Smb slow backup with some machines

[abranca]

hi guys,
I have a problem with running some backups.
On my proxmox machine I have 3 vm and I exce snapshot lzo on a nas mounted by smb.
On the first two machines, the backup remains locked at 8%, while the third one runs smoothly and quickly.

pveversion

root@mymachine:~# pveversion -v
proxmox-ve: 4.4-76 (running kernel: 4.4.35-1-pve)
pve-manager: 4.4-1 (running version: 4.4-1/eb2d6f1e)
pve-kernel-4.4.35-1-pve: 4.4.35-76
lvm2: 2.02.116-pve3
corosync-pve: 2.4.0-1
libqb0: 1.0-1
pve-cluster: 4.0-48
qemu-server: 4.0-101
pve-firmware: 1.1-10
libpve-common-perl: 4.0-83
libpve-access-control: 4.0-19
libpve-storage-perl: 4.0-70
pve-libspice-server1: 0.12.8-1
vncterm: 1.2-1
pve-docs: 4.4-1
pve-qemu-kvm: 2.7.0-9
pve-container: 1.0-88
pve-firewall: 2.0-33
pve-ha-manager: 1.0-38
ksm-control-daemon: 1.2-1
glusterfs-client: 3.5.2-2+deb8u3
lxc-pve: 2.0.6-2
lxcfs: 2.0.5-pve1
criu: 1.6.0-1
novnc-pve: 0.5-8
smartmontools: 6.5+svn4324-1~pve80
zfsutils: 0.6.5.8-pve13~bpo80

for the machine config i attach screen file.
i have this problem with machine id 100 and 101. with 102 i don't have this problem.
VM ID 100


VM ID 101


VM ID 102

 

[abranca]

If I can add, attach two screenshots of vm 101 backup launched this morning and blocked them at 7%. This only happens with vm 100 and 101, with 102 it's all right. I do not understand if it is a machine configuration problem or something else.

 

[abranca]

any idea?

 

[dcsapak]

what is your target storage ?

 

[abranca]

what is your target storage ?

thank you for your reply.
it's a nas mounted via smb protocol