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2781  Other / Beginners & Help / Re: 100% CPU bug on ATI on: November 18, 2011, 11:08:19 AM
11.6 (original, not 11.6b release) seems to work the best for most. If you have a multi-core CPU, you can force all your miners to run only on the same single CPU core by forcing CPU affinity. Here's a batch file that starts my miners as an example (if you are on Windows):

Code:
start /AFFINITY 01 c:\python27\python.exe phoenix.py -v -u http://user.name:pass@mineco.in:3000/ -k phatk2 VECTORS AGGRESSION=6 FASTLOOP=True WORKSIZE=256 PLATFORM=0 DEVICE=0

The affinity setting is actually a bitmask in hex, 01=CPU0, 02=CPU1, 03=CPU0+CPU1 etc.
I am also running Phoenix from source, not the binary, so correct the exe above if you are the other 99%.
2782  Other / Beginners & Help / Re: Transaction not appearing - do you have all blocks up to 153700+? on: November 18, 2011, 11:02:48 AM
It sounds like the solution you ask for, using your Bitcoin addresses on another computer, isn't really the problem you are having. It sounds like you don't have the complete blockchain downloaded yet. If you moved to another computer, you would have to start downloading from the beginning.

Here is a thread of interest to you: http://bitcointalk.org/index.php?topic=51456

If you do want to move all your bitcoins and account info to a new computer, the file to copy is %APPDATA%\Bitcoin\wallet.dat. Put it in the same place on the other computer (using the appropriate user name), and run Bitcoin.

2783  Other / Beginners & Help / Re: New to bitcoin software, trouble downloading blocks on: November 17, 2011, 03:50:31 PM
Why does noob double-post the same question, and then never log in again...?

For the same reason they admit the same question they are asking must have been asked a million times, but they can't be bothered to search for even one of those previous answers.
2784  Other / Beginners & Help / Re: Help! Re-loaded Bitcoin software but don't know how to integrate saved wallet on: November 17, 2011, 03:38:02 PM
Just a note, if your computer is spontaneously crashing or rebooting, then you likely have a hardware problem. I wouldn't store my money on such a system until it is fixed.

If the computer is fine until you run the CPU hard for a while (such as processing downloaded Bitcoin blocks), it could be a hardware fault as simple as a bad CPU fan. Download and run a burn-in stress test like OCCT on your computer overnight. The power supply test in this program will work your system hard, and likely crash it if there is a problem.
2785  Bitcoin / Development & Technical Discussion / Re: User directories on win32 on: November 17, 2011, 01:59:52 PM
I have found a concern relating to Bitcoin (all versions) on Windows on an active directory domain member.

The Bitcoin data directory is under %APPDATA%, an alias for CSIDL_APPDATA. On WinVista and Win7 this typically resolves to "C:\Users\{logon}\AppData\Roaming", on Win2000/XP to "C:\Documents and Settings\{logon}\Application Data".

The problem this presents is that this folder is used for roaming user profiles. When logging on to a domain that uses roaming profiles, the entire directory is synchronized with the server. This would mean sending up to 1GB of blockchain between the server and logon computer before the user can use their station. Admins may also opt to have the entire profile be a user network share without local storage.

In addition, this means that the private wallet data is stored on both the logon computer and the server. If the user logs on to another network machine, the user profile is then completely copied to the second machine. This also means anyone with "power user" rights can read the profile data on the second machine. This becomes less of a concern with an encrypted wallet, but you are still spreading your Bitcoin data anywhere you log in, with a copy for the admins to read too.

Windows Vista/7 have lessened the data transfer concern with the addition of %LOCALAPPDATA%, "C:\Users\{logon}\AppData\Local" typical. This is non-roaming profile data, used for caches, temp files, the entire install and user data of Google Chrome, etc. This seems like a more appropriate location for the Bitcoin data directory. For Win2000/XP/Me, the analogous location is C:\Documents and Settings\{logon}\Local Settings\Application Data, but XP doesn't have the environment variable. Here are some XP methods to determine the directory.

In this line of examination, one might wonder if it isn't appropriate to take all program data except the wallet out of userland. If Mom, Dad, and little Billy all use bitcoin with their own computer logins, there doesn't need to be three complete blockchain downloads. The program data could be moved to CSIDL_COMMON_APPDATA (C:\ProgramData), and the user data could be only the wallet, and perhaps a 'last_block' counter file that indicates for a rescan for any wallet transactions after the user's last seen transaction block; forces a complete rescan if the counter isn't present...

