Transmission killing network

Ask for help and report issues with the Mac OS X version of Transmission
winstano
Posts: 2
Joined: Sat Mar 26, 2011 10:50 pm

Transmission killing network

Postby winstano » Sat Mar 26, 2011 11:00 pm

Hi all,

Random one here. I've set up my girlfriend's iMac (core duo 1.83GHz, running 10.6.6) with Transmission running. The problem comes when she starts to download a file.

Any files start to download perfectly fine, but after a while they just completely kill the network. Other computers are unable to access anything at all, until the downloads are paused. (I've tried limiting the speed, but that's no help at all, same thing happens.

Bizarrely, it doesn't happen when *I* run Transmission on my MacBook Pro, nor any other torrent client on her machine. It appears to only be Transmission, and only on her iMac. The second you pause downloads (even ones that are running at 80kbps), you can access stuff again.

I've opened up the log, and there's nothing majorly out of the ordinary in there. The only thing that I could see that looked possibly related was "DHT announce done".

I'm not massively clued up on Transmission/BT tech in general, but will be able to provide any more info if needed.

Any ideas? I had thought it could be traffic shaping from her ISP, but I'm on the same network, using the same program, and the same ports, with no problems at all.

x190
Posts: 4924
Joined: Sun Nov 30, 2008 4:59 am

Re: Transmission killing network

Postby x190 » Sat Mar 26, 2011 11:47 pm

Open a different port for the gf.

viewtopic.php?f=2&t=11184#p52020
viewtopic.php?f=4&t=11256&p=53014&hilit=mini#p52340

Alternately try a nightly. µTP is available and should be made to order for your situation.

http://transmission.xpjets.com/
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winstano
Posts: 2
Joined: Sat Mar 26, 2011 10:50 pm

Re: Transmission killing network

Postby winstano » Sun Mar 27, 2011 8:18 am

Cheers, will try and give that a shot today.

I've tried plenty of different ports, and placed her iMac in the DMZ for the router so it's outside the firewall but still having the same issue. I'll try a nightly later on and see how I get on

mikeflynn
Posts: 3
Joined: Sun Mar 27, 2011 7:09 pm

Re: Transmission killing network

Postby mikeflynn » Sun Mar 27, 2011 7:13 pm

I was having the same issue, anytime I had Transmission open the network would go down within 3 minutes. In most cases my seeded torrents didn't even have any activity at the time. I tried limiting global connection and all that but it didn't help. I went back to version 2.12 and it works perfectly again...so it has something to do with the newest version.

Ecologisto
Posts: 1
Joined: Tue Mar 29, 2011 7:06 am

Re: Transmission killing network

Postby Ecologisto » Tue Mar 29, 2011 7:09 am

Dear all,

Just to mention that I have the same problem on my computer. With former versions of Transmission (don't know which one) everything was fine. Now, when I download stuff, even at low rates, the network is stuck. My gf that uses the same router sees it as well. It makes browsing the web almost impossible.
However, I have the feeling it is a bit random, some times, rarely, it doesn't happen.

Cheers,
Barth

beerski
Posts: 8
Joined: Sun Mar 09, 2008 8:19 pm

Re: Transmission killing network

Postby beerski » Thu Apr 14, 2011 1:12 am

I had this problem a while ago and tried limiting bandwidth, peers, etc. but nothing worked. Found a thread where someone suggested disabling peer exchange (PEX), and my Transmission has worked flawlessly since.

It used to grind the whole network to a halt but now we can stream Netflix, load web pages and download without any speedlimit set. Something weird going on with PEX.

x190
Posts: 4924
Joined: Sun Nov 30, 2008 4:59 am

Re: Transmission killing network

Postby x190 » Thu Apr 14, 2011 3:14 am

No PEX->Fewer Peers->Lower Connection Numbers->Lower Bandwidth Usage.
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mikeflynn
Posts: 3
Joined: Sun Mar 27, 2011 7:09 pm

Re: Transmission killing network

Postby mikeflynn » Wed May 18, 2011 4:51 pm

Updated to 2.31, still having this issue. PEX disabled. Shame, I really want to use the call-script function, but Transmission just kills my network after being open about 10 minutes.

