AWS Lambda as a serverless compute service that allows you to run code without provisioning or managing servers.
What is AWS Lambda Function?
AWS Lambda is a serverless computing service provided by Amazon Web Services (AWS). It is an event-driven computing service. It lets a person automatically run code in response to many types of events, such as HTTP requests from the Amazon API gateway table updates in Amazon DynamoDB and state transitions. Explain the key concept of serverless architecture and how AWS Lambda fits into this paradigm.
Once you upload the source code file into AWS lambda in the form of ZIP file then AWS lambda will automatically run the code without you provision the servers and also it will automatically scaling your functions up or down based on demand. AWS lambda are mostly used for the event-driven application for the data processing Amazon S3 bucket or responding to HTTP requests.
How Does AWS Lambda
1. Creating a Lambda Function: To use AWS Lambda, you start by creating a Lambda function.
2. Triggering the Lambda Function : AWS Lambda is event-driven, meaning that a function is triggered by an event. The event could come from various AWS services (like S3, DynamoDB, SNS, SQS, etc.) or even HTTP requests from API Gateway.
3. Execution Environment : Once the event is triggered, AWS Lambda automatically provisions an execution environment for your function.
4. Scaling Automatically : One of the key benefits of AWS Lambda is automatic scaling.
5. Function Execution : The Lambda function executes your code in response to the event, and during execution, it can access resources like databases (DynamoDB, RDS), file storage (S3), or even invoke other AWS services (like Step Functions or Machine Learning models).
6. Logging and Monitoring : During the execution of a Lambda function
- Cloud Watch Logs.
- Cloud Watch Metrics.
7. Error Handling : If the function fails, AWS Lambda provides mechanisms like retries (for asynchronous invocations) and dead-letter queues (DLQs) to capture failed events.
8. Billing : You pay for what you use, based on two factors
- Number of Requests.
- Execution Duration.
Benefits:
Serverless Computing: With AWS Lambda, you don’t need to provision or manage servers. AWS handles the underlying infrastructure, including scaling and availability, so you can focus on writing and deploying code.
Automatic High Availability: When there is high demand or high incoming traffic aws lambda function will automatically scale the servers.
Free Tier: AWS Lambda includes a free tier (1 million requests and 400,000 GB-seconds per month), making it ideal for small projects, startups, or even low-volume applications that don’t require continuous compute resources.
Quick Setup: You can get started quickly with Lambda by uploading your code and configuring the event source. There’s no need to set up and manage the underlying infrastructure or compute resources.
Scalability: AWS Lambda runs code in response to each trigger, so the user’s application is automatically scaled. The code also runs in parallel processes, each triggered individually, so scaling is done precisely with the size of the workload.
Pricing:
A number of AWS Lambda executions are included with the AWS Free Tier with every AWS account. You have one million free requests per month which is free for all users and when coming to the duration you have 400,000 GB-seconds of compute time per month.
1. Request Pricing:Requests are the number of times your Lambda function is invoked. You pay for every request made to the Lambda function, regardless of whether it successfully executes or fails.
2. Duration Pricing:Duration refers to the amount of time it takes for your Lambda function to execute. Lambda charges for the time the function runs, measured in milliseconds.
3.Free Tier for AWS Lambda: The free tier is quite generous, making AWS Lambda an attractive option for low-volume workloads, testing, or small applications that don’t require extensive resources.
Conclusion:
AWS Lambda is a transformative service that simplifies the way we build and run applications. By offering serverless computing, Lambda enables developers to focus purely on writing code without the overhead of managing infrastructure, scaling, or provisioning servers.
