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Author Topic: [1500 TH] p2pool: Decentralized, DoS-resistant, Hop-Proof pool  (Read 2032656 times)
kano
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August 13, 2013, 11:02:44 AM
 #6421


Get an RPi ~$50+ and it will run linux and mine on all those devices ... and never shutdown at 3am doing windows updates (that you'll have to know how to deal with) ... and not detect cgminer as a virus (that you'll have to know how to deal with) ... and not need buying the OS and updating the hardware (or wiping and reinstalling windows that you'll need to know how to deal with) every couple of years due to windows slowing down to a crawl ...


If any of this happens to you, you should definitely stick to Linux, because you suck at running Windows.   Kiss
It will definitely happen to anyone who thinks Zadig is too complex to follow the simple instructions I wrote in the cgminer READMEs

Pool: https://kano.is BTC: 1KanoiBupPiZfkwqB7rfLXAzPnoTshAVmb
CKPool and CGMiner developer, IRC FreeNode #ckpool and #cgminer kanoi
Help keep Bitcoin secure by mining on pools with Stratum, the best protocol to mine Bitcoins with ASIC hardware
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HellDiverUK
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August 13, 2013, 12:05:20 PM
 #6422

If you need to read a readme to get it working, it's too complex by default.  Grin
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August 13, 2013, 03:18:19 PM
 #6423

log:2013-08-13 08:54:28.443218  Shares: 1 (0 orphan, 0 dead) Stale rate: ~0.0% (0-80%) Efficiency: ~119.2% (24-120%) Current payout: 0.0156 BTC
log:2013-08-13 08:54:43.445825  Shares: 2 (0 orphan, 1 dead) Stale rate: ~50.0% (9-91%) Efficiency: ~59.6% (11-108%) Current payout: 0.0156 BTC
log:2013-08-13 08:56:13.468986  Shares: 2 (0 orphan, 1 dead) Stale rate: ~50.0% (9-91%) Efficiency: ~59.6% (11-108%) Current payout: 0.0156 BTC
log:2013-08-13 08:56:28.472261  Shares: 2 (0 orphan, 2 dead) Stale rate: ~100.0% (34-100%) Efficiency: ~0.0% (0-78%) Current payout: 0.0156 BTC

......

I'm curious as to how something like that happens?  Essentially some share from 2 minutes earlier was moved from OK to DOA?  It initially reported it as DOA, too.  (i'll refrain from posting more, the log is at www.nogleg.com/log)

Also, is there some setting I have messed up where it doesn't work properly with ASICs, or?  (re 3 out of 4 DOA)

(ed: I guess from looking at the graph it could have just been bad luck, looks like about 13% DOA)

oh, I'm also testing something at nogleg.net:9332 that may be faster (the blocksize is just at 1000 temporarily)

Dacentec, best deals for US dedicated servers. They regularly restock $20-$25 Opterons with 8-16GB RAM & 2x1-2TB HDD's (ofc, usually lots of other good stuff to choose from).  I did a Serverbear benchmark of one of my $20/mo Opteron (June last year), it's here.  Have had about a half dozen different servers with Dacentec, & none have failed to sustain at least 40MB/s (burst higher). My favorite is a 12-month rent-to-own ZT Systems 2XL5520 16GB 2x2TB SATA for $40/month (got lucky with the 'off-brand', haven't seen a RTO 2xL5520 for under $50/mo since -- at least for monthly contracts).  wholesaleinternet.com has some ancient 2-core intel CPUs @ $10/mo sometimes (I got an Intel Core 2 6300 @ 1.86GHz, with a 250GB HDD with 46000 hours on it, LOL. $20 @ Dacentec is much better, if you can grab one). joesdatacenter.com (same location as Wholesale Internet) also occasionally has specials (or if you don't want to wait, it has an AMD Opteron 170 @ $16/mo).
centove
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August 13, 2013, 05:08:09 PM
 #6424

