mcmanuf
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Torrent download box- RPi2 not quite powerfull enough :(

Fri Oct 02, 2015 8:21 am

Hi.

I have multiple RPi (1 + 2) and have had alot of good use in them, and still do.
However unfortunately they are not quite powerfull enough for usage as a bittorrent download client, only basic use.

I have a 50Mb/10Mb connection, and the download is very unstable (throttling between 1-5 MB/s), due to the shared network/usb chip on the PI I imagine. The same torrent files on PC is 6,2 MB/s stable.

I hope it is okay that I ask in here, if there are any good linux mini-pc alternatives, with very low power consumption (<3-4 watt), that can max out my ethernet connection (> 6 MB/s stable), when connected to external USB HDD (ext4 format).

Thank you

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RaTTuS
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Re: Torrent download box- RPi2 not quite powerfull enough :(

Fri Oct 02, 2015 9:13 am

50 mbps is approx 6.25MB/s
so you PC is doing it fine

what format is the drive you are using on the RPi?
ext2/3/4 or NTFS
you should be able to max out the RPi at 12 MB/s [approx]
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mcmanuf
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Re: Torrent download box- RPi2 not quite powerfull enough :(

Fri Oct 02, 2015 9:54 am

Thank you for the answer.

I am using ext4 on the HDD. (I know NTFS for example can give a lot of problems)

Yes theoretically is one thing, but it is more or less impossible to reach any steady/stable speed on the pi.
The CPU is not the culprit, but I think the design of the PI is the main culprit here, with the shared usb/ethernet bus.

So even though the PI can reach maximum speed, it is like it has to flush some bufferes or something like it, as the speed varies like crazy. So the final speed becomes something like 2,3 MB/s over the whole torrent.

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RaTTuS
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Re: Torrent download box- RPi2 not quite powerfull enough :(

Fri Oct 02, 2015 10:02 am

well it may be another issue as I get good rates though my setup 11-12MB/s typically[though I'm not using torrents]

the shared usb / ethernet is what we have to live with as that is how this SOC is made

is it a real HD and not flash ?

what is top saying
what other things are running

how much memory have you got assigned to the GPU
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mcmanuf
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Re: Torrent download box- RPi2 not quite powerfull enough :(

Sat Oct 03, 2015 6:37 am

Can you really get 11-12MB/s on the pi? Stable?

What is the source/destination?

It is an external HD. I have tried with flash as well with no luck.

Right now i'm not capable to test these issues, but I know, that the CPU is not maxed out.

I have tried configuring the systctl file, i have tried different buffer sizes for transmission daemon, and I have tried the smallest distro available. All with no luck.

i think that the conclusion that the PI is not capable is unfortunately the case, unless someone can show a working setup with high stable torrent speeds.

fruitoftheloom
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Re: Torrent download box- RPi2 not quite powerfull enough :(

Sat Oct 03, 2015 7:34 am

mcmanuf wrote:Can you really get 11-12MB/s on the pi? Stable?

What is the source/destination?

It is an external HD. I have tried with flash as well with no luck.

Right now i'm not capable to test these issues, but I know, that the CPU is not maxed out.

I have tried configuring the systctl file, i have tried different buffer sizes for transmission daemon, and I have tried the smallest distro available. All with no luck.

i think that the conclusion that the PI is not capable is unfortunately the case, unless someone can show a working setup with high stable torrent speeds.
http://www.mikronauts.com/raspberry-pi/ ... pter-tests
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mcmanuf
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Re: Torrent download box- RPi2 not quite powerfull enough :(

Sat Oct 03, 2015 11:43 am

That link doesn't really show bittorrent performance whatsoever.
Yes it shows the Pi is very capable when reading and writing data sequentially, and can easily max out the 100mbit.
But thats not how torrents work?
I am talking about real life performance, including non sequential writing, multiple tcp connections, etc etc,.
I have limited the number of concurrent connections to as low as 5 connections, to not but alot of strain on the ethernet chip.

I dont really know anymore how to troubleshoot this issue.

I have however just found this thread,
viewtopic.php?f=36&t=108684
And I have exactly the same problem with the speed trhottling.
I can see this person has managed to get 9MB/s in torrent performance from deluge.
So maybe there is no need to look for alternatives right now(banana pi, cubox, etc etc.), I maybe just need to switch from transmission to deluge?

fruitoftheloom
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Re: Torrent download box- RPi2 not quite powerfull enough :(

Sat Oct 03, 2015 1:15 pm

mcmanuf wrote:That link doesn't really show bittorrent performance whatsoever.
Yes it shows the Pi is very capable when reading and writing data sequentially, and can easily max out the 100mbit.
But thats not how torrents work?
I am talking about real life performance, including non sequential writing, multiple tcp connections, etc etc,.
I have limited the number of concurrent connections to as low as 5 connections, to not but alot of strain on the ethernet chip.

I dont really know anymore how to troubleshoot this issue.

I have however just found this thread,
viewtopic.php?f=36&t=108684
And I have exactly the same problem with the speed trhottling.
I can see this person has managed to get 9MB/s in torrent performance from deluge.
So maybe there is no need to look for alternatives right now(banana pi, cubox, etc etc.), I maybe just need to switch from transmission to deluge?
rtorrent which is CLi only is in the repository ;)

http://linux.die.net/man/1/rtorrent
Rather than negativity think outside the box !
RPi 4B 4GB (SSD Boot)..
Asus ChromeBox 3 Celeron is my other computer...

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