Understanding Amazon EBS: Persistent Block Storage for EC2
A quick guide to Amazon EBS, explaining how block storage works with EC2 instances and why it is essential for persistent cloud storage.
What is Amazon EBS?
Amazon Elastic Block Store (EBS) is an easy-to-use, high-performance block storage service designed for use with Amazon EC2.
Think of an EBS volume as a virtual hard drive attached to a physical computer. Unlike instance store volumes (which lose data when an EC2 instance stops), EBS provides persistent storage—your data remains safe even when the attached server turns off.
Key Features of Amazon EBS
- Data Persistence: Storage lives independently from the EC2 instance lifecycle, preventing data loss during instance reboots or stops.
- Point-in-Time Snapshots: Easily back up your volumes to Amazon S3 using EBS Snapshots for disaster recovery.
- High Availability & Durability: EBS volumes are automatically replicated within an Availability Zone (AZ) to protect against hardware failures.
- Elastic Volumes: Dynamically resize volume capacity or change performance types (e.g., upgrading from
gp2togp3) with zero downtime.
Common Use Cases
- Relational & NoSQL Databases: High-performance storage for databases like PostgreSQL, MySQL, and MongoDB.
- Enterprise Applications: Running critical business applications requiring reliable, continuous storage.
- Data Analytics Engines: Storing raw operational data for real-time processing pipelines.
Summary
Amazon EBS provides scalable, persistent, and high-performance block storage for EC2 workloads. Combining EBS with backup strategies like snapshots ensures your cloud infrastructure stays durable, reliable, and production-ready.
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