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Author Topic: [CLOSED] BTC Guild - Pays TxFees+NMC, Stratum, VarDiff, Private Servers  (Read 829297 times)
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Herp-a-derp
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July 16, 2013, 06:11:11 PM
 #2961

Hi,

My mining proxy is constantly disconnecting and reconnecting to the eu-stratum server and my cgminer workers are often rejecting shares due to 'lowdifficulty'.

When my proxy does submit shares, they rocket over to the server between 14-30ms.

I have just left Slush and everything was working was working well over there, just wondering if there is something I am doing wrong, perhaps an extra flag I need to specify? Or perhaps the pool is having issues at the moment?

Any help greatly appreciated.

Proxy version 1.5.2 and cgminer version 3.1.1

Thanks.
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eleuthria
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July 16, 2013, 08:10:24 PM
 #2962

Hi,

My mining proxy is constantly disconnecting and reconnecting to the eu-stratum server and my cgminer workers are often rejecting shares due to 'lowdifficulty'.

When my proxy does submit shares, they rocket over to the server between 14-30ms.

I have just left Slush and everything was working was working well over there, just wondering if there is something I am doing wrong, perhaps an extra flag I need to specify? Or perhaps the pool is having issues at the moment?

Any help greatly appreciated.

Proxy version 1.5.2 and cgminer version 3.1.1

Thanks.

No issues visible on the pool.  It sounds like cgminer is considering the server dead due to frequent rejects (lowdifficulty).  Are you turning on a HUGE amount of hash power at once?  If so, consider increasing your minimum difficulty settings to reflect that so the server starts you out higher than diff=1.  The pool is very aggressive at initial difficulty tuning, but I can imagine a large farm connecting through a single cgminer instance might get disconnected due to a huge number of diff=1 lowdifficulty rejects.

Send me a PM with a few more details and I'll see if I can help set you up.

R.I.P. BTC Guild, 2011 - 2015.
BTC Guild Forum Thread
eleuthria
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July 16, 2013, 08:23:21 PM
 #2963

The hot wallet got very low due to some large withdrawals recently.  Since the last loss of coins, I've been purposely keeping the wallet much lower.  A few users that were carrying large balances withdrew in the last 24 hours, which caused the problem.

Over the next 10 minutes I will be manually processing the failed transactions.

Update:  All failed payouts have been manually re-issued.  Transaction ID + Blockchain.info links will now link you to the completed transactions.  Sorry for the trouble, and I hope you all understand the security reasons for why these payouts failed.

R.I.P. BTC Guild, 2011 - 2015.
BTC Guild Forum Thread
eleuthria
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July 16, 2013, 09:39:54 PM
 #2964

Update to USB Block Erupter Policy

Going forward, future units will no longer be individually tested prior to shipping.  This was originally done to protect users from receiving a Dead on Arrival unit (~1% chance).  I would hate to wait 1-2 weeks after ordering, only to receive a dead unit, and then wait another 1-2 weeks to return the unit + get a new one back, during which time difficulty will have increased again.

The new policy is as follows:

1) Units will be shipped out untested until orders slow down enough to where testing individual units is not going to slow down shipping.  This will speed up clearing out the backlog significantly.
2) If a unit arrives and does not work, you will pay return shipping of the defective unit.
3) I will test the defective unit when it arrives.  If it works without issue on my testing system, I will not reimburse for return shipping, but will ship another brand new unit back.
4) If the unit is confirmed defective, you will be reimbursed for return shipping, AND the two weeks of mining revenue that you lost while waiting during the return process.


The above eliminates the unfair burden of ending up in the unlucky ~1% of defective units without the requirement of testing every unit prior to shipping.  Your unit will be replaced, and you will receive a reimbursement equal to what you would have earned if the unit had been mining the entire time.

R.I.P. BTC Guild, 2011 - 2015.
BTC Guild Forum Thread
twmz
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July 16, 2013, 10:13:49 PM
 #2965

3) I will test the defective unit when it arrives.  If it does not work, I will not reimburse for return shipping, but will ship another brand new unit back.

Typo above?

Was I helpful?  1TwmzX1wBxNF2qtAJRhdKmi2WyLZ5VHRs
WoT, GPG

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eleuthria
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July 16, 2013, 11:14:43 PM
 #2966

3) I will test the defective unit when it arrives.  If it does not work, I will not reimburse for return shipping, but will ship another brand new unit back.

