 

Steps:1

Build your application code in programming languages such as Java, Python, Ruby, Go, C#, etc. 

Steps:2

Create an AWS Lambda account and login into the server portal. 

Steps:3

Create an AWS Lambda function and upload your code in the created function. 

Steps:4

After that, AWS services triggers the events in lambda function,

Steps:5

When it's getting triggered, Lambda function gets executed and run the application code by runtime. 


What is events in AWS Lambda?

The event is a document which contains JSON format data for AWS Lambda function. This event gets converted into an object and moves to a function code by the runtime. 

Events can be triggered by many AWS services, that is:

  • Amazon S3

  • Amazon API Gateway

  • Dynamo DB

  • Amazon SNS

  • Amazon Kinesis

  • CloudFront

  • Amazon SES

  • Cloud Trail and more.


Runtime

To work on AWS Lambda, you need to be familiar with specific programming languages. Lambda supports several run time and programming languages, that is:

  • Node.js runtime

  • Python runtime

  • Ruby runtime

  • Java runtime

  • Go runtime

  • .NET runtime


Events that trigger Lambda function: 

  • Insert, updating and deleting data Dynamo DB table

  • To include push notifications in SNS

  • To search for log history in CloudTrail

  • Entry into an S3 object

  • DynamoDB can trigger AWS Lambda whenever there is data added, modified, and deleted in the table.

  • Helps you to schedule the event to carry out the task at regular time pattern.

  • Modifications to objects in S3 buckets

  • Notifications sent from Amazon SNS.

  • AWS Lambda can be used to process the CloudTrail logs

  • API Gateway allows you to trigger AWS Lambda on GET/POST methods.




Cost of AWS Lambda

Cost is based on two parameters, that are:

  • Request

  • Time


In free trial period, you will get 1million free requests and 3 million seconds of computing time. 



Features of Lambda

  • Concurrency and scaling control

  • Functions defined as container images

  • Code signing

  • Lambda extensions

  • Function blueprints

  • Database access

  • File systems access


Benefits of AWS Lambda


  • Minimized cost

  • Automatic Scalability

  • Killer Use Cases

  • Quicker Iterative Development

  • Less Operational Management

  • Consolidate Functionality

  • Best customer services

  • It charges, when the function executes



Conclusion

We have learned the basic information about AWS Lambda. This blog covers what is AWS, AWS Lambda function, how it works, process, events, services, and benefits. 

If you want to know more about AWS in detail, check out this essential beginner guide of AWS Lambda made by AWS professionals of The Knowledge Academy. 

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