AWS Lambda is an event-driven, serverless computing platform provided by Amazon as a part of Amazon Web Services. It is designed to enable developers to run code without provisioning or managing servers. It executes code in response to events and automatically manages the computing resources required by that code. It was introduced on November 13, 2014.[1]
Node.js, Python, Java, Go,[2] Ruby,[3] and C# (through .NET) are all officially supported as of 2018[update]. In late 2018, custom runtime support[4] was added to AWS Lambda.
AWS Lambda supports running native Linux executables by calling them from a supported runtime, such as Node.js.[5]
AWS Lambda was primarily designed for tasks such as handling image and object uploads to Amazon S3, updating DynamoDB tables, responding to website clicks and reacting to sensor readings from IoT connected devices. AWS Lambda can also be used to automatically provision back-end services triggered by custom HTTP requests, and "spin down" such services when not in use to save resources. These custom HTTP requests are configured in AWS API Gateway, which can also handle authentication and authorization in conjunction with AWS Cognito.
Unlike Amazon EC2, which is billed by the second (with a minimum of 60 seconds), AWS Lambda is billed by the millisecond with no minimum.
AWS Lambda functions are often used in association with AWS SQS queues to process asynchronous tasks in distributed architectures.
In 2019, at the AWS annual cloud computing conference (AWS re:Invent), the AWS Lambda team announced "Provisioned Concurrency", a feature that "keeps functions initialized and hyper-ready to respond in double-digit milliseconds."[6] The Lambda team described Provisioned Concurrency as "ideal for implementing interactive services, such as web and mobile backends, latency-sensitive microservices, or synchronous APIs."[7]
^Barr, Jeff (November 13, 2014). "AWS Lambda – Run Code in the Cloud". AWS News Blog. Retrieved August 29, 2022.
^Munns, Chris (January 15, 2018). "Announcing Go Support for AWS Lambda". Amazon Web Services. Retrieved December 10, 2019.
^Munns, Chris (November 29, 2018). "Announcing Ruby Support for AWS Lambda". Amazon Web Services. Retrieved December 10, 2019.
^"AWS Lambda Now Supports Custom Runtimes and Enables Sharing Common Code Between Functions". Amazon Web Services. November 29, 2018. Retrieved December 10, 2019.
^Wagner, Tim (April 15, 2015). "Running Arbitrary Executables in AWS Lambda". AWS Compute Blog. Retrieved December 10, 2019.
^"New – Provisioned Concurrency for Lambda Functions". aws.amazon.com. 3 December 2019. Retrieved 2020-10-12.
^"New – Provisioned Concurrency for Lambda Functions". Amazon Web Services. 2019-12-03. Retrieved 2020-02-03.
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