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Author Topic: Mining a computer lab -- bandwidth use  (Read 4559 times)
bitcoinafrica
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June 03, 2011, 04:41:58 PM
 #1

I have access to a computer lab that is rarely used. I want to use it to mine bitcoins. But before I dive deep into getting it all running, I'm curious about the feasibility.

My biggest concern is bandwidth. While nobody will care about the power consumption, there is VERY little bandwidth to go around. So how much bandwidth would 20 or so PCs take up?

I'm also not sure if it is even worth it. The computers are anywhere from 2 to 5 years old. But they aren't doing anything...even a few coins a week would be worth it.

I'd also be curious if there was a way to continue to cruch numbers while the internet is disconnected. But from what I've read about bitcoin thus far, I think the answer is no.

Any help appreciated. I'm hoping to turn this into a hybrid economics/IT lesson for some motivated students.

Thanks!
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Atroxes
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June 03, 2011, 04:44:47 PM
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The bandwidth use is next to nothing. If you 20 computers use more than 250MB per day in total, I'd be surprised.
RyNinDaCleM
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June 03, 2011, 04:51:56 PM
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I'd be more concerned about power consumption! Is this located somewhere that may monitor energy costs?

supa
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June 03, 2011, 04:53:18 PM
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See this thread -
http://forum.bitcoin.org/index.php?topic=11506.0

Before you get bumrushed by loonies.

The bandwidth usage is exceptionally low.  You may want to check for outbound firewall rules or prioritizing or use a pool that allows port 80 (like eligius!:))

bitcoinafrica
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June 03, 2011, 06:33:34 PM
 #5

Thanks for the replies everyone.

250MB a day? That's serious! I'm in a country where internet is a precious resource. I could maybe get by with 10 or 20 MB a day. Sad.

I'm going to start with 1 PC and investigate the usage. I'll report back.
wizang
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June 03, 2011, 07:07:05 PM
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If you think 250mb is a lot maybe you should seriously consider what the power usage is going to be. A computer at idle and at load use hugely different amounts of power. Especially if you're using GPUs... which btw, is really the only effective option.
bitcoinafrica
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June 05, 2011, 09:45:14 AM
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Where I am, the cost of power is heavily subsidized by the government, so it is quite cheap. Internet, however, is entirely unsubsidized and very expensive. The facility the lab is at is HUGE--I doubt anyone would notice the changes...we're talking aircon for hundreds of people.

It will be a week or so until I have time to set up one PC and see how much bandwidth it will use.
error
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June 05, 2011, 09:48:00 AM
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Where I am, the cost of power is heavily subsidized by the government, so it is quite cheap. Internet, however, is entirely unsubsidized and very expensive. The facility the lab is at is HUGE--I doubt anyone would notice the changes...we're talking aircon for hundreds of people.

It will be a week or so until I have time to set up one PC and see how much bandwidth it will use.

You could cut the Internet usage by running your own mining pool software on-site.

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aBitcoiner
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June 05, 2011, 11:20:22 AM
 #9

If you're mining using CPU, you'd be using more electricity than you would be gaining back from mining. That electricity has to come from somewhere, so someone is going to lose a lot of money. You might as well steal computer parts and sell them on ebay. You would cause less money to be lost and make more money for yourself.
bitcoinafrica
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June 05, 2011, 10:11:22 PM
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You could cut the Internet usage by running your own mining pool software on-site.

Yeah, if I had the technical expertise I'd be all over that. Any way I could easily implement this?
gnomehat
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June 05, 2011, 10:20:08 PM
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If you're mining using CPU, you'd be using more electricity than you would be gaining back from mining. That electricity has to come from somewhere, so someone is going to lose a lot of money. You might as well steal computer parts and sell them on ebay. You would cause less money to be lost and make more money for yourself.

Dude, his name clearly indicates that he's somewhere in Africa, and from his previous posts he has stated a couple times that power is not only cheap, but massively subsidized by the government.  This seems like one of the least wasteful uses of an African hydro subsidy I can think of, since if as he says he is using it for a lesson for some advanced students, this could be a great idea.  I'm going to assume this is somewhere in sub-sahara, as internet is super expensive down there.  If so, think of all the horrible multinationals that are using ENORMOUS amounts of that wasteful, subsidized power to further fuck up the landscape and subdue the local populace with shitty, dangerous mining and logging jobs.  There is absolutely nothing wrong with using power that would be wasted on planet-rape anyway to get a few bitcoins to use to teach some students both economics and comp-sci.

This sounds like an excellent idea, even if you get very few bitcoins, because I think it would be a really good teaching tool.  The whole concept of bitcoin is so fascinating, especially to someone who is already interested in computer technology.
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