AWS EBS Snapshots

Data is everything in today’s digital world. Whether you’re running a production database, deploying applications, or storing critical business files, losing data is not an option. That’s where AWS EBS Snapshots come in — they act like a safety net for your data.

In this guide, we’ll break down everything you need to know about EBS snapshots in a simple, human-friendly way.

What Are AWS EBS Snapshots?

An EBS Snapshot is a point-in-time backup of your EBS (Elastic Block Store) volume.

Think of it like taking a photo of your storage at a specific moment. You can later use that “photo” to restore data or create new volumes.

👉 Key points:

• Stored in Amazon S3
• Used for backup & recovery
• Helps in data migration and replication

Key Characteristics

• Point-in-time copy of your EBS volume
• Region-specific (not limited to a single Availability Zone)
• Can create new volumes from snapshots
• Snapshot size ≥ original volume size
• AWS limits:
• ~5000 AMIs per account
• ~10,000 snapshots per account

How Do Snapshots Work?

When you create your first snapshot, AWS copies all the data from your EBS volume.

After that, snapshots become incremental.

Incremental Snapshots Explained:

• First snapshot → Full backup
• Next snapshots → Only store changes (delta data)

This makes snapshots:

• Faster
• Storage-efficient
• Cost-effective

Snapshot Lifecycle (Status)

When you create a snapshot:

• Pending → Snapshot is being created
• Completed → Ready to use

Pricing Explained (Simple Example)

AWS charges based on actual data stored, not volume size.

👉 Example:

• Volume size = 100 GiB
• Actual data = 60 GiB
• You pay for 60 GiB only

This is why snapshots are cost-efficient.

Copy & Share Snapshots

Copy Snapshots

• Can copy across regions
• Useful for disaster recovery

Share Snapshots

• Share with other AWS accounts via permissions
• To use a shared snapshot:

1. Copy it to your account
2. Then create a volume from it

⚠️ Note:

• Encrypted snapshots require access to the encryption key
• Without permission → copy may fail silently

Encryption Support

Security is built-in.

• Snapshots can be encrypted
• You can:
• Encrypt during copy
• Re-encrypt with a new key
• Volumes created from encrypted snapshots → also encrypted

Benefits of AWS Snapshots

Automation

Set schedules to automatically take snapshots at regular intervals.

Cost-Effective

Only pay for changed data (incremental storage).

Secure

Supports encryption and key management.

High Availability

Stored in S3 with 11 nines (99.999999999%) durability.

Common Use Cases

Backup & Restore

Quickly recover lost or corrupted data.

Disaster Recovery

Replicate snapshots across regions for failover.

Testing & Development

Create test environments without affecting production.

Step-by-Step: Create an EBS Snapshot

1. Go to EC2 Dashboard
2. Click on Volumes
3. Select your volume
4. Click Actions → Create Snapshot
5. Add description
6. Click Create Snapshot

Then:

• Check the status under the Snapshots tab

AWS CLI Example (Code)

Here’s how you can create a snapshot using AWS CLI:

# Language: Bash (AWS CLI)
aws ec2 create-snapshot \
    --volume-id vol-1234567890abcdef0 \
    --description "My EBS Snapshot Backup"

Python Example (Boto3)

# Language: Python (Boto3)
import boto3
ec2 = boto3.client('ec2')
response = ec2.create_snapshot(
    VolumeId='vol-1234567890abcdef0',
    Description='My EBS Snapshot Backup'
)
print(response)

How to Delete a Snapshot

1. Open EC2 Console
2. Go to Snapshots
3. Select the snapshot
4. Click Actions → Delete
5. Confirm deletion

Pro Tips (Important!)

• Always automate snapshots for production workloads
• Use tags to organize snapshots
• Regularly clean up unused snapshots to save costs
• Enable cross-region copies for critical data

Final Thoughts

AWS EBS Snapshots are one of the simplest yet most powerful tools for data protection in the cloud. Whether you’re a beginner or working on production systems, snapshots help you:

• Prevent data loss
• Reduce downtime
• Optimize storage costs

If you’re building anything serious on AWS, snapshots aren’t optional — they’re essential.