What is AWS Lambda?
AWS Lambda is an Amazon Web Services serverless computing service (AWS). AWS Lambda users write functions, which are self-contained applications written in one of the supported languages and runtimes, and upload them to AWS Lambda, which then executes them in a fast and flexible manner.
Lambda functions can be used to do everything from serving web pages to processing data streams to using APIs and connecting with other AWS services.
The term “serverless” computing alludes to the fact that you don’t need to run these functions on your servers. AWS Lambda is a fully managed service that handles all of your infrastructure requirements. As a result, “serverless” does not imply that no servers are involved; rather, it implies that the servers, operating systems, network layer, and other infrastructure have already been taken care of, allowing you to concentrate on writing application code.
How does AWS Lambda work?
Each Lambda function has its container to run in. When a function is built, Lambda bundles it into a new container, which it then runs on an AWS-managed multi-tenant cluster of servers. Each function’s container is given the requisite RAM and CPU capacity before it begins to operate. When the functions are finished, the RAM allocated at the start is multiplied by the length of time the function took to complete. Customers are then charged based on the amount of allocated memory and the length of time it took for the function to complete.
AWS Lambda’s whole infrastructure layer is managed by AWS. Customers don’t have much control over how the system works, but they also don’t have to worry about maintaining the underlying machines, avoiding network conflicts, and so on — AWS handles all of that for them.
AWS Lambda can also save you time on operational activities because it is completely managed. You can spend more time focusing on the application code when there is no infrastructure to manage, yet you lose the flexibility of running your infrastructure.
Many instances of the same function, or separate functions from the same AWS account, can be executed concurrently, which is one of AWS Lambda’s unique architectural traits. Furthermore, concurrency can vary depending on the time of day or the day of the week, and Lambda doesn’t care — you’re just charged for computing your functions consume. AWS Lambda is a fantastic fit for creating highly scalable cloud computing applications because of this.
Benefits of using AWS Lambda
AWS Lambda has a few distinct advantages over running your own cloud servers. The most important are:
Pay as you go. You only pay for the computation your functions utilize, as well as any network traffic they generate, in AWS Lambda. This charging method is often more cost-effective for workloads that vary greatly depending on the time of day.
Infrastructure that is completely managed. You don’t have to worry about the underlying servers anymore because your functions are running on the managed AWS infrastructure. This can result in significant cost savings on operational duties like operating system upgrades and network layer management.
Scaling is done automatically. As requests come in, AWS Lambda produces instances of your function. There’s no pre-scaled pool, no scale levels to worry about, no parameters to fine-tune — and your functions are always available, regardless of the load. You only pay for the amount of time each function takes to run.
Integration with other AWS products is tight. AWS Lambda interfaces with AWS services such as DynamoDB, S3, and API Gateway, allowing you to create fully functional apps using Lambda functions.
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