Serverless Computing

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Serverless computing is a cloud-based execution model that allows creating and managing applications by eliminating the need to manage servers. It enables developers to focus on the front end. In the serverless model, the back-end is completely handled by the vendor. In serverless computing, the cloud service providers manage the servers and provision on-demand machine resources.

How does serverless computing work?

The serverless architecture can be considered as the combination of two ideas, Function-as-a-Service and Backend-as-a-service. In serverless computing, the back-end pieces, which can include data files, processing, and security codes are dormant until they are needed. When it is triggered by something done by the users, the service provider handles them, executes the code, and allocates space. When it is completed, the code becomes dormant again. The events are known as functions in the serverless computing model. It is a cloud-based model in which the provider handles the infrastructure tasks, including resource allocation, capacity planning, management, configurations, and scaling to patches, updates, scheduling, and maintenance. The resources aren’t held in volatile memory, instead, they took place in short parts. It enables users to pay for only the resources they actually consume. Since it is an event-driven model, developers don’t need to anticipate how many servers or bandwidth they need. It is possible to scale up or down depending on the needs.


What is serverless edge computing?

Serverless edge computing is an infrastructural method in which computing resources that deliver serverless functions are located geographically closer to users. When an event is triggered, the DNS resolves the function request to a point of presence, which is the nearest to the user. When it is completed, the response is delivered to the user along the same circuit as the first request.


Is serverless computing a PaaS?

Both serverless computing and Platform-as-a-Service are backend architectures and they look very similar. Both solutions focus on allowing developers to focus solely on application development by eliminating the infrastructure management. However, there is a significant difference between these architectures. One of the differences is in serverless, the application will automatically scale up or down depending on the demand, without any configuration required. On the other hand, in PaaS user should configure the scaling parameters. Thus, scaling is much faster in serverless applications. Another significant difference is the pricing. In Serverless, users exactly pay for the number of requests or execution time.

However, in PaaS solutions, users pay a flat fee regardless of how much of the resources they have used. PaaS users can customize the resource requirements, but the price doesn’t adjust dynamically depending on the usage. Overall, PaaS provides more control over the infrastructure configurations, unlike serverless computing. It makes it easier to test and debug the application for PaaS users. It also allows users to fine-tune the application, however, it also increases the complexity of the development and the deployment process. Finally, serverless computing saves users from vendor lock-ins. A PaaS user should restructure almost everything when migrating the system from one cloud provider to another. But, migrating serverless function between service providers are much easier since the functions are bundled with necessary dependencies and don’t rely on any vendor-specific solution.


Is serverless computing the same as cloud computing?

Cloud computing is an umbrella term that refers to the on-demand delivery of compute power, database storage, applications, and other IT resources via the internet with pay-as-you-go pricing. Thus, serverless computing is a form of cloud computing, similar to Paas, Saas, or Iaas.


What are the advantages and disadvantages of serverless computing?

Serverless computing eliminates the time required to deploy and manage the infrastructure allowing developers to focus on the application. Offloading routine tasks not only increases productivity but also reduces operational costs. In serverless computing, users only pay for the resources they have consumed, making it one of the most cost-effective solutions in the market. On the other hand, not controlling the server-side logic completely can have drawbacks. Depending on the provider, serverless solutions can have constraints on how the components can be interacted with, reducing flexibility.


Is serverless the future of cloud computing?

Each cloud computing model suits different needs and they are always evolving to meet the customers’ demands. Thus, it is hard to say that one solution will dominate the entire market. While serverless computing is gaining popularity, some organizations will probably prefer PaaS solutions since it offers more control over the infrastructure.


Is Kubernetes serverless computing?

Kubernetes and serverless computing are different things. Kubernetes is a tool used for the management and launching of containerized apps. Serverless computing is a concept in which users buy only computing time for their functions on the cloud.


Is serverless computing the same as containers?

Serverless computing isn’t the same as containers. A container is an isolated environment where applications can run based on all the necessary components and dependencies packed inside.

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