What is the difference between S3 and EBS?
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What is the difference between S3 and EBS?
Amazon S3 (Simple Storage Service):
Amazon S3 is an object storage service designed to store and retrieve any amount of data from anywhere on the internet. It stores data as objects within buckets, where each object consists of the data itself, a unique identifier (key), and metadata. S3 is ideal for unstructured data such as media files, backups, log files, and big data. It is highly scalable, durable, and accessible via APIs, making it suitable for cloud-native applications and data lakes. S3 is designed for write-once, read-many use cases and supports features like versioning, lifecycle policies, and encryption.
Amazon EBS (Elastic Block Store):
Amazon EBS provides block-level storage volumes that can be attached to Amazon EC2 instances. It functions like a virtual hard drive and is used for structured data storage, such as operating systems, databases, or applications requiring frequent read/write access. Each EBS volume is associated with a specific EC2 instance and must reside in the same availability zone. EBS offers persistent storage—data is retained even after the instance is stopped—and supports snapshot backups to S3. It is suitable for workloads needing low-latency access, file systems, or databases.
Key Theoretical Differences:
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Storage Model:
S3 uses object storage, while EBS uses block storage. -
Access Method:
S3 is accessed via web APIs, suitable for distributed access; EBS is mounted to EC2 and accessed as a disk. -
Use Cases:
S3 is ideal for archival, media storage, and backups; EBS is used for running OS, applications, and databases. -
Durability & Scalability:
S3 is more durable and automatically scalable; EBS needs manual provisioning and is tied to EC2.
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