Typo above?

Corrected.  Thank you.

R.I.P. BTC Guild, 2011 - 2015.
BTC Guild Forum Thread
centove
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July 16, 2013, 11:23:01 PM
 #2967

Update to USB Block Erupter Policy

1) Units will be shipped out untested until orders slow down enough to where testing individual units is not going to slow down shipping.  This will speed up clearing out the backlog significantly.


Next year sometime?? Tongue


Give me Btc: 1BRkf5bwSVdGCyvu4SyYBiJjEjbNiAQoYd Mine on my node: http://ask.gxsnmp.org:9332/
os2sam
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July 16, 2013, 11:25:24 PM
 #2968

50Ths Pool??  Would anyone had thunk it a couple years ago?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
eleuthria
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July 16, 2013, 11:32:42 PM
 #2969

50Ths Pool??  Would anyone had thunk it a couple years ago?

Funny enough, I learned about Bitcoin from the Security Now podcast.  While testing chips I was going crazy, so I've been listening to podcasts and audio books.  For fun yesterday, I turned on the old Security Now podcast that goes over Bitcoin.  Steve mentioned in the video (sounding quite amazed) that the network speed was estimated to be 186 GIGA hashes per second at the time.  Amazing how far it's come in 2 and a half years.  Each of the top 50 users of the pool are now faster than the entire network was back then.

R.I.P. BTC Guild, 2011 - 2015.
BTC Guild Forum Thread
Miner-TE
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July 16, 2013, 11:39:41 PM
 #2970

That is funny.  I also learned about Bitcoin from Security Now and immediately pointed a CPU at Slush...

Those were the days .... February 9Th 2011   Smiley

http://twit.tv/sn287

BTC - 1PeMMYGn7xbZjUYeaWe9ct1VV6szLS1vkD - LTC - LbtcJRJJQQBjZuHr6Wm7vtB9RnnWtRNYpq
SolarSilver
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July 16, 2013, 11:41:12 PM
 #2971

Each of the 50 users of the pool are now faster than the entire network was back then.

Please tell use that is "Each of the top 50 users of the pool" :-)
eleuthria
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July 16, 2013, 11:43:07 PM
 #2972

Each of the 50 users of the pool are now faster than the entire network was back then.

Please tell use that is "Each of the top 50 users of the pool" :-)

It's been a LONG couple of days!  Fixed Tongue.

R.I.P. BTC Guild, 2011 - 2015.
BTC Guild Forum Thread
os2sam
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July 17, 2013, 12:23:55 AM
 #2973

That is funny.  I also learned about Bitcoin from Security Now and immediately pointed a CPU at Slush...

Those were the days .... February 9Th 2011   Smiley

http://twit.tv/sn287

That's when I learned of Bitcoin as well.  I'm still kicking myself for procrastinating for 3 or 4 months before getting started. Smiley

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
razorfishsl
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July 17, 2013, 12:34:35 AM
 #2974

The great thing about Crypto currencies is that.... There is a new one every day....

Still plenty of time to jump under that band wagon....

High Quality USB Hubs for Bitcoin miners
https://bitcointalk.org/index.php?topic=560003
eleuthria
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July 17, 2013, 05:17:30 AM
 #2975

Updates to the store.  Shipping queue position now updates every time an order is shipped, rather than in batches when I manually update the queue.  Additionally, the backorder queue is doing the same, so you can see the backorder queue continue to drop as orders move out Smiley.

R.I.P. BTC Guild, 2011 - 2015.
BTC Guild Forum Thread
Trongersoll
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July 17, 2013, 07:13:01 PM
 #2976

I've got a question that i probably shouldn't ask, depending on the answer.  Tongue Proof of Work. does the pool software verify that every returned hash from the individual miners is a valid response and not just some made up number? Considering the high hash rates it seems to me that this would require quite a bit of computing power, but on the other hand it wouldn't be hard to modify a mining program to spoof the results providing a much higher appearing hash rate.

*insert appropriate begging line here* 
BTC: 1CS6AV7VnjcPLxaTFoUhTjXK4mQCTzfSxE
Doge: DB22tiynvXKg7SyPpnH9jyfitKLTZb6ejc
wtfvanity
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July 17, 2013, 07:21:41 PM
 #2977

I've got a question that i probably shouldn't ask, depending on the answer.  Tongue Proof of Work. does the pool software verify that every returned hash from the individual miners is a valid response and not just some made up number? Considering the high hash rates it seems to me that this would require quite a bit of computing power, but on the other hand it wouldn't be hard to modify a mining program to spoof the results providing a much higher appearing hash rate.

