borrow one from someone :)

I've tired downloading with a static port mapping instead of UPnP and got exactly the same issue. As I've expected. 

I'm sure it has something to do with BigPipe network. 

spoonboy:

 

I've tired downloading with a static port mapping instead of UPnP and got exactly the same issue. As I've expected. 

 

I'm sure it has something to do with BigPipe network. 

 

have you ruled out everything in your network?

Ok, I've got some progress with investigating the issue that I would like to share.
In short, my conclusion is that Bigpipe has slow external Internet channel. Slower than Spark, at least. This is causing the issue.

Now, how did I find this. There is a parameter in uTorrent that specifies a max number of connected peers. It was set to 100 in my client. With Spark is was enough to get a full download speed on most of the popular torrents. But with BigPipe it never reached 10MB/s. After increasing the parameter to 300, I managed to finally get download speed of 10MB/s. With the few notices: 1) it take longer time before the full download speed is reached and 2) it's still less stable, i.e. it's fluctuating around 10 while with Spark it was pretty stable.

So, why increasing the number of peers improved the download? I think, because a speed of each individual peer is slower in Bigpipe. So, having just 100 sources was not enough to fully load the 100Mbps channel.

Is the issue solved now? Unfortunately, no. Increasing the peers number only helps when the torrent is really popular and you have hundreds of seeders. On a less popular torrent or with p2p tv, where you have to deal with a couple of dozens peers, the download speed is still significantly lower than with Spark. That's whey the P2P tv is freezing.

Since BP is moving to our core soon, this may be just something to work with for a little while.

If you have multiple files downloading do you still hit your "artificial limit"?

https://torrents.linuxmint.com/

try downloading one of those 18.3 iso's with your connections set to 100. those are very well seeded legal torrents im maxing out my VDSL connection.

if you download a file from here:
http://ucmirror.canterbury.ac.nz/linux/ubuntu/18.04/
how fast does it download?

I hate to sound enigmatic .... but ... 

There is nothing particularly wrong with the Bigpipe network.  There is just some things that the Spark network does better.  It has better secret sauce.

Not to worry, Bigpipe will soon get some of that sauce as it moves to the Spark core.

cbrpilot:

 

I hate to sound enigmatic .... but ... 

 

There is nothing particularly wrong with the Bigpipe network.  There is just some things that the Spark network does better.  It has better secret sauce.

 

Not to worry, Bigpipe will soon get some of that sauce as it moves to the Spark core.

 

Nom Nom Nom.. Secret Sauce! Delicious stuff! :-)

Cheers - N

Talkiet:

 

cbrpilot:

 

I hate to sound enigmatic .... but ... 

 

There is nothing particularly wrong with the Bigpipe network.  There is just some things that the Spark network does better.  It has better secret sauce.

 

Not to worry, Bigpipe will soon get some of that sauce as it moves to the Spark core.

 

 

Nom Nom Nom.. Secret Sauce! Delicious stuff! :-)

 

 

 

Cheers - N

 

 

 

now i begin to wonder what you two get up to down there... 

Might be consuming too much secret sauce ;-)

Jase2985:

 

If you have multiple files downloading do you still hit your "artificial limit"?

 

https://torrents.linuxmint.com/

 

try downloading one of those 18.3 iso's with your connections set to 100. those are very well seeded legal torrents im maxing out my VDSL connection.

 

if you download a file from here:
http://ucmirror.canterbury.ac.nz/linux/ubuntu/18.04/
how fast does it download?

 

Tested with  3 Ubuntu images download in parallel and got the same picture. 

Settings: max number connections per torrent - 100. Global max number - 300. 

When downloading an individual torrent the speed is about 7 MB/s.

Submitting all the three downloads simultaneously gives a total download speed of 9.8-10 MB/s

So, the issue is with the BigPipe Internet channel. 

It would be interesting to compare speedtest results on some overseas hosts in BigPipe and Spark. 

Hmmm. Ok, I don't think anyone looked at the OP - @coil is right - 10MB/s = 80Mbps.

Time for @spoonboy and others to check this again.

freitasm:

 

Hmmm. Ok, I don't think anyone looked at the OP - @coil is right - 10MB/s = 80Mbps.

 

Time for @spoonboy and others to check this again.

 

No I completely understand his issue.  As Yitz said he has detected that he needs far more TCP peers with Bigpipe than Spark to get from 80Mbit to 100Mbit.

His options are to wait a few weeks until we migrate Bigpipe to the Spark network, or move back to Spark.  

Another option would be to look at other RSPs, but that could be a bit hit and miss as I suspect some of them have a setup very similar to Bigpipe.