Amazon Machine Images (AMI) -solutions.com



Elastic IP Addresses. An Elastic IP address is a static IPv4 address designed for dynamic cloud computing. An Elastic IP address is associated with your AWS account. With an Elastic IP address, you can mask the failure of an instance or software by rapidly remapping the address to another instance in your account.=================================================Spot Instance : - Spot Instances enable you to bid on unused EC2 instances, which can lower your Amazon EC2 costs significantly. The hourly price for a Spot Instance (of each instance type in each Availability Zone) is set by Amazon EC2, and fluctuates depending on the supply of and demand for Spot Instances.=================================================A Reserved Instance is a reservation of resources and capacity, for either one or three years, for a particular Availability Zone within a region. Unlike on- demand, when you purchase a reservation, you commit to paying for all of the hours of the 1- or 3-year term; in exchange, the hourly rate is lowered significantly.================================================An Amazon EC2 Dedicated host is a physical server with EC2 instance capacity dedicated for your use and allows you to reliably launch EC2 instances on the same Dedicated host over time. You have visibility over how your Dedicated hosts are utilized and you can determine how many sockets and cores are installed on the server. These features allow you to minimize licensing costs in a bring-your-own-license (BYOL) scenario and help you address corporate compliance and regulatory requirements.Amazon Machine Images (AMI)An Amazon Machine Image (AMI) provides the information required to launch an instance, which is a virtual server in the cloud. You specify an AMI when you launch an instance, and you can launch as many instances from the AMI as you need. You can also launch instances from as many different AMIs as you need.An AMI includes the following:A template for the root volume for the instance (for example, an operating system, an application server, and applications)Launch permissions that control which AWS accounts can use the AMI to launch instancesA block device mapping that specifies the volumes to attach to the instance when it's launched (contain mapping information of drives)AMIs : - it is like a templete which is work like software image.An Amazon Machine Image (AMI) is a special type of virtual appliance that is used to create a virtual machine within the Amazon Elastic Compute Cloud ("EC2"). It serves as the basic unit of deployment for services delivered using EC2.The Amazon Linux AMI is a supported and maintained Linux image provided by Amazon Web Services for use on Amazon Elastic Compute Cloud (Amazon EC2). It is designed to provide a stable, secure, and high performance execution environment for applications running on Amazon EC2.You can also launch instances from as many different AMIs as you need. An AMI includes the following: A template for the root volume for the instance (for example, an operating system, an application server, and applications) Launch permissions that control which AWS accounts can use the AMI to launch instances.=====================================================What Is a Classic Load Balancer?Elastic Load Balancing distributes incoming application traffic across multiple EC2 instances, in multiple Availability Zones. ... You can configure health checks, which are used to monitor the health of the registered instances so that the load balancer can send requests only to the healthy instances.Elastic Load Balancing automatically distributes incoming application traffic across multiple Amazon EC2 instances. It enables you to achieve fault tolerance in your applications, seamlessly providing the required amount of load balancing capacity needed to route application traffic.Elastic Load Balancing distributes incoming application traffic across multiple EC2 instances, in multiple Availability Zones. ... You can configure health checks, which are used to monitor the health of the registered instances so that the load balancer can send requests only to the healthy instances.===========================================================Elastic Load Balancing supports three types of load balancers: Application Load Balancers, Network Load Balancers, and Classic Load BalancersClassic Load Balancer OverviewA load balancer distributes incoming application traffic across multiple EC2 instances in multiple Availability Zones. This increases the fault tolerance of your applications. Elastic Load Balancing detects unhealthy instances and routes traffic only to healthy instances.Your load balancer serves as a single point of contact for clients. This increases the availability of your application. You can add and remove instances from your load balancer as your needs change, without disrupting the overall flow of requests to your application. Elastic Load Balancing scales your load balancer as traffic to your application changes over time. Elastic Load Balancing can scale to the vast majority of workloads automatically.A listener checks for connection requests from clients, using the protocol and port that you configure, and forwards requests to one or more registered instances using the protocol and port number that you configure. You add one or more listeners to your load balancer.You can configure health checks, which are used to monitor the health of the registered instances so that the load balancer only sends requests to the healthy instances.To ensure that your registered instances are able to handle the request load in each Availability Zone, it is important to keep approximately the same number of instances in each Availability Zone registered with the load balancer. For example, if you have ten instances in Availability Zone us-west-2a and two instances in us-west-2b, the requests are distributed evenly between the two Availability Zones. As a result, the two instances in us-west-2b serve the same amount of traffic as the ten instances in us-west-2a. Instead, you should have six instances in each Availability Zone.By default, the load balancer distributes traffic evenly across the Availability Zones that you enable for your load balancer. To distribute traffic evenly across all registered instances in all enabled Availability Zones, enable?cross-zone load balancing?on your load balancer. However, we still recommend that you maintain approximately equivalent numbers of instances in each Availability Zone for better fault tolerance.Elastic Block storage : - add drive into the instance is called elastic block storage. Example adding d drive,e drive in windows plateform.root drive automatically installed like c drive when we install the window software. ................
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