Amazon Web Services (AWS) Introduction

Amazon Web Services (AWS) Introduction

At 6/1/2023

Amazon Web Services (AWS), a subsidiary of Amazon.com, has invested billions of dollars in computing resources distributed around the world. These resources are shared among all AWS account holders worldwide. These accounts themselves are entirely isolated from each other. AWS provides on-demand computing resources to its account holders on a pay-as-you-go model with no upfront costs. Amazon web services offer flexibility because you can only pay for the services you use or need. Businesses use AWS to reduce the capital expenditure of building their own private IT infrastructure (which can be expensive depending on the size and nature of the business). AWS has its own physical fiber network that connects to Availability Zones, Regions, and edge locations. All maintenance costs are also borne by AWS, saving companies a fortune.

Cloud security is the responsibility of AWS, but cloud security is the customer's responsibility. Performance efficiency in the cloud includes four main areas:

  1. Selection
  2. Review
  3. Surveillance
  4. barter

Benefits of Amazon Web Services

AWS makes it easy for you to scale your resources up or down as your needs change, helping you save money and ensuring your application always has the resources it needs.

AWS provides a highly reliable and secure infrastructure, with multiple data centers and a commitment to 99.99% availability for many of its services.

AWS offers a wide range of services and tools that can be easily combined to build and deploy a variety of applications, making it very flexible.

AWS offers a pay-as-you-go pricing model, allowing you to pay only for the resources you actually use and avoid upfront costs and long-term commitments.

Disadvantages of Amazon Web Services

  • AWS can be complex, with a wide range of services and features that can be difficult to understand and use, especially for new users.
  • AWS can be expensive, especially if you have a high-traffic application or need to run multiple services. Also, the cost of services can increase over time, so you should monitor your spending regularly.
  • Although AWS provides many security features and tools, securing your resources on AWS can still be challenging and you may need to implement additional security measures to meet your specific needs.
  • AWS manages many aspects of the infrastructure, which may limit your control over certain parts of your application and environment.

AWS Global Infrastructure

AWS' global infrastructure is massive and divided into geographic regions. The geographic regions are further divided into separate Availability Zones. When selecting geographic regions for AWS, three factors come into play

  • Latency Optimization
  • Cost reduction
  • Government regulations (Some services are not available for certain regions)

Each region is divided into at least two Availability Zones that are physically isolated from each other, providing infrastructure business continuity as in a distributed system. If one zone is down, the infrastructure in the other Availability Zones remains operational. The larger Northern Virginia (US-East) region has six Availability Zones. These availability zones are connected by a high-speed fiber optic network.

There are more than 100 edge locations spread around the world that are used for CloudFront (Content Delivery Network). Cloudfront can cache frequently used content such as images and videos (live video as well) at edge locations and distribute it to edge locations around the world for high-speed, low-latency delivery to end users. It also protects against DDOS attacks.

AWS Management Console

The AWS Management Console is a web interface for accessing AWS. It requires an AWS account and also has a smartphone app for the same purpose. So when you first log in, you see the console home page where you see all the services provided by AWS. Cost tracking is also done via the console.

AWS resources are also accessible through various software development kits (SDKs), which allow developers to build applications with AWS as their backend. There are SDKs for all major languages (e.g. JavaScript, Python, Node.js, .Net, PHP, Ruby, Go, and C++). There are mobile SDKs for Android, iOS, React Native, Unity, and Xamarin. AWS can also be accessed by making HTTP calls using the AWS-API. AWS also provides a command line interface (CLI) for remote access to AWS and can implement scripts to automate many processes. This console is also available as an app for Android and iOS. For mobile apps, you can simply download the AWS console app.

AWS Cloud Computing Models

There are three cloud computing models available on AWS.

  1. Infrastructure as a Service (IaaS): This is the cornerstone of cloud computing. It usually provides access to data storage space, networking features and computer hardware (virtual or dedicated hardware). It is very flexible and gives the developer control over IT resource management. For example, VPC, EC2, and EBS.
  2. Platform as a Service (PaaS): This is a type of service where AWS manages the underlying infrastructure (usually the operating system and hardware). This helps the developer to be more efficient as he does not have to worry about the undifferentiated heavy loads required to run the applications such as capacity planning, software maintenance, resource provisioning, patching, etc., and focuses more on application deployment and management. . For example, RDS, EMR, and ElasticSearch.
  3. Software as a Service (SaaS): This is a complete product that usually runs on a browser. It mainly refers to end-user applications. It is managed and managed by the service provider. The end user only has to worry about applying the right software to his needs. For example, Saleforce.com, webmail, Office 365.
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