antiserious
The Future ain't what it used to be
Premium
join:2001-12-12
Scranton, PA
| [BT] Torrent speed/load question
I use Deluge (in Linux) for torrents, and right now I'm downloading two torrents and seeding one. I've noticed that if I max out my upload speed it affects my download speed - I guess you can't max out both up and down simultaneously, which makes sense. But if I adjust my upload speed for a specific torrent it seems to have an effect on the download speed of that torrent. Is that normal? It's not a big deal, but it made me curious. I'm not a heavy torrent user and there's not often more than two running, usually one, so I've never noticed this behavior before and thought I'd ask. Thanks in advance.
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"My goal in life is to become the kind of problem that people throw money at".
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dvd536
as Mr. Pink as they come
Premium
join:2001-04-27
Phoenix, AZ
| said by antiserious  :I use Deluge (in Linux) for torrents, and right now I'm downloading two torrents and seeding one. I've noticed that if I max out my upload speed it affects my download speed - I guess you can't max out both up and down simultaneously, which makes sense. But if I adjust my upload speed for a specific torrent it seems to have an effect on the download speed of that torrent. Is that normal? It's not a big deal, but it made me curious. I'm not a heavy torrent user and there's not often more than two running, usually one, so I've never noticed this behavior before and thought I'd ask. Thanks in advance. Peers give preference to those that upload to them, dropping upload rate is going to make a certain peer prefer another and they'll either drop the rate they send to you at or simply disconnect from you altogether.
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You can never be too rich, too thin or have too much Bandwidth |
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antiserious
The Future ain't what it used to be
Premium
join:2001-12-12
Scranton, PA
| reply to antiserious
I see. As it turned out, changing the upload setting back to unlimited didn't seem to have any effect in this case, but that's good to know.
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"My goal in life is to become the kind of problem that people throw money at".
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Dogg
Premium
join:2003-06-11
Belleville, IL
 ·Charter Pipeline
1 edit | reply to antiserious
It's also common for your download to suffer when the upload is at max. A simple test would be to try surfing the web. A little trial and error will find you the "magic number" where upload starts affecting download.
It's also covered in the FAQ.
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Google is your Friend |
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jap
Premium
join:2003-08-10
038xx
·RoadRunner Cable
1 edit | reply to antiserious
said by antiserious :I see. As it turned out, changing the upload setting back to unlimited didn't seem to have any effect in this case, but that's good to know. BT protocol rewards generosity: all peers compete for best traders so the generous get generous peers, stingy get stingy peers.
But you do need to hold your upload just shy of capacity so as not to interfere with replies from peers. It's an extremely chatty protocol and, in addition to simple bottlenecking your downstream, the timeouts other peers see make them look elsewhere.
Cable is more forgiving than DSL. Things vary alot depending on tuning, line quality, your ISP's deployed tech, yaddayadda. Rule of thumb is perform a dozen or so upstream tests at various time of day, average them, and limit your client 10-15% below your capacity for DSL, 5% for cable. Tuning TCP helps too. Use the BBR tweak guides & tools if you want to play around with it.
G'luck!  |
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