Question about using namespaces in Proxmox Backup Server with multiple PVE clusters

[pvpaulo]

Hello, good afternoon everyone.

Could you please help me clarify a question?

I currently have a Proxmox Backup Server (PBS) properly configured, with a datastore named BKP.
I have one Proxmox VE (PVE) cluster that is already storing its backups in this BKP datastore, using the default namespace (root).

I am now in the process of creating a second PVE cluster, and I would like to use the same BKP datastore on the PBS to store its backups.

In this context, I have a few questions:

1. If I mount the BKP datastore on the second PVE cluster using the default (root) namespace, could this cause any issues or even corrupt the existing backups?
2. If I create a new namespace for the second PVE cluster, would there be any problems considering that the first cluster will continue writing backups to the root namespace?
3. When creating a new namespace, it is necessary to select the parent namespace (root). Could this hierarchy cause any impact or risk to the existing backups stored in the default namespace?
4. Is it safe to keep:
   
   • Cluster 01 writing backups to the root namespace, and
   • Cluster 02 writing backups to a new namespace created under root?

Or would the ideal scenario be:

• To create two separate namespaces,
• And assign one exclusive namespace to each cluster,
  considering that there are already backups stored in the default (root) namespace and that I cannot afford to lose them?

Thank you very much in advance for your help and guidance.

Best regards,