I have just upgraded my Internet link to 1Gbit and realized that my unRAID box doesn't seem to cope with the increased resource need to keep up with the available bandwidth.

I was doing some tests with Deluge/ Transmission dockers and the max speed I can get is somewhat 35MB/sec in case of Deluge, while only about 20MB/sec with Transmission (which would be my preference anyway).

 

I am running that box on an old C2D CPU (Intel E8200) - is this surely the bottleneck and simply too weak to allow saturating the available net/disk throughput? 

 

To clarify: I am able to get around 100MB/s from my notebook on the same Internet link, same torrent, so the link is as advertised. Also I am able to copy to unRAID cache drive on the LAN beyond 100MB/s, so we can take unRAID connection to LAN out of the picture too.

 

So this is either a docker performance issue with the mention CPU or can this be a configuration issue somewhere?

Have you tried some download tests rather than torrents to access your speeds?  I wouldn't base my potential speeds on torrents

Thanks for the attention, but I know what I am doing on that side.

I have torrents where I am 100% confident to test speed with and on the contrary I don't have any remote host from where I can download with certain gigabit speed. 

 

Simply put the question is: is the E8200 powerful enough to run dockers at this speed level or I have to upgrade the whole rig?

How is your docker network configured. Bridge or Host?

 

I tried both and no difference in the speed rates.

I installed iperf in one of my dockers (Tonido) and tested against another server in my network.

 

Both transmit and receive I can get 1 Gbps wirespeed. I don't think there is any speed penalty when using Docker. Perhaps the simple conclusion is your hardware not powerful enough.