Snapshots vs Custom Images Use Cases | Generated by AI
Question: Why do people use snapshots instead of custom images, or vice versa, in DigitalOcean or AMD Developer Cloud?
Answer:
The choice between snapshots and custom images depends on purpose, flexibility, cost, and workflow. Here’s a breakdown:
1. Snapshots
- Definition: A snapshot is a point-in-time copy of an existing Droplet (VM) or volume.
- Use Case: Ideal for backups, quick rollback, or short-term cloning.
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Pros:
- Fast to create directly from an existing Droplet.
- Useful for disaster recovery or incremental updates.
- Can capture the current running state, including data changes.
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Cons:
- Usually tied to the specific cloud provider.
- Less flexible for sharing or reusing across projects or accounts.
- Cost accumulates if you keep many snapshots.
2. Custom Images
- Definition: A custom image is a reusable OS or application environment uploaded or created for repeated deployment.
- Use Case: Ideal for standardizing environments across multiple Droplets or teams.
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Pros:
- Portable between projects or sometimes even between providers.
- Great for scaling: deploy multiple Droplets with the exact same setup.
- Can be created from snapshots, ISO, or other sources.
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Cons:
- Slightly more setup overhead initially.
- Does not automatically include incremental updates—you’d need to update the custom image manually.
3. Decision Factors
- Temporary vs Permanent: Snapshots are for quick backup or replication; custom images are for long-term, reusable templates.
- Frequency of Deployment: If deploying one Droplet once, snapshots are simpler. For repeated deployments, custom images are better.
- Portability Needs: Custom images can be exported/imported across regions or providers more easily than snapshots.
- Cost Sensitivity: Snapshots are billed based on storage size and frequency. Custom images may have similar costs but provide efficiency in large-scale deployment.
Example Scenario:
- You make changes on a Droplet and want to save the current state → take a snapshot.
- You develop a standard stack for multiple projects → save it as a custom image for repeated deployments.
In short: snapshots = state capture, custom images = reusable templates. Often, teams use snapshots to create custom images, combining both advantages.
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