AWS-3

AWS(EC2-2)

Inexpensive
Amazon EC2 passes on to you the financial benefits of Amazon’s scale. You pay a very low
rate for the compute capacity you actually consume. See Amazon EC2 Instance Purchasing
Options for a more detailed description.
• On-Demand Instances – On-Demand Instances let you pay for compute capacity by the hour
with no long-term commitments.
• This frees you from the costs and complexities of planning, purchasing, and maintaining
hardware and transforms what are commonly large fixed costs into much smaller variable costs.
Reserved Instances
• Reserved Instances provide you with a significant discount (up to 75%) compared to On-
Demand Instance pricing.
• There are three Reserved Instance payment options (No Upfront, Partial Upfront, All Upfront)
that enable you to balance the amount you pay upfront with your effective hourly price.
• The Reserved Instance Marketplace is also available, which provides you with the
opportunity to sell Reserved Instances if your needs change.
Examples:
You want to move instances to a new AWS Region, change to a new instance type, or sell
capacity for projects that end before your Reserved Instance term expires).
Spot Instances
• Spot Instances allow customers to bid on unused Amazon EC2 capacity and run those
instances for as long as their bid exceeds the current Spot Price.
To use Amazon EC2, you simply:
• Select a pre-configured, template Amazon Machine Image (AMI) to get up and running immediately. Or create an AMI containing your applications, libraries, data, and associated configuration settings.
• Configure security and network access on your Amazon EC2 instance..
• Choose which instance type(s) you want, then start, terminate, and monitor as many instances
of your AMI as needed, using the web service APIs or the variety of management tools
provided.
• Determine whether you want to run in multiple locations, utilize static IP endpoints, or attach
persistent block storage to your instances.
• Pay only for the resources that you actually consume, like instance-hours or data transfer.
Features 
Amazon EC2 provides a number of powerful features for building scalable, failure resilient,
enterprise class applications.
Amazon Elastic Block Store
• Amazon Elastic Block Store (EBS) offers persistent storage for Amazon EC2 instances.
• Amazon EBS volumes are network-attached, and persist independently from the life of an instance.
• Amazon EBS volumes are highly available, highly reliable volumes that can be leveraged as an Amazon EC2 instance’s boot partition or attached to a running Amazon EC2 instance as a standard block device
EBS-Optimized Instances
• For an additional, low, hourly fee, customers can launch selected Amazon EC2 instances
types as EBS-optimized instances
Multiple Locations
• Amazon EC2 provides the ability to place instances in multiple locations. Amazon EC2 locations are composed of Regions and Availability Zones. Availability Zones are distinct locations that are engineered to be insulated from failures in other Availability Zones and provide inexpensive, low latency network connectivity to other Availability Zones in the same Region. By launching instances in separate Availability Zones, you can protect your applications from failure of a single location. Regions consist of one or more Availability Zones, are geographically dispersed, and will be in separate geographic areas or countries
Elastic IP Addresses
• Elastic IP addresses are static IP addresses designed for dynamic cloud computing. An Elastic IP
address is associated with your account not a particular instance, and you control that address until you choose to explicitly release it. Unlike traditional static IP addresses, however, Elastic IP addresses allow you to mask instance or Availability Zone failures by programmatically remapping your public IP addresses to any instance in your account