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Date: Fri, 10 Jul 2020 15:41:26 +0200 (CEST)
From: Dietmar Maurer <dietmar@proxmox.com>
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Subject: Re: [PVE-User] Proxmox Backup Server (beta)
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> Are you planning to support also CEPH (or other distributed file 
> systems) as destination storage backend?

It is already possible to put the datastore a a mounted cephfs, or 
anything you can mount on the host.

But this means that you copy data over the network multiple times, 
so this is not the best option performance wise...