AWS Lambda is serverless compute service which Lets you run code without deploying servers. Lamda has inbuild high avalibility as well as it scales automatically as per the demand of code. You can run any kind of service with Lamda- A Web App frontend as well with backend. Best part of using Lambda is you dont need anyone to manage your server, it is a 100% PAAS service from AWS.
Even though Lambda Function is so useful however there are few Pro and Cons for using Lambda Function. Let’s dicsuss about them one-by-one.
With AWS lambda you pay for what you use, if there is inactivity, you simply don’t pay for anything. However WIth other types of EC2 instances, you might end up paying a lot for inactivity time as well. so if you are using some App or Server which has lot of inactivity time. You might just use AWS lambda instead.
Even though lots of Cloud services are managed by Service Provider, however it is not true, you would still need to manage your custom logic that you build on top of EC2 instances or RDS etc. so you need SREs or Cloud Engineers to perform those tasks However with AWS Lambda, it is fully managed by AWS and has all HA and DR features inbuilt so you dont really need anyone else to Manage the AWS lamba resources.
Since Lambda Function is very fast to deploy, you can simply put your logic and your app starts to work. You dont need to wait for Infrastrucutre to be ready before you actually start to work on code. Lambda has lots of inbuild functionality which can make things easier for developers.
AWS lambda function are mostly suited for quick operations, they tend to timeout if the operation goes beyond 5 minutes. So it might not be good for logics like video processing which tend to take more than 5 minutes or huge database queries for reports.
Since AWS Lambda is AWS provided/ Developed service and you have limited visibility if you want some custom monitoring or debugging even though AWS provides a lot of information however sometimes you need much more information than this which you can easily get from servers if it was built on EC2 instance.
It is hard to implement more complex business logic with AWS lambda Function, you you want to implement complex logics, it is better to implmenet via other ways instead of using Lambda FAAS.
We belive that AWS lambda is very good service and has been in use by a lots of customers and it is imporoving day-by-day and you can get atleast 50-60% of your work done using AWS lambda function now a days.
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