2786  Other / Off-topic / Re: 1GH/s, 20w, $500 — Butterflylabs, is it a scam? on: November 17, 2011, 01:11:09 PM
I'm glad they announced a public demonstration on the 25th though. At least we'll know approximately by then if it's a scam. Either they demonstrate on or around the 25th, or they are packing their bags right now and will be nowhere to be found on the 25th.
I don't know how a demonstration can be verified. When Steve Jobs unveiled the original Macintosh computer (64k), the demo unit that was up on stage was actually a one-of-a-kind 128k prototype, and the demo used all it's memory. The "$500" demo unit could have $1000 worth of FPGAs on it, or the miner source could have print "hashrate:", hash_rate*2, etc.
2787  Bitcoin / Bitcoin Discussion / Re: FinCEN renamed "stored value" to "pre-paid access", let's hire a lawyer! on: November 17, 2011, 11:46:06 AM
The u-wash-it car wash I go to issues tokens out of their change machine. Actually, their machine is loaded with a mix of quarters and tokens, so you don't know what you'll get. I can redeem those later for car wash service, or trade my extras at the car wash to the next guy that comes in. Time for a crackdown!
2788  Economy / Speculation / Re: Someone just took a gigantic dump. on: November 17, 2011, 11:22:37 AM
Giant douche:


Who is it? How about Tycho (deepbit pool admin). Lets analyze:

-Makes 3% (for proportional) or 10% (for PPS) on half of all the bitcoins mined,
-keeps all of half the transaction fees seen on the network,
-deepbit thread started June - ~150 days ago,
-hasn't logged into forums for two weeks (disinterest?)

Lets call it a conservative 2% of all bitcoins earned: 144 BTC a day x 100 days. 14,400 BTC. Nope, that's not enough to account for midnight dumping (35,000 in an hour).

Who else has the coins to sell? Art, Vlad, Tux? Mystery bubble sucker? Likely not "Satoshi", early coins have never been touched, so aren't on an exchange (unless the exchange has the whole wallets. It's feasible, since everything seems to start at Satoshi.) Is the seller awake in Japan?
2789  Economy / Gambling / Re: BITCOIN LOTTERY!!!! on: November 16, 2011, 11:26:10 PM
There's a problem with that though - a miner could target a specific nonce number while mining for the block.  If they win the block, they also win the lottery!
Good luck with that one! Even if you were deepbit, the nonce is randomly created by all mining software and is not 'forceable'. You would have to write a custom pushpool and custom mining software that would move the 'noncing' into the coinbase or such, and have Thash/s, to even have a whimper of a chance.

256 tickets and the last two digits of the hash then.
2790  Economy / Gambling / Re: BITCOIN LOTTERY!!!! on: November 16, 2011, 11:16:45 PM
Bitcoin has a random number generator that is not falsifiable and is widely available for all to verify. What you do is, say: ticket numbers are 0-499, winning ticket matches the last three digits of the nonce of block 155620 - (2016 blocks from now, should be ~14 days/Nov 30). Subtract -500 from nonce if last three digits over 499. Or (nonce)Mod(number_of_tickets) for an arbitrary number of tickets.

{
  "hash":"000000000000052292e0b44756ec93c37d9fa4e974c82b10f205cedfc241986b",
  "ver":1,
  "prev_block":"0000000000000434485ebbffcde54b1870c9598f2d5e50b3859770282a15d690",
  "mrkl_root":"2b537a8fec565e7ff4e1a535becb17f5edee621c01f15bfa3361b0041a43ddf1",
  "time":1321483525,
  "bits":437129626,
  "nonce":958058163,


Then people need to actually know what "ticket number" they got, a receipt should be digitally signed by raffle holder and include the number(s) and address that a winning payment would be sent to if won, so any claims of nonpayment can be verified as legitimate. The public key of the raffle holder should be held in an immutable location.

Then there is the "I sent payment but never got a ticket", or "raffle holder disappeared". Someone looking to exit the community with some profit could pocket everything and disappear if the the balance is not held in escrow (see mybitcoin.com).
2791  Bitcoin / Pools / Re: Bitcoins.lc - pool statistics for Jan-Nov on: November 16, 2011, 02:09:56 AM
I have been getting the JSON pool stats from bitcoins.lc every minute for the last four months, with a little stats scraper program I made. It appends the data to a CSV file. If you want to investigate a pool's stats for four months of mining, here you go (17,283,823 bytes CSV, 151,502 lines, 7-zipped to 1.17 MB): http://we.lovebitco.in/lc.StatsLog.138077-152915.7z

Data looks like this:
Code:
Date,Time,hash_rate,current_block,difficulty,active_workers,solved_blocks,total_workers,total_users,round_started,round_shares,valid_round_shares,total_shares,,
07-25-2011,22:07:09,469967251993,138077,1690895.803052,1757,338,17271,8701,1311655836,107612,86681,414730543,,
07-25-2011,22:08:10,475343119392,138077,1690895.803052,1756,338,17271,8701,1311655836,107612,109001,414730543,,
07-25-2011,22:09:10,475343119392,138077,1690895.803052,1756,338,17271,8701,1311655836,125163,109001,414730543,,
07-25-2011,22:10:11,475343119392,138077,1690895.803052,1756,338,17271,8701,1311655836,125163,126901,414730543,,
07-25-2011,22:11:11,483761255292,138077,1690895.803052,1764,338,17271,8701,1311655836,140840,126901,414757801,,
Date,Time: my local time UTC-7 and -8
round_started: unix epoch time in JSON

