AWS EBS Volumes
An AWS EBS volume is a durable, block-level storage device that you can attach to a single EC2 instance. You can use EBS volumes as primary storage for data that requires frequent updates, such as the system drive for an instance or storage for a database application. You can also use them for throughput-intensive applications that perform continuous disk scans. EBS volumes persist independently from the running life of an EC2 instance.
After a volume is attached to an instance, you can use it like any other physical hard drive. EBS volumes are flexible. For current-generation volumes attached to current-generation instance types, you can dynamically increase size, modify the provisioned IOPS capacity, and change volume type on live production volumes.
Amazon EBS provides the following volume types: General Purpose SSD (
gp2), Provisioned IOPS SSD (
io1), Throughput Optimized HDD (
st1), Cold HDD (
sc1), and Magnetic (
standard, a previous-generation type). They differ in performance characteristics and price, allowing you to tailor your storage performance and cost to the needs of your applications.
Amazon Elastic Block Store (Amazon EBS) provides persistent block storage volumes for use with Amazon EC2 instances in the AWS Cloud. Each Amazon EBS volume is automatically replicated within its Availability Zone to protect you from component failure, offering high availability and durability. Amazon EBS volumes offer the consistent and low-latency performance needed to run your workloads. With Amazon EBS, you can scale your usage up or down within minutes – all while paying a low price for only what you provision.