Noticed slow transfer speeds of ~35 MB/s when sending a single 5 GB file from my Macbook Pro to my NAS running on Xpenology/Synology in a Proxmox VM.
The NAS is first mounted onto the Macbook Pro using AFP over TCP , then the file is dragged and dropped into the mounted drive.
The Proxmox server is connected to a 1G network switch port, and the Macbook Pro is tested over both Wifi 802.11ac and a wired ethernet connection connected to the same network switch. The Xpenology VM uses a RAID-0 ZFS array as its storage which is made up of four 16 TB 5400 rpm HDD.
Do you expected the transfer speeds to be closer to the read speeds of a 5400 rpm drive? I believe this value is around 70-80 MB/s. Furthermore, RAID-0 should make this above 100 MB/s.
Otherwise, how do we troubleshoot the slow transfer speed?
iperf3 Tests
Results with Proxmox as iperf server, Macbook (wifi) as client:
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.1.138, port 57104
[ 5] local 192.168.1.2 port 5201 connected to 192.168.1.138 port 57105
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 36.6 MBytes 307 Mbits/sec
[ 5] 1.00-2.00 sec 37.7 MBytes 316 Mbits/sec
[ 5] 2.00-3.00 sec 36.4 MBytes 305 Mbits/sec
[ 5] 3.00-4.00 sec 36.0 MBytes 302 Mbits/sec
[ 5] 4.00-5.00 sec 36.6 MBytes 307 Mbits/sec
[ 5] 5.00-6.00 sec 36.8 MBytes 309 Mbits/sec
[ 5] 6.00-7.00 sec 36.1 MBytes 303 Mbits/sec
[ 5] 7.00-8.00 sec 34.7 MBytes 291 Mbits/sec
[ 5] 8.00-9.00 sec 34.1 MBytes 286 Mbits/sec
[ 5] 9.00-10.00 sec 30.0 MBytes 252 Mbits/sec
[ 5] 10.00-10.03 sec 578 KBytes 177 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.03 sec 356 MBytes 298 Mbits/sec receiver
Results with Proxmox as the iperf client, Macbook (wifi) as server:
Connecting to host 192.168.1.138, port 5201
[ 5] local 192.168.1.2 port 53068 connected to 192.168.1.138 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 12.3 MBytes 103 Mbits/sec 13 50.9 KBytes
[ 5] 1.00-2.00 sec 13.0 MBytes 109 Mbits/sec 11 35.4 KBytes
[ 5] 2.00-3.00 sec 10.6 MBytes 89.2 Mbits/sec 13 48.1 KBytes
[ 5] 3.00-4.00 sec 12.5 MBytes 105 Mbits/sec 10 62.2 KBytes
[ 5] 4.00-5.00 sec 11.8 MBytes 98.6 Mbits/sec 15 69.3 KBytes
[ 5] 5.00-6.00 sec 11.1 MBytes 93.1 Mbits/sec 16 63.6 KBytes
[ 5] 6.00-7.00 sec 12.2 MBytes 102 Mbits/sec 15 17.0 KBytes
[ 5] 7.00-8.00 sec 10.3 MBytes 86.7 Mbits/sec 18 49.5 KBytes
[ 5] 8.00-9.00 sec 11.2 MBytes 93.6 Mbits/sec 13 45.2 KBytes
[ 5] 9.00-10.00 sec 10.9 MBytes 91.7 Mbits/sec 19 26.9 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 116 MBytes 97.2 Mbits/sec 143 sender
[ 5] 0.00-10.00 sec 115 MBytes 96.8 Mbits/sec receiver
Results with Proxmox as iperf server, Macbook (ethernet) as client:
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.1.99, port 57137
[ 5] local 192.168.1.2 port 5201 connected to 192.168.1.99 port 57138
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 81.7 MBytes 685 Mbits/sec
[ 5] 1.00-2.00 sec 87.8 MBytes 737 Mbits/sec
[ 5] 2.00-3.00 sec 87.5 MBytes 734 Mbits/sec
[ 5] 3.00-4.00 sec 87.1 MBytes 731 Mbits/sec
[ 5] 4.00-5.00 sec 88.4 MBytes 742 Mbits/sec
[ 5] 5.00-6.00 sec 86.4 MBytes 725 Mbits/sec
[ 5] 6.00-7.00 sec 88.2 MBytes 740 Mbits/sec
[ 5] 7.00-8.00 sec 87.1 MBytes 730 Mbits/sec
[ 5] 8.00-9.00 sec 86.3 MBytes 724 Mbits/sec
[ 5] 9.00-10.00 sec 85.5 MBytes 717 Mbits/sec
[ 5] 10.00-10.01 sec 423 KBytes 653 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.01 sec 866 MBytes 726 Mbits/sec receiver
Results with Proxmox as the iperf client, Macbook (ethernet) as server:
Connecting to host 192.168.1.99, port 5201
[ 5] local 192.168.1.2 port 50916 connected to 192.168.1.99 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 77.8 MBytes 653 Mbits/sec 92 28.3 KBytes
[ 5] 1.00-2.00 sec 87.2 MBytes 732 Mbits/sec 87 29.7 KBytes
[ 5] 2.00-3.00 sec 87.0 MBytes 730 Mbits/sec 91 26.9 KBytes
[ 5] 3.00-4.00 sec 76.1 MBytes 638 Mbits/sec 106 126 KBytes
[ 5] 4.00-5.00 sec 81.2 MBytes 681 Mbits/sec 103 41.0 KBytes
[ 5] 5.00-6.00 sec 90.4 MBytes 759 Mbits/sec 93 65.0 KBytes
[ 5] 6.00-7.00 sec 88.5 MBytes 742 Mbits/sec 83 35.4 KBytes
[ 5] 7.00-8.00 sec 79.8 MBytes 669 Mbits/sec 108 32.5 KBytes
[ 5] 8.00-9.00 sec 90.4 MBytes 759 Mbits/sec 75 39.6 KBytes
[ 5] 9.00-10.00 sec 85.8 MBytes 720 Mbits/sec 78 228 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 844 MBytes 708 Mbits/sec 916 sender
[ 5] 0.00-10.00 sec 843 MBytes 707 Mbits/sec receiver
iperf Done.
Network Diagram
=====: Wired Cat6 connection
-----: Wifi 802.11ac
Proxmox ===== Unifi Switch ===== Unifi Access Point ------- Macbook Pro (wifi)
|
====== Macbook Pro (USB-c ethernet adapter)
Access point is placed on top of the switch, which is very hot. Maybe the access point is overheating, causing the slow speeds?
Update: Changing 5Ghz channel after doing a RF scan and going from 4 to 8 channel widths helped achieve 500 Mbps over wifi