Yes they are checked. Verification time is orders of magnitude quicker than finding the proof of work.

          WTF!     Don't Click Here              
          .      .            .            .        .            .            .          .        .     .               .            .             .            .            .           .            .     .               .         .              .           .            .            .            .     .      .     .    .     .          .            .          .            .            .           .              .     .            .            .           .            .               .         .            .     .            .            .             .            .              .            .            .      .            .            .            .            .            .            .             .          .
eleuthria
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July 17, 2013, 07:56:31 PM
 #2978

I've got a question that i probably shouldn't ask, depending on the answer.  Tongue Proof of Work. does the pool software verify that every returned hash from the individual miners is a valid response and not just some made up number? Considering the high hash rates it seems to me that this would require quite a bit of computing power, but on the other hand it wouldn't be hard to modify a mining program to spoof the results providing a much higher appearing hash rate.

Yes they are checked. Verification time is orders of magnitude quicker than finding the proof of work.

Expanding upon this:  A 1 GH/s miner is doing 1,000,000 Double-SHA256 hashes per second.  It will submit work every 4 seconds (assuming diff=1).  The server does *one* Double-SHA256 hash to verify the work.  Of course, the server is doing that over CPU, but even a CPU (server-grade) is capable of doing a couple million per second.

R.I.P. BTC Guild, 2011 - 2015.
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Trongersoll
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July 17, 2013, 08:25:47 PM
 #2979

I've got a question that i probably shouldn't ask, depending on the answer.  Tongue Proof of Work. does the pool software verify that every returned hash from the individual miners is a valid response and not just some made up number? Considering the high hash rates it seems to me that this would require quite a bit of computing power, but on the other hand it wouldn't be hard to modify a mining program to spoof the results providing a much higher appearing hash rate.

Yes they are checked. Verification time is orders of magnitude quicker than finding the proof of work.

Expanding upon this:  A 1 GH/s miner is doing 1,000,000 Double-SHA256 hashes per second.  It will submit work every 4 seconds (assuming diff=1).  The server does *one* Double-SHA256 hash to verify the work.  Of course, the server is doing that over CPU, but even a CPU (server-grade) is capable of doing a couple million per second.

Thanks for the answer, i hoped that this was the case. Just noticed on another pool that when a large percentage of hashing was added all at once, instead of the number of blocks found during a day going up, the luck went down instead. I was just contemplating how one could make that happen and i came up with spoofing the pool.

*insert appropriate begging line here* 
BTC: 1CS6AV7VnjcPLxaTFoUhTjXK4mQCTzfSxE
Doge: DB22tiynvXKg7SyPpnH9jyfitKLTZb6ejc
wtfvanity
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July 17, 2013, 09:09:03 PM
 #2980

I've got a question that i probably shouldn't ask, depending on the answer.  Tongue Proof of Work. does the pool software verify that every returned hash from the individual miners is a valid response and not just some made up number? Considering the high hash rates it seems to me that this would require quite a bit of computing power, but on the other hand it wouldn't be hard to modify a mining program to spoof the results providing a much higher appearing hash rate.

Yes they are checked. Verification time is orders of magnitude quicker than finding the proof of work.

Expanding upon this:  A 1 GH/s miner is doing 1,000,000 Double-SHA256 hashes per second.  It will submit work every 4 seconds (assuming diff=1).  The server does *one* Double-SHA256 hash to verify the work.  Of course, the server is doing that over CPU, but even a CPU (server-grade) is capable of doing a couple million per second.

Thanks for the answer, i hoped that this was the case. Just noticed on another pool that when a large percentage of hashing was added all at once, instead of the number of blocks found during a day going up, the luck went down instead. I was just contemplating how one could make that happen and i came up with spoofing the pool.

Search the forums for a little bit. Something that has been discussed is where a miner adds a bunch of hashing power with a modified miner, and instead of submitting all shares, they just submit shares that are > than the minimum, but less than a full block. So if they add say a terahash of mining, they should be finding blocks every so often. But instead of actually submitting those shares, they withhold them.

Most pools have mechanisms in place for identifying such situations, but a lot of smaller ones or pop up alt coins ones probably haven't even considered it.

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