AWS Lambda

Website

aws.amazon.com

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Categories

#Cloud Computing #Cloud Hosting #Business & Commerce #Object Storage

Application Load Balance

Website

docs.aws.amazon.com

$ Details

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Categories

#Cloud Computing #Cloud Hosting #Object Storage #Cloud Infrastructure

AWS Lambda features and specs

• Scalability
  AWS Lambda automatically scales your application by running your code in response to each trigger. This means no manual intervention is required to handle varying levels of traffic.
• Cost-effectiveness
  You only pay for the compute time you consume. Billing is metered in increments of 100 milliseconds and you are not charged when your code is not running.
• Reduced Operations Overhead
  AWS Lambda abstracts the infrastructure management layer, so there is no need to manage or provision servers. This allows you to focus more on writing code for your applications.
• Flexibility
  Supports multiple programming languages such as Python, Node.js, Ruby, Java, Go, and .NET, which allows you to use the language you are most comfortable with.
• Integration with Other AWS Services
  Seamlessly integrates with many other AWS services such as S3, DynamoDB, RDS, SNS, and more, making it versatile and highly functional.
• Automatic Scaling and Load Balancing
  Handles thousands of concurrent requests without managing the scaling yourself, making it suitable for applications requiring high availability and reliability.

Possible disadvantages of AWS Lambda

• Cold Start Latency
  The first request to a Lambda function after it has been idle for a certain period can take longer to execute. This is referred to as a 'cold start' and can impact performance.
• Resource Limits
  Lambda has defined limits, such as a maximum execution timeout of 15 minutes, memory allocation ranging from 128 MB to 10,240 MB, and temporary storage up to 512 MB.
• Vendor Lock-in
  Using AWS Lambda ties you into the AWS ecosystem, making it difficult to migrate to another cloud provider or an on-premises solution without significant modifications to your application.
• Complexity of Debugging
  Debugging and monitoring distributed, serverless applications can be more complex compared to traditional applications due to the lack of direct access to the underlying infrastructure.
• Cold Start Issues with VPC
  When Lambda functions are configured to access resources within a Virtual Private Cloud (VPC), the cold start latency can be exacerbated due to additional VPC networking overhead.
• Limited Execution Control
  AWS Lambda is designed for stateless, short-running tasks and may not be suitable for long-running processes or tasks requiring complex orchestration.

Application Load Balance features and specs

• Layer 7 Processing
  Application Load Balancer operates at the application layer (Layer 7), allowing it to make routing decisions based on advanced content-based rules, such as the HTTP headers, request URL, and query string.
• Advanced Routing
  ALB supports dynamic host-based and path-based routing, enabling requests to be dispatched to different backend services based on the URL pattern or the host domain, which is particularly useful for microservices architectures.
• WebSocket and HTTP/2 Support
  Supports sticky sessions and WebSocket, allowing for long-lived sessions and bidirectional communication between clients and servers. It also supports HTTP/2, providing improved performance over HTTP/1.1.
• Integrated Security Features
  ALB integrates with AWS WAF (Web Application Firewall) to secure applications and protect against common web exploits. It also supports TLS offloading, simplifying encryption management.
• Monitoring and Logging
  Offers detailed CloudWatch metrics and logs to monitor traffic patterns, latency, and other critical operational details. This helps in proactively troubleshooting and optimizing performance.

Possible disadvantages of Application Load Balance

• Complex Configuration
  Setting up and configuring ALB might be more complex compared to Network Load Balancers or Classic Load Balancers, especially with intricate routing and security rules.
• Higher Costs
  Application Load Balancers can be more expensive due to advanced features and capabilities, particularly when handling high traffic levels, compared to simpler load balancing solutions.
• Limited Protocol Support
  ALB is primarily designed for HTTP/HTTPS traffic and may not be suitable if your application needs to handle TCP/UDP-based protocols directly.
• Performance Overhead
  Operating at Layer 7 can introduce slight latency due to the additional processing required for content-based routing and SSL termination.

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