Your backup is a stream, doing backupressure (or not). As explained in the linked topic, it depends on dozens of different parameters.

You might try to use NBD with 4 concurrent download, that might be better though, because I'm betting your bottleneck is likely XAPI export speed.

They are able, but not at a great speed. It doesn't matter how many cores, it's likely heavily single threaded and relying on how fast you can do many efficient instructions per cycle. That's why you should switch to CR.

Ping @florent

Depending on the size of your backup repo you can copy the whole disk repo to tape with tar. So you have a desaster-backup.
You can also span mutiple tapes with tar.

https://www.gnu.org/software/tar/manual/html_section/Using-Multiple-Tapes.html

You shouldn't run anything other than the last commit as possible (which is de934ec609b1bfb48cd598de8b096a6b4cf1f963 now).

At a certain point, I don't know when because we are talking about a home lab here.
I could attach the USB HDD same as a virtual HDD and I could put exclusions on it

Question/suggestion to @julien-f and @florent

Hi,

See https://github.com/vatesfr/xen-orchestra/issues/7569

ep1p created this issue in vatesfr/xen-orchestra closed Backup of metadata is missing settings options for reporting failures. #7569

@Danp Yup. I did miss it... and you were right. Thanks!

@archw
Ignore that entire post...user error. I have two networks that are spelled very close to the same thing and I was using the wrong one.

@olivierlambert Well, last night the backup completed just fine despite me taking no action.

I updated the XO to the latest commit when I got in this morning so hopefully the issue I had back in June don't come back.

@rtjdamen NBD scales relatively well, yes.

Question for @florent

Hi @florent, also [NOBAK] marked disks are transfered and snapshot not removed. In Delta mode backups. Thanks!

Please report any CBT issues in the dedicated thread: https://xcp-ng.org/forum/topic/9268/cbt-the-thread-to-centralize-your-feedback

@florent Here is the log from that job. 2024-06-27T18_11_00.579Z - backup NG.json.txt

@tjkreidl Gotcha and thanks!. In our scenario we wouldn't have a VM on more than one SR but I understand that some people would.

The answer is yes. A fresh XO installation (or XOA deploy) that you will connect to your previous backup repository, will be able to restore everything from scratch.

@fesch

In the words of Ronald Reagan "I don't recall the answer to that question" 🙂

If I remember correctly (subject to the after effects of many happy hours since 5-12-24), I ended up rebooting the host that had that VM. It has never done it since.

Arch