While chasing some other unrelated issue I found the following nodes haven't bothered upgrading yet:
Code:
107.23.239.94
108.23.226.104
118.208.155.250
118.208.3.142
128.250.61.122
128.84.98.23
132.187.207.113
178.208.137.77
178.219.102.86
184.185.89.116
195.162.48.78
198.144.178.100
198.211.112.91
199.21.86.50
202.60.68.242
213.112.114.73
218.104.84.203
222.83.251.105
46.170.233.26
46.23.72.52
47.67.129.61
58.210.65.114
59.167.237.19
63.246.129.56
69.47.57.170
76.117.124.58
79.140.64.11
86.50.113.159
87.244.203.17
88.190.229.196
88.190.60.96
91.127.111.209

Magical incantation to produce said list:
Code:
data/bitcoin$ grep peer log | grep "p2pool version: 1100"  | awk '{print $7}' | cut -d ':' -f1 | sort | uniq


Give me Btc: 1BRkf5bwSVdGCyvu4SyYBiJjEjbNiAQoYd Mine on my node: http://ask.gxsnmp.org:9332/
Krak
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August 13, 2013, 05:28:58 PM
 #6425

If you need to read a readme to get it working, it's too complex by default.  Grin
According to that logic, p2pool and pretty much every other piece of mining software (except maybe BitMinter) are too complex. Cgminer is extremely easy to figure out even with the readmes.

BTC: 1KrakenLFEFg33A4f6xpwgv3UUoxrLPuGn
TierNolan
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August 13, 2013, 09:42:31 PM
 #6426

Is there any documentation explaining exactly how the system works?

How is initial chain syncing accomplished?

Only 1 day is kept, so how does a new peer distinguish which is the correct sharechain, since it can't trace back to genesis?

Mining a sharechain that dies means that you share any winnings, but then there are no later winners to share back with you.

Is there persistence for the sharechain?

Does restart the p2pool daemon mean it has to re-acquire the sharechain from scratch?

What are "heads" and "tails" (and what are "verified heads" and "verified tails")?

Why is the difficulty of the sharechain not linked directly to the main chain's difficulty?

Related to that is why not just keep 24 hours worth of main chain blocks?

1LxbG5cKXzTwZg9mjL3gaRE835uNQEteWF
Krak
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August 13, 2013, 10:32:03 PM
 #6427

Is there any documentation explaining exactly how the system works?

How is initial chain syncing accomplished?

Only 1 day is kept, so how does a new peer distinguish which is the correct sharechain, since it can't trace back to genesis?

Mining a sharechain that dies means that you share any winnings, but then there are no later winners to share back with you.

Is there persistence for the sharechain?

Does restart the p2pool daemon mean it has to re-acquire the sharechain from scratch?

What are "heads" and "tails" (and what are "verified heads" and "verified tails")?

Why is the difficulty of the sharechain not linked directly to the main chain's difficulty?

Related to that is why not just keep 24 hours worth of main chain blocks?
This link should answer most of your questions. There's an error on the wiki though; the share chain difficulty is adjusted so that a share is found every 30 seconds now, not 10 seconds (for ASIC compatibility).

BTC: 1KrakenLFEFg33A4f6xpwgv3UUoxrLPuGn
TierNolan
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August 13, 2013, 11:02:51 PM
 #6428

This link should answer most of your questions. There's an error on the wiki though; the share chain difficulty is adjusted so that a share is found every 30 seconds now, not 10 seconds (for ASIC compatibility).

I was looking for a little more info than that, but thanks for the link.

Quote
How is initial chain syncing accomplished?

I think this has to do with the verification system.  Shares are compared to main chain blocks somehow?

What happens during the period until initial verification?

From what I can see, the node effectively solo mines, until it is sure that the sharechain is valid.

I think explaining "verified" heads and tails (what are heads and tails?) would give the info.

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forrestv
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August 14, 2013, 03:05:20 AM
 #6429

How is initial chain syncing accomplished?

Nodes download the most recent portion of the sharechain from their peers.


Only 1 day is kept, so how does a new peer distinguish which is the correct sharechain, since it can't trace back to genesis?

From the wiki:
Quote
Unlike Bitcoin, nodes do not know the entire chain - instead they only hold the last 8640 shares (the last day's worth). In order to prevent an attacker from working on a chain in secret and then releasing it, overriding the existing chain, chains are judged by how much work they have since a point in the past. To ascertain that the work has been done since that point, nodes look at the Bitcoin blocks that the shares reference, establishing a provable timestamp. (If a share points to a block, it was definitely made after that block was made.)


