Minecraft server + torrent downloads = bad

August 11, 2011 at 08:26:27
Specs: Slackware Linux 13.37, Athlon 64 X2 @ 3.0GHz / 2GB
My setup:
Computer 1: everyday stuff and torrent downloads. Connected by cable.
Computer 2: Minecraft server. Connected by cable.
Router: D-Link DIR-601
Internet: 16mbit down and 4mbit up advertised by Comcast; speedtest.net reports up to 30mbit down at times.

Problem: I can't download torrents at more than 2mbits without causing terrible server lag to the people on my Minecraft server.

Things I have tried:
- the router doesn't have configurable QoS so I installed the program NetLimiter on computer 1 to put bandwidth caps on both uTorrent and the computer as a whole. This helps, but it still doesn't solve the problem.
- I limited the number of max connections in uTorrent. This didn't seem to help much.

Minecraft servers need relatively very little download bandwidth; the iftop command in Linux never shows it using more than 100Kbps. So the question is, why can't computer 1 download torrents at, say, 12Mbps without making the server lag when the server only uses less than 100Kbps? Upstream bandwidth is limited to like 5Kbps in computer 1 (mostly for seeding torrents) so computer 2 is still getting virtually all the upload bandwidth.

My primary guess right now is I need to get a better router, but I'm not so sure. I don't know much about routers. What can /g/ tell me?

Stats posted below are the server computer.

(Note: the server runs fine with 12 players connected when torrents are not being downloaded, so it's not a computer issue.)

Thanks in advance!

If I connect my microwave to my PC, will I be able to download food? I posted a question, haha


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#1
August 11, 2011 at 08:28:53
Oh, ignore the "What can /g/ tell me?" part. I posted this question on a forum called /g/ first... haha. Sorry about that.

If I connect my microwave to my PC, will I be able to download food? I posted a question, haha


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#2
August 12, 2011 at 07:45:32
Problem: I can't download torrents at more than 2mbits without causing terrible server lag to the people on my Minecraft server.

Your torrents are sucking up all your bandwidth. This is normal and not at all unusual in a network with no limiting.

You have three choices here.

1) Stop downloading
2) Get a second, separate ISP connection for your torrents
3) Limit the amount of bandwidth your downloads get

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#3
August 12, 2011 at 08:02:09
I installed DD-WRT on my router because I heard it has a more configurable QoS system and it does.

I set Minecraft's port to "Premium" allocation in the QoS page and I'm still having the problem. Shouldn't this limit the torrent computer when the server requires bandwidth, or do I have to set a limit on the torrent computer too?

Thanks!

If I connect my microwave to my PC, will I be able to download food? I posted a question, haha


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