NBD connection during backup

[olivierlambert]

Are you sure XO is using that network?

[manilx]

@olivierlambert Pretty sure. I forced it to use that. In the pool Advanced tab (actually this is the only one I can choose from, the VM network is not shown):

[manilx]

@manilx P.S: I have only 2 networks. Management and VM and both had NBD on.

XO VM is using VM network. Should I put it on the management one?

[manilx]

@manilx Tested putting XO on the Management network. Same result, backups do not use NBD...

[olivierlambert]

Remove the "backup network" entry to leave it as default, check that XO is connected in Settings/server to that mgmt IP of the host and try again.

[Tristis Oris]

that looks similar my problem https://xcp-ng.org/forum/topic/8336/nbd-setup-no-such-item

[manilx]

@olivierlambert Did that. No change.

[olivierlambert]

Maybe @florent will know

[manilx]

@olivierlambert Here are the respective screenshots:

[manilx]

@manilx Found it.

The backup I had was "backup" not "delta".

Choosing delta and Advanced settings I can turn on NBD:

Turned on and all is well. Sorry for the confusion. My bad.

Backup speed doubled.

[olivierlambert]

Ahhh !! Great news I missed it myself, so no worries. So you went from which speed to which?

[manilx]

@olivierlambert 50-80MB/s to up to 160/180

[olivierlambert]

Nice speed increase! Probably also with less CPU load on the Dom0 at the same time

[manilx]

@olivierlambert Haven't checked the CPU as CPU is never a problem on my load
But yes this speed is a lot better so I can backup more frequently (every 2hrs for the important VM's)

Actually the speed on my homelab is faster than the ones we get at the enterprise with "real" hardware.