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Enhancing data protection with Cloud-PBS: introducing storage synchronization

How Cloud-PBS synchronizes your Proxmox Backup Server data with object storage for enhanced redundancy and data protection.

By Emmanuel · Updated August 6, 2025
Enhancing data protection with Cloud-PBS: introducing storage synchronization

Data protection is about layers. While Proxmox Backup Server provides excellent backup capabilities, having a single copy of your backups is still a risk. That’s why Cloud-PBS includes automatic storage synchronization to object storage.

What is storage synchronization?

Cloud-PBS automatically replicates your backup data from the primary PBS storage to redundant object storage. This creates an additional copy of your backups on a different storage tier, providing protection against:

  • Primary storage hardware failure
  • Data corruption
  • Localized infrastructure issues

How it works

  1. Your Proxmox VE servers back up to your Cloud-PBS instance (primary PBS storage)
  2. Cloud-PBS automatically synchronizes backup data to object storage
  3. The synchronization runs continuously in the background
  4. Both copies are verified for integrity

Benefits

Enhanced durability

Object storage is designed for extreme durability (typically 99.999999999% — “11 nines”). Your backup data benefits from this level of protection without any additional configuration.

Transparent operation

Synchronization happens automatically. You don’t need to configure anything — it’s part of the Cloud-PBS service.

Cost-effective redundancy

Adding a second copy of your backups on your own infrastructure would require additional hardware and management. Cloud-PBS includes this redundancy in the service.

Combined with client-side encryption

When you use client-side encryption, both the primary and object storage copies are encrypted. This means your data is protected regardless of which storage layer it resides on.

Start using Cloud-PBS

Create your account and benefit from automatic storage synchronization as part of the Cloud-PBS service.

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