I’ve checked various sources and forum posts but I can’t figure out why the speed on my LAN Connection is stuck at around 40-50 Mbps when sending data from one of my machines.
I am running Syncthing on TrueNAS Scale and a Windows Machine. Both are connected via a 10Gbps Connection that also delivers such speeds when copying files directly via SMB.
Syncthing on my Windows Machine runs via SyncTrayzor. Syncthing on the NAS runs via the Truecharts Docker Image.
Both installations show the connection Type as TCP LAN.
CPU/RAM/Drive/Network usage is low on both machines. On Windows around 1% CPU, 820 MB RAM (50GB free). On TrueNAS (data via netdata) the container hovers about 10% of it’s allowed CPU Usage and 20% of it’s allowed RAM Usage.
The storage paths in the docker are mounted as Host Paths. CPU Resources as 4000m and RAM as 8Gi.
When I send data from Windows to TrueNAS via Syncthing I get full performance as fast as the LAN network connection allows. When syncing data from TrueNAS to Windows I get abysmal speed. So clearly the Syncthing installation on my NAS is to blame. But why?
I’m out of ideas at this point what to look at next.
What kind of storage is the syncthing database (usually ~/.config/syncthing) located on? Slow storage (read hard disks) can significantly impact the syncing speed. Though for such large files as yours I wouldn’t expect a big impact after initial index exchange - still worth checking.
Since my last post here the behaviour has changed drastically.
I am not sure what exactly caused it because I changed quite a few things around my setup (switched from a SATA to PCIe Card to a SAS Card, introduced a new dataset order with separation between SMB Access and Container Access, put my Docker Container on a seperate User ID and managed the access to the files via NFS ACLs, updated to TrueNAS Scale Bluefin) but I do suspect the recent TrueNAS Scale update as having a part in it.