As the title says, I've been trying to improve my NAS write speeds, using a 2TB nvme pcie4 nvme over a 10Gb network.

That said, I managed to eliminate all intermediary factors from the equation, by connecting directly to NAS from PC, but found the same behavior 1/2; speed writes, w/ full speed(1.1 GB/s), read speeds

In addition to this, I tried;

iperf3 = 9.98Gb/s

File transfer to Promox VM = 9.93Gb/s read/write
File transfer to Ubuntu bare metal server = 9.97Gb/s read/write

Any ideas or suggestions?

PS, did the usual MTU/Large frame, flow control, etc, etc, none appear to make a difference, best I can get is 5.1Gb/s transient, though mostly 5Gb/s on average

PS2. I'm using SPF+ w/fiber optic

Edited May 23, 20242 yr by JohnBee

unraid 10 GB connection is either being limited by the host itself settings for a guaranteed network and you would use the plugin tip and tweaks to edit rx / tx value to edit this

 

The PC? I assume windows... Would also have setting in place to edit similar values. its the portocal and handshake at connection that dictates the speed. Similar to a usb connection to guarantee a read/write the systems will lower to safer known speed to guarantee the connection.

I have only seen ftp use the full bandwidth and transfer at the higher speeds without editing other advance network settings.
MYU/Flow control and jumbo frames are a big one 

in esscens you have an "ad-hoc" network setup. Witch has its own caviet on the connection made.
 In the end when hardware can but done't its due to software limitations.

See linux kernel on tuning a 10GB card:
https://www.kernel.org/doc/ols/2009/ols2009-pages-169-184.pdf

Try using an exclusive share (or disk share).