Proxmox: Very slow cloning VM (50 minutes for 32 Go)

[cdarsac]

Hi,

I have created an Ubuntu VM 32 Go with Proxmox.

The duration of cloning is about 50mn in my file-system (RAID0 with 7 disk SAS 2,5'' 10k rpm)
https://forum.proxmox.com/attachments/1 ... png.26930/


The transfert rapidely goes to 100% during the first minute, then nothing seems to happend until the cloning end.
https://forum.proxmox.com/attachments/1 ... png.26931/


During cloning, the graphs stop displaying the curves, although the digital counters (CPU Usage, Load average, IO Delay, RAM...) continue to be updated
https://forum.proxmox.com/attachments/1 ... png.26932/



If I clone the same VM from a HDD-Usb disk to the file-system (not same location) , the duration is the same (about 48 mn).

But if I reversely clone from the file-system to the HDD-Usb disk, the duration is only 43 seconds !!!


Then I tested transfert speed with hdd command ( (dd if=/dev/zero of=/tmp/test.data bs=10M count=1024 conv=fdatasync):
to FS: 338 Mo/s​
to HDD-USB: 36 Mo/s​

So the file-system seems to work properly...


Specifications:
- RAID0 with 7 disques SAS 2.5'' 10krpm, 660 Go (NETAPP X422A-R5)
- controleur RAID: P420i, with no "RAM module"
- Server HP Proliant DL360P G8 ( https://www.serveur-occasion.com/fr...- ... ck-1u.html )
CPU(s): 32 x Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz (2 Sockets)
Kernel Version: Linux 5.4.106-1-pve #1 SMP PVE 5.4.106-1 (Fri, 19 Mar 2021 11:08:47 +0100)
PVE Manager Version: pve-manager/6.4-4/337d6701


Do you know where the very slow cloning problem may comme from ?

Best regards,
Christophe.

[arochester]

You mean Proxmox which is derived from Debian? Not actual Debian then.

Proxmox Forum = https://forum.proxmox.com/

[cdarsac]

Yes, that is it!