Mining a sharechain that dies means that you share any winnings, but then there are no later winners to share back with you.

Is there persistence for the sharechain?

Does restart the p2pool daemon mean it has to re-acquire the sharechain from scratch?

Yes, you're mining on the assumption that the pool is not going to disappear while your shares are valid. I'm not sure exactly what you mean with the second question, but the sharechain is persisted to disk, so when you restart your node, it only has to download shares since it was stopped.

What are "heads" and "tails" (and what are "verified heads" and "verified tails")?

Why is the difficulty of the sharechain not linked directly to the main chain's difficulty?

Related to that is why not just keep 24 hours worth of main chain blocks?

"Heads" are shares without child shares (leaves of a tree structure). "Tails" are shares without their parent present (roots of a tree structure). The difficulty of the sharechain is unlinked so it can go as fast as possible, which we've empirically determined to be something like 20 to 30 seconds. Keeping 24 hours worth of main chain blocks would require storing an unbounded number of shares in memory, which is a bad idea.

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August 14, 2013, 03:22:14 AM
 #6430

Trying p2pool , running for 1 hour . I will add more devices if I can successfully configure my desktop to do so.

* Windows 7 Ultimate
* 8 Gigs of RAM
* Quadcore CPU
* What is wrong here ?
* What do I add to bitcoin conf file ?
* No incoming connections ?
* Only 6 peers ?

May I please request some feedback from forum members to help me.


Code:
cgminer version 2.11.0 - Started: [2013-08-14 11:26:24]
--------------------------------------------------------------------------------
 (5s):2.410G (avg):2.289Gh/s | Q:159  A:14  R:0  HW:15  E:9%  U:0.3/m
 ST: 2  SS: 0  DW: 298  NB: 47  LW: 3778  GF: 4  RF: 0  WU: 33.9
 Connected to 127.0.0.1 diff 96 with stratum as user Polyatomic/+96
 Block: 0014d6fba674e7c9...  Diff:50.8M  Started: [12:03:17]  Best share: 1.88K
--------------------------------------------------------------------------------
 [P]ool management [S]ettings [D]isplay options [Q]uit
 ICA 0:                | 364.2M/351.5Mh/s | A:2 R:0 HW:6 U:0.04/m
 ICA 1:                | 358.9M/346.4Mh/s | A:2 R:0 HW:0 U:0.04/m
 ICA 2:                | 419.1M/403.4Mh/s | A:0 R:0 HW:2 U:0.00/m
 ICA 3:                | 420.1M/403.6Mh/s | A:4 R:0 HW:1 U:0.08/m
 ICA 4:                | 402.6M/394.2Mh/s | A:3 R:0 HW:2 U:0.06/m
 ICA 5:                | 401.6M/390.4Mh/s | A:3 R:0 HW:4 U:0.06/m
--------------------------------------------------------------------------------

 [2013-08-14 12:11:08] Stratum from pool 0 requested work restart
 [2013-08-14 12:11:34] Stratum from pool 0 requested work restart
 [2013-08-14 12:11:45] Stratum from pool 0 requested work restart
 [2013-08-14 12:12:07] Stratum from pool 0 requested work restart
 [2013-08-14 12:12:53] Accepted 01444329 Diff 202/96 ICA 3
 [2013-08-14 12:12:56] Stratum from pool 0 requested work restart
 [2013-08-14 12:13:28] Stratum from pool 0 requested work restart
 [2013-08-14 12:13:54] Stratum from pool 0 requested work restart
 [2013-08-14 12:14:21] Stratum from pool 0 requested work restart
 [2013-08-14 12:14:45] Stratum from pool 0 requested work restart
 [2013-08-14 12:15:04] Stratum from pool 0 requested work restart
 [2013-08-14 12:15:40] Icarus 3 Re-estimate: Hs=2.371480e-009 W=8.729913e-003 re
ad_count=100 fullnonce=10.194s
 [2013-08-14 12:15:43] Stratum from pool 0 requested work restart
 [2013-08-14 12:15:49] Stratum from pool 0 requested work restart
 [2013-08-14 12:16:07] Stratum from pool 0 requested work restart
 [2013-08-14 12:16:46] Accepted 017e145f Diff 171/96 ICA 0
 [2013-08-14 12:16:59] Stratum from pool 0 requested work restart
 [2013-08-14 12:17:13] Stratum from pool 0 requested work restart
 [2013-08-14 12:17:17] Stratum from pool 0 requested work restart
 [2013-08-14 12:17:21] Stratum from pool 0 requested work restart

Try taking the /+96 off your miner's name
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August 14, 2013, 03:31:00 AM
 #6431

Trying p2pool , running for 1 hour . I will add more devices if I can successfully configure my desktop to do so.

