Summary
Highlights
Applications require servers of varying sizes and quantities. Traditionally, obtaining servers was a time-consuming and expensive process, often taking weeks or months, involving hardware research, budget approval, purchasing, and physical setup. Once purchased, these servers were a permanent commitment.
Amazon EC2 offers virtual servers (compute instances) in the cloud, enabling quick and inexpensive acquisition. Users can select desired instance types and templates (Windows or Linux) and launch them via the AWS Management Console or API. Instances are ready in minutes with full administrative control, and users only pay for what they use.
Amazon EC2 provides a range of instance types for different use cases, from small, economical options for low-volume applications to cluster compute instances for high-performance computing. Instances are optimized for compute, memory, storage, and GPU processing, allowing users to find the right price and performance. Instances can also be easily resized as business needs change.
EC2 offers flexible pricing: On-Demand (pay-as-you-go with no long-term commitment), Reserved Instances (significant discount for an upfront payment), and Spot Instances (bid on unused capacity for further discounts).
Security is paramount, and EC2 provides built-in features. Instances are located in a Virtual Private Cloud (VPC), a logically isolated and controlled network. VPC offers network security tools to manage access, and users can securely connect to on-premises networks via hardware-based VPN.
EC2 instances offer directly attached temporary storage. For persistent block storage, Amazon Elastic Block Store (EBS) is available, allowing users to provision storage with specific performance levels to meet application demands.
To handle unpredictable demand, Amazon EC2 provides auto-scaling. This feature allows users to define metrics (like CPU utilization or network bandwidth) to automatically increase or decrease the number of running instances, ensuring application demands are met without manual intervention and only paying for necessary resources.
Users can sign up for an AWS account and start using Amazon EC2 in minutes. The AWS Free Tier allows users to try cloud computing for free.