I've started using an MXQ-4K box as a file server, but writing files over the network is slow, with speeds in the 3-5 MB/s range. Reads cap out at the fast ethernet link speed (~11 MB/s). I don't believe there's a CPU, disc, or RAM bottleneck as the speeds are the same regardless of file size or transfer protocol as SMB, FTP, and WebDAV all give me the same speeds, and checking in htop, they are never at 100%. These speeds are also observed when downloading a file from another device on the local network using wget or aria2 while sshed into it, with faster speeds on other devices. As far as I can tell, iostat doesn't suggest high io wait times are the culprit. If it matters, I'm writing to an external USB HDD, but the write speeds are the same when writing to the SD card through the network, which makes me believe this is not an issue. If I write a ~1.0GB file using dd to the HDD while sshed into it with `dd if=/dev/random of=/mnt/disk/tmp.bin bs=64k count=16500 conv=fdatasync`, it gives a local disk speed of ~20 MB/s, which is more than enough to saturate the 100 mbps link. Has anyone else experienced similar results? Are the slow network speeds just a limitation of the onboard nic/hardware? I'm open to suggestions.
