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Author Topic: CPU Mining with the best of them  (Read 1329 times)
DJDD
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June 22, 2011, 10:43:00 PM
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So thanks to the market flash crash the other day Bitcoin has fallen back into my radar. I started reaeding about Mining and it just sounds plain FUN haha, so I'm going to give it a crack. I did almost an all-nighter the other night just reading (And downloading Bitcoin blocks  Tongue). I fully understand that GPUs run giant parallel circles around CPUs, but it just so happens that I have a whole bunch of quad-core Xeons available at no cost to me, and they're doing nothing right now.
I'm going to drop Unbuntu on them and run a CPU miner and see how it all pans out. A couple of questions:
1. I'll probably have about 10 workers. Should I start my own private pool server to better ditribute the load instead of solo mining on all the machines?
2. Obviously parallelism is key here. I wonder, should I run at least 1 worker per core? Or more? Has anyone done any CPU efficiency tests on this?

Software:
Pool: pushpoold + frontend
Miner: CPUMiner/Minerd

3. Its been a bit hard finding info on what software combo is best to run since CPU mining has largely fallen away, but does the above sound good? Just wondering what the best is.
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grue
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June 22, 2011, 10:45:11 PM
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if you pay for electricity, don't bother.

It is pitch black. You are likely to be eaten by a grue.

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Yatta99
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June 22, 2011, 10:53:32 PM
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You would probably be better off using ufasoft_bitcoin-miner than minerd. On my core 2 duo the ufasoft gave me about a 2.5x greater hash rate (990kH/s boosted to 2.6MH/s per core). Try both and see what works best for you  Cool

Tips for new box to: 16s14wcsNo5TcdsGLttL7B1XWiCv8E4L6A
BinaryMage
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June 22, 2011, 10:57:59 PM
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Okay, answers to your questions:

1. Use GUIMiner with Ufasoft's SSE2 CPU miner, get it here.

2. Solo mining will get you nowhere. You'll need to mine in a pool, like Deepbit.

3. As for parallelism, I would just run one worker per computer, Ufasoft's miner scales nicely on multiple cores.

-- BinaryMage -- | OTC | PGP
DJDD
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June 23, 2011, 02:03:04 AM
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From everything I've read thus far, pool mining isn't always the best way. It sounds like if you can attain a certain amount of mHashes/s (5000?), that would be good enough for solo/private pooling. Is this a correct assumption?
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June 24, 2011, 04:53:24 PM
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From everything I've read thus far, pool mining isn't always the best way. It sounds like if you can attain a certain amount of mHashes/s (5000?), that would be good enough for solo/private pooling. Is this a correct assumption?

Well, it depends how much variance you can tolerate. When solo mining, you might solve the block in twenty minutes, or you might solve it in two years.

-- BinaryMage -- | OTC | PGP
Gabi
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June 24, 2011, 04:57:16 PM
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Okay, answers to your questions:

1. Use GUIMiner with Ufasoft's SSE2 CPU miner, get it here.

2. Solo mining will get you nowhere. You'll need to mine in a pool, like Deepbit.

3. As for parallelism, I would just run one worker per computer, Ufasoft's miner scales nicely on multiple cores.
I quote him

From everything I've read thus far, pool mining isn't always the best way. It sounds like if you can attain a certain amount of mHashes/s (5000?), that would be good enough for solo/private pooling. Is this a correct assumption?
Well it's more like, if you really have a LOT of hashing power then there is not a big difference but being in a pool don't give you disadvantages, except a fee if you join a pool with a fee
Bastet
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June 24, 2011, 05:27:48 PM
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Got 54MH/s on dual Xeon 7350s (16 theads) on one machine which was better than an ATI 4xxx I had which only did 11MH/s.
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June 24, 2011, 05:36:16 PM
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Mind sending me one of those xeons? I could use a nice home server haha  Wink

-Limb
fascistmuffin
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June 24, 2011, 05:43:25 PM
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Quote
... but it just so happens that I have a whole bunch of quad-core Xeons available at no cost to me, and they're doing nothing right now...

Sounds like someone else really wants to get fired for using their work's equipment for bitcoin mining.
scooterking
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January 06, 2013, 02:26:18 AM
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Got 54MH/s on dual Xeon 7350s (16 theads) on one machine which was better than an ATI 4xxx I had which only did 11MH/s.

Tell me how you did that?  very eager to know!!

Thanks!
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