Just a quick note to people complaining that my prices are high. Apparently it is possible to get some GPU hosting with GPU clouds like Amazon, Peer1 etc...
The only problem is that on per Ghps basis my prices are about 10-20 times cheaper than those from Amazon and peer1 and I suppose all other known non "mom's basement" type of competitors.
The price difference is so overwhelming that I could not even be bothered to calculate exact numbers yet.
Yeah. It's like saying that your $10/liter gas is cheap because, you know, your only other choice is to burn perfumes and it's 1000$/liter. Your prices are high because at difficulty 50000+ which is going to be in the next reset in 3-4 days, your 3-month 1GH/s = 7.88 PH contract is going to generate only 1835 BTC assuming no further difficulty increases (we all know how likely it is). At $2100 for no more than 1835 BTC (and likely 1000 BTC only due to further difficulty increases), it is much cheaper to buy coins on the market. If your service is popular it can only mean that there is apparently ample supply of people who cannot count people who have not grasped the Bitcoin difficulty adjustment formula, yet. |
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This is probably just variance.
A bit. But last 24 hours network hashspeed is 399 GH/s anyway which corresponds to difficulty 55702. For a broader perspective, at difficulty of 100k, the network speed will be roughly equal to Tianhe-1A, the fastest supercomputer and at difficulty 200k roughly to Folding@Home, the most popular distributed computing project. This is no longer small potatoes and we are very close. But I wonder if anyone is surprised. The BTC jump to parity made mining extremely profitable (and I laugh at anybody who thinks it's good for him because due to resulting increase in difficulty, the individual mining output drops significantly). A lot of new people started mining (you can count mining related posts on the forum) and lot of people increased their previous mining capacity. If the BTC price stays the same, the increases in difficulty will slow down after about 50% jump during the upcoming round and likely 30%+ for the next one. |
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mahkul@szafir:~/Downloads/bitcoin-0.3.19/bin/32$ sudo aticonfig --odgt
No protocol specified
ERROR - X needs to be running to perform ATI Overdrive(TM) commands
mahkul@szafir:~/Downloads/bitcoin-0.3.19/bin/32$
Is sudo access not enough for this? Do I need to be logged in as root himself? I guess the environmental variable is not set correctly when sudoing. Try $ sudo bash
# export DISPLAY=:0
# aticonfig --odgt
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The following thought has crossed my mind: "Maybe the SHA256 algorithm isn't as truly random as is thought, and there is some sort of bias against results with so many zeroes in the beginning, and the total hash power on the network is greater than estimated, and mine is therefore a smaller proportion than I thought".
Not that I seriously suspect this to be the case...
There is no known bias in sha256. The problem is that you have to have tens of thousands of blocks found to be within 1% of theoretical value. Even after 100 blocks, there is 17% probablility of finding 10% less blocks than the average value. With 10000 blocks found, you have 16% of getting 99% of the theoretical value. Every time you double your theoretical blocks number, you have sqrt(2) less variance. I run a modified miner that prints all hashes with difficulty one. And after collecting more than 200k of such results, it agrees with the printed hashrate to less than 0.2%. Imagine running this experiment with the current difficulty. |
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Is there any way to permanently set the clock (aticonfig --odsc=x,x) and fanspeed values so that they don't change after the reboot?
Fanspeed, no: resets after each X restart to auto. Clock, yes: aticonfig --odcc --adapter=all
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Slush keeps the 10% for himself
You mean he keeps more than the advised 2% ? No, it means caucasius is not aware variability can be that high. Slush's pool has some daily variability. Bad day for the pool, and your mining income can be 20% lower. |
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I've never ever seen any liquid cooled rigs deployed in datacenters. There are must be a reason why pros do not do liquid cooling generally.
It's simple. Liquid cooling makes sense if you want silent machine. In datacenters nobody cares about noise. And liquid cooling is more expensive than air. |
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As mentioned above, due to change transactions and people shuffling bitcoins between different computers they own, the real transaction volume is likely less than 5% of the value displayed on bitcoinwatch. You are grossly overestimating the BTC trade volume.
Heck, bitcoin faucet pays 0.05 BTC hundreds times a day and results in about 200 BTC per transaction due to 2xx.xx BTC change.
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Hm, so what is the "own X screen" thing? In fact at least the aticonfig utility worked as root. I tried running poclbm as root, but then of course it failed because root doesn't have the SDK variables set (I suppose). Maybe it would have worked as root
It would have worked if you had set LD_CONFIG_PATH and DISPLAY variables. The confusing thing was that if I tried to ssh before logging in on the PC, it wouldn't work (poclbm would only find the CPU), and once I logged in on the PC it would work. So I guess by logging in on the PC directly (without ssh), I got to "own the X screen"? I always used the export DISPLAY=:0 line...
X server is what controls the screen. If you do not log in through console and start your gnome session, it is "owned" by gdm, the display that shows login prompt. Since you do not control the screen, you cannot send commands to the graphics card. Either you need to login via console (and then the operating system recognizes that you control the screen), or mine as root that can do anything. However, I already sent 10 BTC to Raulo because I promised to send some coins in the other threat about basic setup.
I wish I already had more BTC to spend :-)
Thanks. I wish you luck. |
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Any ideas what might be causing the problems with ssh?
