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AWS Lambda

What is AWS Lambda

What is Serverless computing?

Serverless computing or serverless is an execution model where the cloud provider( AWS, Azure, or Google Cloud) is responsible for executing a piece of code by dynamically allocating the resources. And charging for the number of resources used to run the code. The code is generally run inside stateless containers that can be triggered by a variety of events including HTTP requests, queuing services, database events, file uploads, monitoring alerts, scheduled events (cron jobs), etc. The code that is sent to the cloud provider for execution is generally in the form of a function. Therefore serverless is sometimes called “Functions as a Service” or “FaaS”.

What is AWS Lambda?

AWS Lambda is the event-driven, serverless computing platform offered by Amazon as a part of Amazon Web Services. So you don’t need to worry about which AWS resources to launch, or how you will handle them. Instead, you need to add the code on Lambda, and it runs.
In AWS Lambda the code is executed based on the response of events in AWS services like add/delete files in S3, HTTP or HTTPS requests from Amazon API gateway, etc. AWS Lambda can only be used to run background tasks.
AWS Lambda function helps you to focus only on your products and business logic instead of handling operating system (OS) access control,right-sizing, provisioning, scaling, etc.

AWS

Features of AWS Lambda

  • Cost-effective: Just like other public cloud services, Lambda has a pay-as-you-go pricing model with a free tier, and it is one of the most appealing for cost savings. Lambda pricing is based on used memory, the number of requests used and execution duration rounded up to the nearest 100 milliseconds. It is a huge leap for fine-grained billing in order not to pay for spare compute resources compared to the second-based billing of EC2.
  • Scalability: When this comes to scalability, Lambda can scale up to a large number of parallel executions, handled by the number of concurrent executions requested. Scaling down is handled automatically, when the Lambda function execution completes, all the resources associated with it are automatically destroyed.
  • Provides multiple languages and frameworks: Lambda comes with native support of many programming languages: Python, Java, PowerShell, Go, Node.js, C#, and Ruby code, and offers a Runtime API that allows you to use any more programming languages to author your functions.
  • Fully event-driven: While most of the PaaS offerings are designed to be running 24/7, Lambda is fully event-driven. it will only run when called.

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