Clonezilla VM io-error

[Walery]

Hello. I am trying to migrate a physical server (linux) to a virtual machine created on PVE 8.4.9 using Clonezilla over the network
VM 16 cpu/32Gb ram/ hdd 1.2 Tb

I launched Clonezilla on the physical server and specified it as a source, then launched Clonezilla in the VM and specified it as a destination. The migration procedure began (1 Tb needs to be migrated). The VM starts to consume all available memory very quickly and at about 6 percent of the completed task, the VM memory is occupied by 99.6 percent. And I get the error io-error yellow Triangle.

How can I migrate a physical server to a VM?

 

[JensF]

Sounds like you overcommitted your RAM and OOM killed your VM. But without any information about your PVE it's hard to know.
I would start Clonezilla with 4 vCores and 8GB of RAM. Should be enough for cloning.

 

[Walery]

Sounds like you overcommitted your RAM and OOM killed your VM. But without any information about your PVE it's hard to know.
I would start Clonezilla with 4 vCores and 8GB of RAM. Should be enough for cloning.

PVE 8.4.9
CPU(s) 24 x Intel(R) Xeon(R) CPU E5-2430 0 @ 2.20GHz (2 Sockets)
Kernel Version Linux 6.8.12-13-pve
RAM 48 Gb

 

[JensF]

Okay, so 12 "real" cores. I would suggest to assign max these 12 cores to a VM and let PVE some hyper threads to work with.
48GB of RAM should be fine for a 32GB VM, but only if you're not using ZFS or other VMs.

 

[Walery]

Okay, so 12 "real" cores. I would suggest to assign max these 12 cores to a VM and let PVE some hyper threads to work with.
48GB of RAM should be fine for a 32GB VM, but only if you're not using ZFS or other VMs.

Xeon(R) CPU E5-2430 CPU Specifications​

Total Cores
6
Total Threads
12
(2 Sockets)
In VM settings select Sockets 2 Cores 6 ? or Sockets 1 Cores 12 ?

 

[leesteken]

Same number of sockets and enable NUMA: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_numa

 

[JensF]

I tried both, even with NUMA enabled. It doesn't make any difference performance-wise. At least with PVE 8.x
Edit: But I never assigned all my cores to one VM only. So just test it.