Thank you every visitors and for those who did not had the chance to visit fosdem check this report:
https://xcp-ng.org/blog/2026/02/19/fosdem-2026-follow-up/
[image: vates-xcp-ng-at-fosdem-2026-1.webp]
One question, I promised to forward to the forum, how many VM are you running on XCP-ng ?
Dozen, hundreds, thousands or more ?
@afmart_dei
I had similar issues recently. But not exacly the same. I was able to add second host to pool but was not able to work because in my case eth0 was host managment, eth4 storage, eth5 migration, eth 7 vm network. My second host at the time did not have eht7
Then i further messed myself up by using second host as its own pool attached to same storage and when down hill form there, but was an easy fix.
@acebmxer @ronivay stumbled upon this too
https://github.com/ronivay/XenOrchestraInstallerUpdater#backup-proxy
Backup proxy
Proxy installation method is experimental, use at your own risk. Proxy installation from sources is not documented by Xen Orchestra team. Method used here is the outcome of trial and error.
Proxy source code will be edited slightly to disable license check which only works with official XOA and there is no documented or working procedure to bypass it properly (there used to be but not anymore)
Difficile de parler de « réalité » avec les benchmarks. Vérifiez aussi l'iodepth (qui dépend du type matériel que vous avez, sur du flash/NVMe vous pouvez monter à 128 ou 256), la latence entre en compte aussi bien sûr.
Le bottleneck principal est le monothreading de tapdisk, si vous testez sur plusieurs VMs différentes la somme va monter de manière assez régulière.
