Which AWS service can automatically scale the number of EC2 instances for your application?
Amazon EC2 Auto Scaling helps you ensure that you have the correct number of Amazon EC2 instances available to handle the load for your application. You create collections of EC2 instances, called Auto Scaling groups. You can specify the minimum number of instances in each Auto Scaling group, and Amazon EC2 Auto Scaling ensures that your group never goes below this size. You can specify the maximum number of instances in each Auto Scaling group, and Amazon EC2 Auto Scaling ensures that your group never goes above this size. If you specify the desired capacity, either when you create the group or at any time thereafter, Amazon EC2 Auto Scaling ensures that your group has this many instances. If you specify scaling policies, then Amazon EC2 Auto Scaling can launch or terminate instances as demand on your application increases or decreases. Show
For example, the following Auto Scaling group has a minimum size of one instance, a desired capacity of two instances, and a maximum size of four instances. The scaling policies that you define adjust the number of instances, within your minimum and maximum number of instances, based on the criteria that you specify. For more information about the benefits of Amazon EC2 Auto Scaling, see Amazon EC2 Auto Scaling benefits. Auto Scaling componentsThe following table describes the key components of Amazon EC2 Auto Scaling.
Pricing for Amazon EC2 Auto ScalingThere are no additional fees with Amazon EC2 Auto Scaling, so it's easy to try it out and see how it can benefit your Amazon architecture. You only pay for the Amazon resources (for example, EC2 instances, EBS volumes, and CloudWatch alarms) that you use. Get startedTo begin, complete the Get started with Amazon EC2 Auto Scaling tutorial to create an Auto Scaling group and see how it responds when an instance in that group terminates. To automatically distribute incoming application traffic across multiple instances in your Auto Scaling group, use Elastic Load Balancing. For more information, see Use Elastic Load Balancing to distribute traffic across the instances in your Auto Scaling group. To monitor your Auto Scaling groups and instance utilization data, use Amazon CloudWatch. For more information, see Monitor CloudWatch metrics for your Auto Scaling groups and instances. To configure auto scaling for scalable resources for Amazon Web Services beyond Amazon EC2, see the Application Auto Scaling User Guide. Work with Auto Scaling groupsYou can create, access, and manage your Auto Scaling groups using any of the following interfaces:
To connect programmatically to an Amazon Web Service, you use an endpoint. For information about endpoints for calls to Amazon EC2 Auto Scaling, see Endpoints and ARNs for Amazon Web Services in China in the Getting Started with Amazon Web Services in China. Which AWS services can scale automatically?AWS Auto Scaling provides a simple, powerful user interface that lets you build scaling plans for Amazon EC2 instances and Spot Fleets, Amazon ECS tasks, Amazon DynamoDB tables, and Amazon Aurora Replicas.
Which AWS service is used to automatically scale Amazon EC2 capacity up or down?Amazon EC2 Auto Scaling helps you maintain application availability through fleet management for EC2 instances, which detects and replaces unhealthy instances, and by scaling your Amazon EC2 capacity up or down automatically according to conditions you define.
Which services work together to enable Auto Scaling of EC2 instances?If you're already using Amazon EC2 Auto Scaling to dynamically scale your Amazon EC2 instances, you can now combine it with AWS Auto Scaling to scale additional resources for other AWS services. With AWS Auto Scaling, your applications always have the right resources at the right time.
Which of the following is a way to use Amazon EC2 Auto Scaling groups to scale capacity in the AWS cloud?If you specify scaling policies, then Amazon EC2 Auto Scaling can launch or terminate instances as demand on your application increases or decreases. For example, the following Auto Scaling group has a minimum size of one instance, a desired capacity of two instances, and a maximum size of four instances.
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