NethServer Version: 6.9
Module: KVM
I have created a Windows Server VM, but when I transfer file with Filezilla, it starts with a speed of 60MB/s, and after about 30 second it goes at 4MB/s… why?
Thanks.
Federico Ballarini
I have reinstalled all VirtIO drivers and seems it works…
Update: it’s slow after it pass 60% of file…
did you try it with another client, maybe it’s a problem of the FTP server.
Did you make a speedtest (http://beta.speedtest.net/) to check if only ftp is affected?
Filezilla also has a speed limit setting…
Do you have high cpu load when using ftp?
Just some ideas.
I think is a disk problem… but I have already installed virtio drivers and disk is virtio… I have to convert it from qcow2 to raw?
yes, it’s recommended for Windows at Proxmox.
Consider using raw image or partition for a partition, especially with Microsoft SQL database files because qcow2 can be very slow under such type of load.
Source: Performance Tweaks - Proxmox VE
I have to do this also for linux?
No, it’s not explicitly suggested as it is for Windows.
But there are many discussions about that:
https://www.google.at/search?source=hp&q=kvm+raw+vs+qcow2+linux
I have tried on Linux and its works fine… after Windows finish some operation I will do this.
But I have a question… how can I do snapshot of raw disk?
I’m obtaining an error:
unsupported configuration: internal snapshot for disk vda unsupported for storage type raw
Thanks.
Federico Ballarini
Found this:
From the Proxmox Site:
Requirements
In order to use Proxmox VE live snapshots all your virtual machine disk images must be stored as qcow2 image or be in a storage that supports live snapshots and is managed by Proxmox VE.
Source:
https://pve.proxmox.com/wiki/Live_Snapshots
EDIT:
It seems to be not possible: