ZFS and VM bandwidth limitation

[TechSupG16]

I'm making a home server with proxmox 4.2 (kernel 4.4.15-1-pve), a ZFS raidz1 with 4x3TB 7.2kRPM, a SSD for cache and log. The host is an HP ProLiant MicroServer Gen8 with a Intel Celeron G1610T and 10GB of ram.
If i copy a file host(a)-proxmox(in zfs) ( a big ISO, 5GB) with scp my speed is about 106MB/s more or less, if i copy the same file host(a)-VM(nas4free) my speed is only 40/45 MB/s.
Where is the problem?

VM conf:

bootdisk: virtio0
cores: 2
ide2: local:iso/NAS4Free-x64-LiveCD-10.3.0.3.2898.iso,media=cdrom
memory: 2048
name: nas4free
net0: e1000=1E:F8:1F:07:35:04,bridge=vmbr0
numa: 0
ostype: other
smbios1: uuid=f9cfaa41-cdb2-46b7-83f3-7fdd36ceeebf
sockets: 1
virtio0: MachinesDisks:vm-100-disk-1,cache=none,size=32G

pveperf:

Spoiler

pveperf:
CPU BOGOMIPS: 9179.06
REGEX/SECOND: 1133845
HD SIZE: 11.93 GB (/dev/dm-0)
BUFFERED READS: 241.59 MB/sec
AVERAGE SEEK TIME: 0.18 ms
FSYNCS/SECOND: 3620.09
DNS EXT: 56.76 ms
DNS INT: 45.48 ms (example.local)

pveperf zfs:
CPU BOGOMIPS: 9179.06
REGEX/SECOND: 1113403
HD SIZE: 7838.16 GB (HP-MS-Gen8)
FSYNCS/SECOND: 5443.64
DNS EXT: 59.66 ms
DNS INT: 42.09 ms (example.local)"]

 

[dcsapak]

how do you copy it to your vm ? also with scp?
what filesystem do you have inside your vm?
does it help when you change the network adapter from e1000 to virtio?

caution: since nas4free is freebsd, you maybe have to configure the vm when you choose virtio for your network adapter

 

[TechSupG16]

Yes, also i try to copy also with netcat, and i have the same result.
Inside my vm i've a secondary virtio disk formatted in ufs (a data disk, i would put all my files into it).
I just try to change the network card from e1000 to virtio (paravirtualized) but seem nothing change....
any other ideas?