Amazon EBS

Last edited 149 days ago by Kirtan Chavda

Amazon Elastic Block Store (Amazon EBS) provides scalable, high-performance block storage resources that can be used with Amazon Elastic Compute Cloud (Amazon EC2) instances. With Amazon Elastic Block Store, you can create and manage the following block storage resources:

Amazon EBS volumes — These are storage volumes(network-attached storage (NAS) volumes) that you attach to Amazon EC2 instances. After you attach a volume to an instance, you can use it in the same way you would use a local hard drive attached to a computer, for example to store files or to install applications.

Amazon EBS snapshots — These are point-in-time backups of Amazon EBS volumes that persist independently from the volume itself. You can create snapshots to back up the data on your Amazon EBS volumes. You can then restore new volumes from those snapshots at any time.

Features of Amazon EBS

Amazon EBS provides the following features and benefits:

Multiple volume types — Amazon EBS provides multiple volume types that allow you to optimize storage performance and cost for a broad range of applications. Volume types are divided into two major categories: SSD-backed storage for transactional workloads, and HDD-backed storage for throughput intensive workloads.

Scalability — You can create Amazon EBS volumes with capacity and performance specifications that meet your needs. As your needs changes, you can use Elastic Volumes operations to dynamically increase capacity or tune performance, with no downtime.

Backup and recovery — Use Amazon EBS snapshots to back up the data stored on your volumes. You can then use those snapshots to instantly restore volumes or to migrate data across AWS accounts, AWS Regions, or Availability Zones.

Data protection — Use Amazon EBS encryption to encrypt your Amazon EBS volumes and Amazon EBS snapshots. Encryption operations occur on the servers that host Amazon EC2 instances, ensuring the security of both data-at-rest and data-in-transit between an instance and its attached volume and subsequent snapshots.

Data availability and durability — io2 Block Express volumes provide 99.999% durability with an annual failure rate of 0.001%. Other volume types provide 99.8% to 99.9% durability with an annual failure rate of 0.1% to 0.2%. Additionally, volume data is automatically replicated across multiple servers in an Availability Zone to prevent the loss of data from the failure of any single component.

Data archiving — EBS Snapshots Archive provides a low-cost storage tier to archive full, point-in-time copies of EBS Snapshots that you must retain for 90 days or more for regulatory and compliance reasons, or for future project releases.

Characteristics

Persistence: EBS volume data persists independently of the instance's lifecycle.

Attachment: EBS volumes can be attached to EC2 instances and can also be attached to multiple instances with specific constraints.

Termination Protection: Termination protection is turned off by default, but it can be manually enabled to keep the volume/data when the instance is terminated.

Root Volume Behavior: Root EBS volumes are deleted on termination by default, but extra non-boot volumes are not deleted on termination by default. This behavior can be changed using the "DeleteOnTermination" attribute.

Encrypted Volumes: You can create AMIs with encrypted root/boot volumes as well as data volumes, using separate Customer Master Keys (CMKs) per volume.

Volume Management: Volume sizes and types can be upgraded without downtime, except for magnetic standard volumes. Elastic Volumes allow for volume size adjustment, performance adjustment, or volume type change while the volume is in use.

Snapshot and Migration: Volumes can be migrated between Availability Zones by creating a snapshot and then creating a volume in another AZ from the snapshot.

Instance Launch: Each instance launched has an associated root device volume, either an Amazon EBS volume or an instance store volume.

Limitations and Quotas: There are limitations on the number of EBS volumes and snapshots that can be created, with defaults set at 5,000 volumes and 10,000 snapshots.

Deployment:

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Multi-attach:

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Features of Amazon EBS

Characteristics

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