AWS Auto Scaling: Scaling and Load Balancing Essentials
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Questions and Answers

What was the primary challenge with infrastructure management before AWS Auto Scaling?

  • Optimizing for cost or performance
  • Maintaining application performance
  • Managing the infrastructure
  • Purchasing infrastructure upfront (correct)

    • What is the primary benefit of using AWS Auto Scaling for application resources?

  • Better fault tolerance and cost management
  • Improved reliability and scalability
  • Enhanced flexibility and predictability
  • All of the above (correct)

    • What is the key difference between a snapshot and an AMI?

  • Snapshots are backups of an EC2 instance, whereas AMIs are backups of a single EBS volume
  • Snapshots are backups of a single EBS volume, whereas AMIs are backups of an EC2 instance (correct)
  • Snapshots are bootable images on EBS volumes, whereas AMIs are non-bootable images on EC2 instances
  • Snapshots are non-bootable images on EC2 instances, whereas AMIs are bootable images on EBS volumes

    • What is the purpose of dynamic scaling in AWS Auto Scaling?

    <p>Guides the service on how to optimize resources for availability and price</p> Signup and view all the answers

    What is the primary purpose of a load balancer in Auto Scaling?

    <p>To distribute the load across multiple instances</p> Signup and view all the answers

    What is the main difference between Classic Load Balancer and Application Load Balancer?

    <p>One supports host-based routing and the other does not</p> Signup and view all the answers

    What is the result of creating an AMI image?

    <p>Creates an EBS snapshot</p> Signup and view all the answers

    What is the purpose of predictive scaling in AWS Auto Scaling?

    <p>Predicts future workload based on daily and weekly trends and regular forecast future network traffic</p> Signup and view all the answers

    What is the purpose of a key pair in Auto Scaling?

    <p>To use with all instances in the Auto Scaling group</p> Signup and view all the answers

    What is the minimum information required to create an Auto Scaling group?

    <p>Launch configuration, group name, and key pair</p> Signup and view all the answers

    What can be used as a metric for scaling in Auto Scaling?

    <p>Average CPU Utilization</p> Signup and view all the answers

    What can be used to notify users when a new instance is initiated in Auto Scaling?

    <p>SNS (Simple Notification Service)</p> Signup and view all the answers

    What is the primary function of a Network Load Balancer in AWS?

    <p>Managing massive traffic and low latencies</p> Signup and view all the answers

    What is the requirement for creating a new security group with Auto Scaling?

    <p>Opening the SSH port and making it accessible from anywhere</p> Signup and view all the answers

    What is the primary advantage of using AWS Auto Scaling for application resources?

    <p>Achieving cost optimization through automatic scaling</p> Signup and view all the answers

    What is the purpose of specifying the availability zones when creating an Auto Scaling group?

    <p>To ensure instances are launched in multiple zones within a region</p> Signup and view all the answers

    What is the main difference between snapshots and AMIs?

    <p>Snapshots are backups of EBS volumes, while AMIs are backups of EC2 instances</p> Signup and view all the answers

    Which of the following is a benefit of using AWS Auto Scaling?

    <p>Better fault tolerance</p> Signup and view all the answers

    What is the role of the key pair in an Auto Scaling group?

    <p>To use with all instances part of the Auto Scaling group</p> Signup and view all the answers

    What is the benefit of using tags in an Auto Scaling group?

    <p>To identify instances or their purpose</p> Signup and view all the answers

    What is the purpose of dynamic scaling in AWS Auto Scaling?

    <p>Guiding the service on how to optimize resources for availability and price</p> Signup and view all the answers

    What is the outcome of creating an Auto Scaling group?

    <p>Instances are launched automatically by the Auto Scaling group</p> Signup and view all the answers

    What is required to use AWS Auto Scaling?

    <p>Configuring a single unified scaling policy for application resources</p> Signup and view all the answers

    What is the advantage of automatic scaling in AWS Auto Scaling?

    <p>Maintaining application performance at the lowest possible price</p> Signup and view all the answers

    Study Notes

    Here is a summary of the text in detailed bullet points:

    • Before AWS Auto Scaling, enterprises had to purchase infrastructure upfront, which was a one-time cost, and they had to manage the infrastructure themselves, which was a burden.

    • With AWS Auto Scaling, the application performance is maintained based on user requirements at the lowest possible price, and the cost optimization is achieved through automatic scaling.

    • AWS Auto Scaling is a service that helps users monitor their applications and servers, and automatically adjusts the capacity of their infrastructure to maintain steadiness.

    • The benefits of Auto Scaling include better fault tolerance, better cost management, reliability, scalability, and flexibility.

    • Snapshots are backups of a single EBS volume, whereas AMIs are backups of an EC2 instance only.

    • Snapshots are non-bootable images on EBS volumes, whereas AMIs are bootable images on EC2 instances.

    • Creating an AMI image also creates EBS snapshots.

    • To use AWS Auto Scaling, users need to configure a single unified scaling policy for application resources, select the service to scale, and optimize for cost or performance.

    • There are different scaling plans, including dynamic scaling and predictive scaling.

    • Dynamic scaling guides the service on how to optimize resources for availability and price.

    • Predictive scaling predicts future workload based on daily and weekly trends and regular forecast future network traffic.

    • Load balancers are necessary with Auto Scaling to distribute the load across multiple instances.

    • There are three types of load balancers on AWS: Classic Load Balancer, Application Load Balancer, and Network Load Balancer.

    • Classic Load Balancer is a primitive load balancer that is based on IP address and TCP port, and does not support host-based routing.

    • Application Load Balancer performs tasks at the application level, supports host-based and path-based routing, and is used for HTTP and HTTPS traffic routing.

    • Network Load Balancer performs tasks at layer 4 of the connection level, routes TCP traffic, and is suitable for managing massive traffic and low latencies.

    • To create an Auto Scaling group, users need to create a launch configuration, select an Amazon Linux AMI, configure details, and specify the key pair.

    • Users can create a new security group with the SSH port opened and accessible from anywhere.

    • The key pair is used with all instances that are part of the Auto Scaling group.

    • Users can select an existing key pair or create a new one.

    • After creating the launch configuration, users can create an Auto Scaling group, specify the group name, group size, network, and availability zones.

    • Users can configure scaling policies, including scaling between a minimum and maximum number of instances, and specifying the condition for scaling up or down.

    • Users can use Average CPU Utilization as a metric for scaling, and specify a target value as a threshold for scaling up or down.

    • Users can add notifications using SNS (Simple Notification Service) and get notified when a new instance is initiated.

    • Tags are not mandatory but can be used to identify instances or their purpose.

    • After creating the Auto Scaling group, users can verify the instance details and see that the instance has been initiated automatically by the Auto Scaling group.

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    Description

    Test your knowledge on the fundamentals of AWS Auto Scaling, including its benefits, scaling plans, and load balancing. Learn how to configure Auto Scaling groups, launch configurations, and scaling policies to optimize your application performance and cost.

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