* Windows 7 Ultimate
* 8 Gigs of RAM
* Quadcore CPU
* What is wrong here ?
* What do I add to bitcoin conf file ?
* No incoming connections ?
* Only 6 peers ?

May I please request some feedback from forum members to help me.


Code:
cgminer version 2.11.0 - Started: [2013-08-14 11:26:24]
--------------------------------------------------------------------------------
 (5s):2.410G (avg):2.289Gh/s | Q:159  A:14  R:0  HW:15  E:9%  U:0.3/m
 ST: 2  SS: 0  DW: 298  NB: 47  LW: 3778  GF: 4  RF: 0  WU: 33.9
 Connected to 127.0.0.1 diff 96 with stratum as user Polyatomic/+96
 Block: 0014d6fba674e7c9...  Diff:50.8M  Started: [12:03:17]  Best share: 1.88K
--------------------------------------------------------------------------------
 [P]ool management [S]ettings [D]isplay options [Q]uit
 ICA 0:                | 364.2M/351.5Mh/s | A:2 R:0 HW:6 U:0.04/m
 ICA 1:                | 358.9M/346.4Mh/s | A:2 R:0 HW:0 U:0.04/m
 ICA 2:                | 419.1M/403.4Mh/s | A:0 R:0 HW:2 U:0.00/m
 ICA 3:                | 420.1M/403.6Mh/s | A:4 R:0 HW:1 U:0.08/m
 ICA 4:                | 402.6M/394.2Mh/s | A:3 R:0 HW:2 U:0.06/m
 ICA 5:                | 401.6M/390.4Mh/s | A:3 R:0 HW:4 U:0.06/m
--------------------------------------------------------------------------------

 [2013-08-14 12:11:08] Stratum from pool 0 requested work restart
 [2013-08-14 12:11:34] Stratum from pool 0 requested work restart
 [2013-08-14 12:11:45] Stratum from pool 0 requested work restart
 [2013-08-14 12:12:07] Stratum from pool 0 requested work restart
 [2013-08-14 12:12:53] Accepted 01444329 Diff 202/96 ICA 3
 [2013-08-14 12:12:56] Stratum from pool 0 requested work restart
 [2013-08-14 12:13:28] Stratum from pool 0 requested work restart
 [2013-08-14 12:13:54] Stratum from pool 0 requested work restart
 [2013-08-14 12:14:21] Stratum from pool 0 requested work restart
 [2013-08-14 12:14:45] Stratum from pool 0 requested work restart
 [2013-08-14 12:15:04] Stratum from pool 0 requested work restart
 [2013-08-14 12:15:40] Icarus 3 Re-estimate: Hs=2.371480e-009 W=8.729913e-003 re
ad_count=100 fullnonce=10.194s
 [2013-08-14 12:15:43] Stratum from pool 0 requested work restart
 [2013-08-14 12:15:49] Stratum from pool 0 requested work restart
 [2013-08-14 12:16:07] Stratum from pool 0 requested work restart
 [2013-08-14 12:16:46] Accepted 017e145f Diff 171/96 ICA 0
 [2013-08-14 12:16:59] Stratum from pool 0 requested work restart
 [2013-08-14 12:17:13] Stratum from pool 0 requested work restart
 [2013-08-14 12:17:17] Stratum from pool 0 requested work restart
 [2013-08-14 12:17:21] Stratum from pool 0 requested work restart

Try taking the /+96 off your miner's name
change the 96 to 4

1Yxx3GinTkNHtodDpSKioBBsTYdW9zZAK
kano
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August 14, 2013, 07:10:13 AM
 #6432