x190
Posts: 4924
Joined: Sun Nov 30, 2008 4:59 am

Re: Transmission killing network

Postby x190 » Wed May 18, 2011 6:30 pm

Important points:

• Limit global connections to 100 or less.
• Limit active torrents to 10.
• Stay within global limits if using any per-torrent settings.
• Test your available bandwidth and set limits to 60% of tested. Be careful with unit conversion.
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Jordan
Transmission Developer
Posts: 2311
Joined: Sat May 26, 2007 3:39 pm
Location: Titania's Room

Re: Transmission killing network

Postby Jordan » Thu May 19, 2011 4:10 pm

Everything x190 says in the previous post is correct, but I would also add that you should first try these steps: [ disable DHT -> exit T -> reboot your router -> restart T ] ... some routers have a difficult time keeping up with DHT.

mikeflynn
Posts: 3
Joined: Sun Mar 27, 2011 7:09 pm

Re: Transmission killing network

Postby mikeflynn » Thu May 19, 2011 11:21 pm

Thanks for the suggestions, I will try them when I get home. I know I have DHT off, and my global connections is set at 50 so I will check my settings for active torrents and available bandwidth.

ooze
Posts: 9
Joined: Tue Feb 08, 2011 4:17 pm

Re: Transmission killing network

Postby ooze » Fri May 20, 2011 7:36 am

I have the same issue with all versions above 2.13. I tried disabling PEX and DHT and limit my connections to 100. Downloads and uploads are slower and sometimes the network goes more or less completely down (very very slow websurfing). With 2.13 have set the connection limit to 200 and PEX+DHT enabled and everything works fine. I guess I'll have to downgrade again.

x190
Posts: 4924
Joined: Sun Nov 30, 2008 4:59 am

Re: Transmission killing network

Postby x190 » Fri May 20, 2011 8:54 am

ooze wrote:I have the same issue with all versions above 2.13. I tried disabling PEX and DHT and limit my connections to 100. Downloads and uploads are slower and sometimes the network goes more or less completely down (very very slow websurfing). With 2.13 have set the connection limit to 200 and PEX+DHT enabled and everything works fine. I guess I'll have to downgrade again.


Whatever works for you. 8-) Back in the day, 1.34 was hard to beat IMO and no doubt still gets the job done.
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Sodomy
Posts: 12
Joined: Sun Feb 21, 2010 12:09 am

Re: Transmission killing network

Postby Sodomy » Tue Aug 09, 2011 12:26 am

ooze wrote:I have the same issue with all versions above 2.13. I tried disabling PEX and DHT and limit my connections to 100. Downloads and uploads are slower and sometimes the network goes more or less completely down (very very slow websurfing). With 2.13 have set the connection limit to 200 and PEX+DHT enabled and everything works fine. I guess I'll have to downgrade again.


I have the exact same problem (just made a thread about it without seeing this one). Transmission handled the IP connections fine on 2.13, but once I upgraded to 2.33 it's overload city. I have it set to 50 connections globally and 10 connections per torrent, and it's still maxing out my IP connections on the router (4096). I would love to downgrade to 2.13, except it has a horrible bug on Lion where if I click the triangle to open up a directory inside a multi-directory torrent in the torrent inspector, the app freezes up completely. This is beyond miserable. Can some kind person please somehow fix the bug in 2.13 but keep everything else as is? I might have to go back on 2.13 and just never inspect a multi level directory.

Edited to add: Problem possibly solved!

After a suggestion in #transmission on freenode by the helpful John_, I went under Preferences -> Network, and disabled Micro Transport Protocol (µTP). That cleared things right up. And now my connections have dropped to a manageable 80% level.

ozwalkerz
Posts: 1
Joined: Sun Aug 14, 2011 7:26 am

Re: Transmission killing network

Postby ozwalkerz » Sun Aug 14, 2011 7:31 am

Interestingly I seem to be getting the same issue with Transmission (7.22) running on FreeNAS 0.7.2 Sabanda (revision 6694)

I will find a more appropriate place to post of my woes, but I tought it interesting that people on other O/S's seem to be suffering the same problem!

Cheers,

STu


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