description Amazon EBS Snapshots Overview
EBS Snapshots are the primary way to back up block storage volumes for EC2 instances. They provide point-in-time copies of your data that can be used to recreate volumes in different Availability Zones or Regions. When combined with EBS Fast Snapshot Restore, they allow for rapid recovery of large volumes during a disaster scenario.
help Amazon EBS Snapshots FAQ
Are Amazon EBS Snapshots full backups or incremental backups?
EBS Snapshots are incremental after the first snapshot, so AWS only stores the changed blocks needed to reconstruct the volume. They are still point-in-time backups of an EBS volume and can be used to create a new volume later.
Can an EBS Snapshot be restored in another AWS Region?
Yes, snapshots can be copied across AWS Regions, which is a common disaster recovery pattern for EC2 workloads. After copying, you can create an EBS volume from that snapshot in the destination Region.
What is Fast Snapshot Restore for EBS Snapshots?
Fast Snapshot Restore, or FSR, pre-warms a snapshot so volumes created from it deliver full performance immediately. Without FSR, a newly restored EBS volume may have lazy-loaded blocks the first time they are read.
How do EBS Snapshots relate to AMIs?
An Amazon Machine Image for an EBS-backed EC2 instance usually references one or more EBS Snapshots. The AMI stores the instance launch metadata, while the snapshots contain the block data for the root and attached volumes.
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