@Forza
Thank you for your answer. If I take the "EPYC-path": Did you ever see, that a 2P-system is slower, than its 1P-pendant?

I am using USB-servers from SEH and Silex. Both of them are working.

Silex can provide higher Performance - SEH is IMHO nicer for license-dongels, etc.

@sumansahabd
Its an LVM-repository. To replicate, you need a snapshot first. A snapshot needs at least 2x the size of the volume on the repository.

Please check, if this is really the case. If you have a VHD which consumes 51% of the SR, you are not able to snapshot/replicate.

@florent
Sorry, but next issue:
Backup size is always shown as 122 KiB although, there are 4GB saved to the remote.

If I save to a storage without "many-files"-seting, 4 GiB is shown

@florent
My problem seems to be, that NBD is not getting activated/tried:

Dec 27 09:35:59 XOA xo-server[6477]: 2022-12-27T08:35:59.951Z xo:backups:DeltaBackupWriter INFO use nbd is NOT activated

...although:

• useNbd = true is set
• Backup-Remote is an SMB-share wir the setting "Store backup as multiple data blocks instead of a whole VHD file. (creates 500-1000 files per backed up TB but allows faster merge) "
• NBD-network is activated on one interface, XO and XCP-ng can work with

Is there any other dependency, that stops NBD from getting used?

Just if somebody else is searching for the same thing, although it is not directly related to XOA:

If you want to get these alerts by mail and you are not using XCP-ng-Center, you can activate them with:

xe pool-param-set uuid=pool-uuid other-config:mail-destination=mail@example.com
xe pool-param-set uuid=pool-uuid other-config:ssmtp-mailhub=mailserverip:port

KPS

That's quite interesting!

It makes sense, that the scheduler "rotates" the load over the cores, but it wonders me, that the "single-threaded-load" of the VM is not shown on the whole system.

Shouldn't one core be at least at 75%, if one core in the VM is at 75%?

I am using USB-servers from SEH and Silex. Both of them are working.

Silex can provide higher Performance - SEH is IMHO nicer for license-dongels, etc.

Hi!

I am trying to find out which backups are located on a specific remote.
Can you give me a hint on how to filter the results to see only backups of one remote, or to see at least the remote-name as colunn?

Thank you for your help!
KPS

@olivierlambert
There are lots of messages about:

unable to parse XAPI datetime "2023-03-01T12:41:47.000Z"

But nothing about the upgrade process.

I was able to upgrade hosts 2+3 without any problem - but not automatically

Hi!

I did just start the RPU on a pool with 3 XCP-ng 8.2.1 hosts. XOA is running on 5.80, XCP-ng servers have been fully patched 2 weeks ago --> 14 patches missing.

The upgrade did start with the master (successful).
The second node did get evacuated, but did then wait with no more VMs on it with the sign: "Reboot to apply patches".

Shouldn't this be done automatically?
The third host did not update at all. I had to restart patch and reboot.

Thank you and best wishes
KPS

@olivierlambert
So, 75% of one core is 75% of one core, but the time-resolution of the graph and the rotation over the physical cores makes this "hidden"?

That's quite interesting!

It makes sense, that the scheduler "rotates" the load over the cores, but it wonders me, that the "single-threaded-load" of the VM is not shown on the whole system.

Shouldn't one core be at least at 75%, if one core in the VM is at 75%?

Hi!

What is the best method to manage a cluster with XOA?

If I only add the IP of the master node, the whole cluster disappears, if the master fails, although HA did evaluate a new clusterr.

What is "best-practice"? Should I also add the other nodes, although they are showing up a "connection failed"?

Thank you for your help
KPS

Hi!

I did my first migration: Everything looks good!

The only thing, that should be noted:
You need to provide the VM-ID in your script. The ID that is shown through vSphere was not valid for your script. I had to login the the current ESXi-host and to get the ID with:

vim-cmd vmsvc/getallvms | grep NAME

Hi!

I was able to isolate the issue: It does happen, if NBD is activated on one of the network interfaces!

 xe network-param-remove param-name=purpose param-key=nbd uuid=xxxxxxxx

--> Disabling "useNBD" did not solve the issue. I had to disable the feature in XCP-ng

Hi!

I am having a problem with my XOCE system on commit 317e4, xo-server 5.107.5 and XCP-ng 8.2.

After every run of a delta-backup, there is a VDI, that is attached to the control-domain of one of the XCP-ng-nodes. If I do not manually handle this throug reboot and forget, the snapshot-chain of the VM is getting longer and longer, until no backups are possible.

SMLog is only showing:

Jan 26 07:45:52 xenpool4host1 SM: [7714] ['/sbin/lvchange', '-an', '/dev/VG_XenStorage-9f4a43ca-f00e-f575-4897-9298235982d8/VHD-3c2f0bdc-093d-451b-b19e-7c099e354c13']
Jan 26 07:45:52 xenpool4host1 SM: [7714] lock: released /var/lock/sm/lvm-9f4a43ca-f00e-f575-4897-9298235982d8/3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:45:52 xenpool4host1 SMGC: [7714] Updated the vhd-parent field for child 3c2f0bdc-093d-451b-b19e-7c099e354c13 with d9022d81-2c9f-4f5f-8c7c-0d9e537fc14e
Jan 26 07:45:53 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:46:12 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:46:35 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:46:52 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:47:08 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:48:20 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:48:38 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:48:56 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:49:30 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:49:44 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:50:01 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:51:31 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13
Jan 26 07:52:16 xenpool4host1 SM: [7714] Refresh request for 3c2f0bdc-093d-451b-b19e-7c099e354c13

...every 30s.

Do you have any idea, why this happens and what I can do?

On XOCE, NBD is activated, but not used for that job.

Thank you and best wishes
KPS