DISPLAY and SDK paths are all you need. And if you do not own X screen (i.e., did not logged in via console before), you have to be root. What errors do you have? Is there a straightforward way to turn the log file into a rotating log?
Without killing poclbm, you would have to modify the poclbm source to log into files. If you don't mind killing poclbm, this script would do the trick #!/bin/bash
#adjust the step to your needs
step=86400
while true; do
suffix=`date +%s`
name=mininglog.$suffix
echo $suffix >$name
date >>$name
./poclbm.py -v -f 2 -d 1 -o *** -p 8332 -u **** --pass=**** -w 128 -r 60 >>$name &
sleep $step
# killing the old miner
ps auxw |grep poclbm|grep 8332|awk '{print $2}' |xargs kill
# put date
date >>$name
date +%s >>$name
done
It will create a log with Unix time as the suffix and will add starting and ending timestamps to the log. P.S. I don't claim the original bounty. It should go to gusti. |
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Doing that only does not work with e.g. DiabloMiner
You need to call the start script from a 2nd. machine
Original poster asked for poclbm. I can only confirm that a script in /etc/rc.local that sets DISPLAY and SDK paths works. Just tested. For two cores, one has to run each separately in background ./poclbm -d 1 -params > output1 2>&1 &
./poclbm -d 2 -params > output2 2>&1 &
The same script can set fan speed (which resets each Xorg restart). |
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Any script that sets SDK library paths, DISPLAY=:0 and runs as root should do the trick. edit: export DISPLAY=:0
export LD_LIBRARY_PATH=/path/to/sdk:$LD_LIBRARY_PATH
pocmldir/poclbm.py --parametes
Put the script is some file and run it from /etc/rc.local I'll test it and post it after I reboot the machine  |
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I will do it for $100. I know it's a high price, but the overall trend is for the bitcoin price to be rising rapidly.
This is not expensive. It would suggest implied volatility of about 145% which is not much based on daily bitcoin variability. |
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Ever heard about hedging? Why do you think I do not mine on my own too? Saying that I am shorting bitcoins is about the same as saying that wheat farmers are shorting wheat.
Of course you are mining on your own because there is no better way to utilize your spare capacity. But you wouldn't set up this whole business if it was just for hedging. I admit that without ability to borrow BTC's shorting them is easier said than done.
Shorting such an illiquid market is a stupid idea unless you are large enough to manipulate it. One single idiot with not too much money can force a big fat margin call on you. And also market can be irrational longer than you can stay solvent. Don't all of you get me wrong. I wish Bitcoin success. It's a clever idea. But pumping the BTC price is not a way of achieving it. We'd better have relatively stable BTC prices and growing bitcoin economy than a crazy bitcoin gold rush and later bubble burst. |
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I'm sorry but bitcoin has zero intrinsic value. Just like fiat.
Why dont you put your money where your mouth is and short BTC on mtgox? Let us know how it goes.  Says someone who effectively shorts BTC by selling mining contracts instead of mining on his own. You believe in bitcoin so much that you'd rather have payment upfront with fixed prices. Oh, irony. By the way, care to explain how to short BTC on mtgox? Without having them? |
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Dollar/Euro has value ONLY because government says so.
Bitcoin/gold/silver etc have value, because people believe so.
That is nothing like fiat.
No. US government can claim anything about US dollar in the USA. They can force you to anything. But abroad, US dollar is valuable because there is an economy that supports it and indeed people believe it's valuable. |
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As much as we all dream about ever rising bitcoin value,
there is not a single financial or commodity or land or housing market that goes up in a straight line.
So you suggest that eventually everything goes up just not in straight line? And how long must the leg down be to decide that it is no longer going up? I'm sorry but bitcoin has zero intrinsic value. Just like fiat. The only thing that makes it valuable is the supporting economy of goods and services that can be traded for bitcoin. Growing a bubble is not going to strengthen it. And there is a lot of bubble mentality on this forum. Like this post: http://bitcointalk.org/index.php?topic=3713.msg52668#msg52668If bitcoin continues to go up in value without the bitcoin economy following, it will finally crash. And if the mass market learns that bitcoin is another "beanie babies", it will never become a global medium of exchange. It will remain a toy for geeks. |
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all this is completely normal in financial markets and has nothing to do with bubbles or bubblegums ;-)
Yeah, because as we all know bitcoins can only go up. Buy now or be priced out forever. The bitcoin supply is finite and the demand is infinite. Just like houses. You know, they are making no land anymore. There are never any bubbles in the markets and everyone will be rich. You just need to buy. |
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[Value of a BTC will always be related to the cost of power to produce it, since that's directly related to difficulty, which in turn is related to Bitcoin's popularity
Wrong because it is other way round. Difficulty is related to profitability of mining but BTC price is supply and demand on the market. BTC can rise or can drop and difficulty can adjust accordingly. Nobody knows what the price of BTC will be. Anybody who claims otherwise is either a fool, tries to pump the value of his holdings, or both. |
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Also, I'm wondering just how lucky I was, since that's basically 3 blocks after another being generated in less than average time. If the chance of finding a block with my calculation rate in 2days were 10%, then the chance of finding 3 blocks this quickly would be less than 0.1%. Quite strange if you ask me.
You were lucky but not that lucky. The probability is described by Poisson distribution. The probability of getting at least 3 blocks when only 0.5 were expected on average is 1.4% http://stattrek.com/Tables/Poisson.aspx |
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