[PVE-User] Proxmox Backup Server (beta)

[Iztok Gregori]

On 10/07/20 15:41, Dietmar Maurer wrote:
>> 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.

Is this "mount" managed by PBS or you have to "manually" mount it 
outside PBS?

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

True, PBS will act as a gateway to the backing storage cluster, but the 
data will be only re-routed to the final destination (in this case and 
OSD) not copied over (putting aside the CEPH replication policy). So 
performance wise you are limited by the bandwidth of the PBS network 
interfaces (as you will be for a local network storage server) and to 
the speed of the backing CEPH cluster. Maybe you will loose something on 
raw performance (but depending on the CEPH cluster you could gain also 
something) but you will gain the ability of "easily" expandable storage 
space and no single point of failure.


Thanks a lot for your work!

Iztok Gregori