I'm not aware of any issue to live migrate XOA VM 
We do that very often, as per many many customers and users all around the world. If you are using XO from the sources, I would suggest to try instead with XOA (even Free version is enough)
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RE: Best Way to Live Migrate XO VM
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RE: Xcp-ng 8.2 no more recognized with Cloudstack since last update
Indeed, and also you need to ask CloudStack people, because that's very likely related to CS and not XCP-ng
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RE: Best Way to Live Migrate XO VM
As for many (all?) virtualization platform, you need to get the tools installed on your VMs to get an optimal usage of it.
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RE: Best Way to Live Migrate XO VM
Hi,
If the migration doesn't work, it means there's something wrong happening in your VM (it doesn't cooperate). Check your memory settings to be sure dynamic min = dynamic max = static max.
Then, check from the OS perspective if there's enough free RAM and if the OS isn't frozen or something that could cause the migration to fail.
Live migration should work at 100% of the time when the guest cooperate, so there's clearly a problem.
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RE: warm migration vs broken backup link
Question for XO PO, it's already too much details/knowledge for me
Ping @lsouai-vates