Note: a new round announcement is delayed in an odd way, stats keeps counting up shares as though they were contributed to the previous round for 1-3600 seconds. For analysis, you might need to use the block found time and recalculate the delayed stats.
2792  Bitcoin / Pools / Re: What does pool hopping look like? on: November 16, 2011, 01:43:37 AM
@deepceleron, did you get those graphs from the pool or a website that monitors pools? There was mPerth's stats which was a great resource, but it's been down a while now.
It's an unlinked-to page on a certain .lc domain pool's website.
2793  Bitcoin / Pools / Re: [67 GH/sec] MineCo.in - PPLNS 0% Mining on: November 16, 2011, 01:40:20 AM
The homepage is offline and the pool does not work also! Why?
Looking at the hashrate graph from earlier today, it looks like the pool was down for ~1 hr. Only Wuked would be able to answer this, and he hasn't checked this forum for two months (although he can occasionally be spotted in #mineco on freenode IRC).
2794  Economy / Economics / Re: How many bitcoins are made a day? on: November 16, 2011, 01:21:25 AM
There aren't 5 made a minute. Thats (sp) if you look at the averages.  50 are made about every 10 minutes.
2795  Other / Beginners & Help / Re: smart hostile takeover on: November 15, 2011, 06:11:51 AM
Lets assume you are a paid agent for one of the near monopoly power payment providers like MasterCard or visa:

How would you use lets say 5 million$ that the company has given you to destroy our communitys trust in bitcoin systematically?

If I had only $5 million, I wouldn't attack the currency directly. That's not enough money to do a successful attack. What I *would* do is use that $5 million to assemble a team of the best malware writers in the world and attack the shit of out the Bitcoin community.

TMA
How about a team of the the best hitmen and attack the shit out of the Bitcoin community...seems to work for lots of governments.

Or to roll that back, a team of the the best government lobbyists and attack the shit out of the Bitcoin community
2796  Economy / Auctions / Re: 5 BTC up for auction! Bidding starts at 1 BTC. on: November 15, 2011, 05:36:11 AM
This auction is over, I want to hear that Matoking got paid his 3.9 BTC. The only other bid from Cory doesn't qualify, his snipe bid was a second too late, and there was no second-place bidder. We could also call shenanigans, by rules (bid increment, end time) being added/changed mid-auction by OP.
2797  Bitcoin / Pools / Re: 'How to hop' blog on: November 15, 2011, 05:06:46 AM
PPLNS systems, as long as they cross rounds (which all do, there is no concept of pool rounds when distributing payments) are all fair payout methods that do not positively or negatively affect the part-time miner. Since the work you submit now determines your percentage of reward on future blocks until the work expires, you don't know when blocks will be found, and past block finding doesn't affect future payments, all contributed shares have equal expected value.

I think it may be possible to game 'decaying' value pools or get a different average reward than you deserve when part-time mining, which is non-ideal. Lets say you have three different accounts on one pool, and switch between accounts every hour. It would seem that under an exponentially decaying reward or other custom poorly-informed formula (don't know if any pools do this) your expected reward may be different than constantly mining one account. Just thinking that 'pulsing' your hashrate (intermittent mining), may get you more or less expected reward than constant mining, depending on the decay rate, when we want every submitted share to have the same expected return.

Upon reflection, it seems like the second paragraph's concern is also unfounded. As long as each share's value is independently evaluated, it shouldn't make a difference. If a pool has some other policy, like "if you leave for three hours your reward is cut in half", this would "connect" the value of shares you submit now to future shares you submit.
2798  Bitcoin / Pools / Re: [67 GH/sec] MineCo.in - PPLNS 0% Mining on: November 15, 2011, 04:49:11 AM
Just a bump, the pool is still running great, I am about 1% of the pools hashrate, and I get my ~.50 BTC every time a block is found, averaging about one a day. Big props to megauser boom, who found four blocks in a row with ~15GHash/s. My signature link is not because I am affiliated with the pool admin, just because it works!
2799  Other / Beginners & Help / Re: So I'm running a headless rig. how do I get the coins from a pool? on: November 15, 2011, 04:37:24 AM
I suggest that you look at a pool's guide to mining. Your mining computer runs software specifically for mining Bitcoins. You contribute work to the pool, and as the pool finds blocks, your account balance at the pool goes up. You can withdraw the bitcoins you've earned from the pool when you want, or you can set it up for automatic withdraws. You withdraw the coins to your own personal Bitcoin address, which can be Bitcoin running on any computer you want; you don't need multiple wallets or anything like that.
2800  Other / Beginners & Help / Re: Questions about selling items for BTC on: November 15, 2011, 04:31:35 AM
It depends more on what you are selling. Since Steam accounts were hacked, and buyers have already reported getting burned off stolen accounts, those are as poisonous as calling cards or offering PayPal for Bitcoin. If you are selling some material goods that cannot be hacked by Russian mobsters, then the chances are much higher of you being trusted.

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