Except, +96 wont make any difference to the shares found - just the fake shares found that don't count for anything.
(and +96 vs +4 will reduce the network usage by not bothering to send 24 times as many useless shares Tongue)
So that change will be just window dressing

Pool: https://kano.is BTC: 1KanoiBupPiZfkwqB7rfLXAzPnoTshAVmb
CKPool and CGMiner developer, IRC FreeNode #ckpool and #cgminer kanoi
Help keep Bitcoin secure by mining on pools with Stratum, the best protocol to mine Bitcoins with ASIC hardware
HellDiverUK
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August 14, 2013, 07:58:17 AM
 #6433

I keep getting this spamming my p2pool node's terminal window.  Happens every 3-5 seconds:

Code:
2013-08-14 08:55:53.386000 >   File "p2pool\util\deferred_resource.pyc", line 24
, in render
2013-08-14 08:55:53.387000 >
2013-08-14 08:55:53.388000 >   File "twisted\internet\defer.pyc", line 134, in m
aybeDeferred
2013-08-14 08:55:53.389000 >
2013-08-14 08:55:53.390000 >   File "twisted\web\resource.pyc", line 216, in ren
der
2013-08-14 08:55:53.391000 >
2013-08-14 08:55:53.392000 >   File "twisted\internet\defer.pyc", line 1187, in
unwindGenerator
2013-08-14 08:55:53.393000 >
2013-08-14 08:55:53.393000 > --- <exception caught here> ---
2013-08-14 08:55:53.393000 >   File "twisted\internet\defer.pyc", line 1045, in
_inlineCallbacks
2013-08-14 08:55:53.394000 >
2013-08-14 08:55:53.395000 >   File "p2pool\web.pyc", line 186, in render_GET
2013-08-14 08:55:53.395000 >
2013-08-14 08:55:53.395000 >   File "p2pool\web.pyc", line 446, in <lambda>
2013-08-14 08:55:53.396000 >
2013-08-14 08:55:53.396000 > exceptions.KeyError: 'last_'


Everything seems to work OK, but I don't know what this error means.  Only started yesterday.
kano
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August 14, 2013, 08:03:52 AM
 #6434

Try a version of cgminer from this decade, too. 
He can't, he has Cairnsmore1's and I've not got one to make a proper USB driver for them ... though he probably could update to 3.1.1 Smiley

I wrote the necessary Cairnsmore1 code for the Icarus driver before, that he is using (for no real reason actually and Yohan never gave a damn about that either) but to do it in USB will require the hardware.
They've used an 8 endpoint chip (unlike any other device has used) so I'd need the hardware to get the code right and do a new type of driver for that.

Also, supporting it is a right PITA when I don't have the hardware myself coz I can't ever see if I've managed to screw it up every time I make a related change elsewhere.

At the moment, ckolivas has an Avalon, and I have a BitBurner, so that means we have to get the other to test related changes each time.
Not a big deal, but at least we have incentive (having each our selves) and it's easy to get the other to test changes that we do for our own hardware.

... and I'm not really all that interested in spending all the time necessary to do that with no reason at all for me to do it either.

We've had this problem twice already with the ztex, nelisky dropped doing support and it fell by the wayside, then dennisx took it over.
However he's not been around at all recently when people have asked about possible problems, enhancements or help with it.

Pool: https://kano.is BTC: 1KanoiBupPiZfkwqB7rfLXAzPnoTshAVmb
CKPool and CGMiner developer, IRC FreeNode #ckpool and #cgminer kanoi
Help keep Bitcoin secure by mining on pools with Stratum, the best protocol to mine Bitcoins with ASIC hardware
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August 14, 2013, 08:27:09 AM
 #6435

Got to love the bleeding edge that is bitcoin mining.   Wink
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August 14, 2013, 10:27:27 AM
 #6436

From the wiki:
Quote
Unlike Bitcoin, nodes do not know the entire chain - instead they only hold the last 8640 shares (the last day's worth). In order to prevent an attacker from working on a chain in secret and then releasing it, overriding the existing chain, chains are judged by how much work they have since a point in the past. To ascertain that the work has been done since that point, nodes look at the Bitcoin blocks that the shares reference, establishing a provable timestamp. (If a share points to a block, it was definitely made after that block was made.)

What is the "point in the past"?

