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Build And Run Serverless Applications With AWS Lambda

Apr 10, 2020

Build And Run Serverless Applications With AWS Lambda |  Zero Administration

What is AWS Lambda?

AWS Lambda is a serverless compute service from AWS, which allows users to run their code in response to events .Lambda also takes care of the compute resources needed to run the code without any supervision from the users.

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What is Serverless Computing?

Serverless Computing belongs to the family of Cloud Computing where users can build and run their applications or backend services without worrying about infrastructure. Serverless should not be mistaken for “No Servers”, as the code still runs on the servers, with the only difference that the Server Provisioning, Management, Allocation is taken care of by the Cloud Service Provider instead of the users .

How does AWS Lambda work?

The main principle on which AWS Lambda works is that whenever an event is triggered, code uploaded to Lambda starts executing . This event may be anything, from a change to Amazon S3 bucket, updates to Amazon DynamoDB Table or custom events generated by your application or devices.The code that is run on Lambda is called a “Lambda Function”.

After you upload your code to AWS Lambda, you can associate your function with specific AWS resources (e.g. a particular Amazon S3 bucket, Amazon DynamoDB table, Amazon Kinesis stream, or Amazon SNS notification). Then, when the resource changes, Lambda will execute your function and manage the compute resources as needed in order to keep up with incoming requests.

What events can trigger an AWS Lambda function?

Please read this official documentation for details.

What languages are supported by AWS Lambda?

AWS Lambda natively supports Java, Go, PowerShell, Node.js, C#, Python, and Ruby code, and provides a Runtime API which allows you to use any additional programming languages to author your functions.

What are the advantages of AWS Lambda?

  1. No servers to manage or provision.Zero administration of resources.
  2. Runs code for virtually any type of application or backend service.
  3. Scales automatically.
  4. Integrates easily with AWS Services.
  5. Pay only for the time the code runs and no more.

What are the charges of using AWS Lambda ?

With AWS Lambda you pay only for what you use. The charges are calculated for the number of “Requests” (Each time Lambda starts executing in response to an event) for your function and the time your code takes to execute.For detailed pricing visit AWS Lambda Pricing Page.

Is AWS Lambda included in the free usage tier?

The AWS Lambda free usage tier includes 1M free requests per month and 400,000 GB-seconds of compute time per month.

If you are looking for pre-built serverless applications to use with AWS Lambda, check out this page

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