When the pool finds a block, it adds a marker into the bitcoin chain?

Quote
Yes, you're mining on the assumption that the pool is not going to disappear while your shares are valid. I'm not sure exactly what you mean with the second question, but the sharechain is persisted to disk, so when you restart your node, it only has to download shares since it was stopped.

I was thinking about what would happen if you mined on the wrong chain.  

Does the pool immediately mine on the sharechain or wait until a few bitcoin blocks have passed?

In fact, what makes a head/tail "verified"?

1LxbG5cKXzTwZg9mjL3gaRE835uNQEteWF
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August 14, 2013, 08:01:03 PM
 #6437

I love P2Pool and having been running it for a while but I have a pretty marginal rig at around 700MH/s and with the latest hike in difficulty I'm just not getting any shares any more. I'm sure I will at some point but knowing my luck that will happen with P2Pool to fails to find a block and so all that hashing effort will be wasted.

Is it possible to lower the share difficulty so smaller miners are still getting regular shares albeit smaller ones ? I'm assuming that would be a fundamental change to the P2Pool source that will be incompatible with other P2Pool nodes out there ? If so, would it be possible to create a fork, say EasierP2Pool and recruit enough participants ?

Thanks

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August 14, 2013, 09:35:38 PM
 #6438

I love P2Pool and having been running it for a while but I have a pretty marginal rig at around 700MH/s and with the latest hike in difficulty I'm just not getting any shares any more. I'm sure I will at some point but knowing my luck that will happen with P2Pool to fails to find a block and so all that hashing effort will be wasted.

Is it possible to lower the share difficulty so smaller miners are still getting regular shares albeit smaller ones ? I'm assuming that would be a fundamental change to the P2Pool source that will be incompatible with other P2Pool nodes out there ? If so, would it be possible to create a fork, say EasierP2Pool and recruit enough participants ?

Thanks

At 700MH/s, your best bet is to retire or go to another pool like BTC Guild.  I'm at about 7.5GH/s and my estimated time to share is 2.9 hours.  You're looking at around 31 hours per share, and with variance, there will be days when you don't get a share at all.

M

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centove
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August 14, 2013, 11:17:57 PM
 #6439

I keep getting this spamming my p2pool node's terminal window.  Happens every 3-5 seconds:

Code:
2013-08-14 08:55:53.386000 >   File "p2pool\util\deferred_resource.pyc", line 24
, in render
2013-08-14 08:55:53.387000 >
2013-08-14 08:55:53.388000 >   File "twisted\internet\defer.pyc", line 134, in m
aybeDeferred
2013-08-14 08:55:53.389000 >
2013-08-14 08:55:53.390000 >   File "twisted\web\resource.pyc", line 216, in ren
der
2013-08-14 08:55:53.391000 >
2013-08-14 08:55:53.392000 >   File "twisted\internet\defer.pyc", line 1187, in
unwindGenerator
2013-08-14 08:55:53.393000 >
2013-08-14 08:55:53.393000 > --- <exception caught here> ---
2013-08-14 08:55:53.393000 >   File "twisted\internet\defer.pyc", line 1045, in
_inlineCallbacks
2013-08-14 08:55:53.394000 >
2013-08-14 08:55:53.395000 >   File "p2pool\web.pyc", line 186, in render_GET
2013-08-14 08:55:53.395000 >
2013-08-14 08:55:53.395000 >   File "p2pool\web.pyc", line 446, in <lambda>
2013-08-14 08:55:53.396000 >
2013-08-14 08:55:53.396000 > exceptions.KeyError: 'last_'


Everything seems to work OK, but I don't know what this error means.  Only started yesterday.

Are you getting shares or lots of rejects (in the miner software) I switched to cgminer 3.3.3 and started seeing these and every thing was being rejected. Switched back to cgminer 3.3.1 and all was well again.

Give me Btc: 1BRkf5bwSVdGCyvu4SyYBiJjEjbNiAQoYd Mine on my node: http://ask.gxsnmp.org:9332/
rav3n_pl
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August 14, 2013, 11:27:40 PM
 #6440

333 is bugged, use 332 or 334 Smiley

1Rav3nkMayCijuhzcYemMiPYsvcaiwHni  Bitcoin stuff on my OneDrive
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