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Author Topic: [1500 TH] p2pool: Decentralized, DoS-resistant, Hop-Proof pool  (Read 2028617 times)
baloo_kiev
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June 28, 2013, 08:21:39 PM
 #5921

When was the last time that P2Pool found a block? Sad

http://p2pool.info/ - all blocks + luck charts

PGP: 6EC48BA7
Welcome to my p2pool: BTC
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baloo_kiev
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June 28, 2013, 08:27:13 PM
 #5922

Could someone who has AM blades grab one and mine on 78.27.191.182, ports 8353 and 8354, for about 5 minutes on each please.

First one is p2pool node worker port, second is getwork port of stratum mining proxy, which itself is directed to the same node.
I am trying to debug with some tweaks.

Thanks!

PGP: 6EC48BA7
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baloo_kiev
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June 28, 2013, 08:42:37 PM
 #5923

I can understand that shares decrease in value as the total number of shares in the block increases (hence the overall downward sloping of the flat regions). But what explains the jumps up and down? I only have one orphan, and 9 valid shares in this block... (two found during the time plotted there).

Payout system in the pool is PPLNS, which stands for pay per last N shares. Jumps down occur when one of your shares becomes so old that it is excluded from those "last N shares". Thus, not every share is actually paid. However, this works both ways! When a block is found, your payout will not drop to zero but remain the same, so you may eventually get paid several times (from several blocks) for the same share!

PGP: 6EC48BA7
Welcome to my p2pool: BTC
Boing7898
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June 28, 2013, 08:43:20 PM
 #5924



Is it normal for a node with 2GH/s?

Ohai.
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June 28, 2013, 08:48:13 PM
 #5925

Is it normal for a node with 2GH/s?
No. You just step on memory leak. Git pull and restart node.

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Boing7898
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June 28, 2013, 08:55:44 PM
 #5926

Is it normal for a node with 2GH/s?
No. You just step on memory leak. Git pull and restart node.
Updated and restarted, looks better now: 300 MB of memory used.
Does it increases with the hashrate or not?

Ohai.
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yxxyun
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June 30, 2013, 08:10:25 AM
 #5927

wow, the hashrate now is over 900Gh/s!

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Subo1977
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June 30, 2013, 08:31:15 AM
 #5928

wow, the hashrate now is over 900Gh/s!

witout increase of DOA....

Whre comes it from 

I provide a 1000Mbit+ Torrent-Seedbox in FR and a 500Mbit Box in NL for orginal Blockchain Bootstrap.dat download. and also for Armoryclient Torrent

Tips are welcome:  15MuGdPSXU62fEFE9XbBZN3UvJMHBDVBoy
centove
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June 30, 2013, 11:55:38 AM
 #5929

wow, the hashrate now is over 900Gh/s!

witout increase of DOA....

Whre comes it from 

Probably some more ASIC's coming on line.. Difficulty is up though.. Though it looks like that may be slowing down as well. Luck on BTCGuild - Average luck this difficulty is 75.73%. So block generation has slowed.

Give me Btc: 1BRkf5bwSVdGCyvu4SyYBiJjEjbNiAQoYd Mine on my node: http://ask.gxsnmp.org:9332/
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June 30, 2013, 12:38:16 PM
 #5930

Can't wait for update to rejoin with baj

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maqifrnswa
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June 30, 2013, 01:31:14 PM
 #5931

wow, the hashrate now is over 900Gh/s!

witout increase of DOA....

Whre comes it from 

BFL SCs?

@Kano: Did you ever retry p2pool after flashing your jally to firmware 1.2.5? There may be something in there that is enabling the reports that recently shipped BFL devices work on p2pool. Mine shipped, so next week I can try to do some real tests - play with different firmware revisions to try to confirm the problem and fix.
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June 30, 2013, 02:15:04 PM
 #5932

1NastyFRkeUTmMdbMmzggDVTQA6r3ibUoX  this guy has over 200Gh/s on p2pool Huh

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xgtele
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June 30, 2013, 03:24:17 PM
 #5933

1NastyFRkeUTmMdbMmzggDVTQA6r3ibUoX  this guy has over 200Gh/s on p2pool Huh

Yeah, nasty things are coming  Cool

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June 30, 2013, 03:34:04 PM
 #5934

1NastyFRkeUTmMdbMmzggDVTQA6r3ibUoX  this guy has over 200Gh/s on p2pool Huh

Yeah, nasty things are coming  Cool

yeah, nasty  Wink
https://bitcointalk.org/index.php?topic=86854.0

5x BFL 60GH/s ASIC Miner
5x BFL BitForce Single FPGA
1x ASICminer USB Block Erupter
baloo_kiev
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June 30, 2013, 08:37:28 PM
 #5935

Brief report of p2pool + AM block eruptor blade investigation

1) Blade always works on difficulty 1, regardless of what server tells, so p2pool must always provide diff 1 pseudoshares to account solved work properly. This does not affect real shares difficulty, which can be tuned as usually.

2) Blade does not use long polling. Instead, it makes about 4 getwork requests per second. Looks like it makes as much requests as it can, each providing work to one chip. With 32 chips, it means about 8 seconds per full round. Maybe it doesn't send solutions before doing this full round; this must rersult in about 50% DOA. Or maybe results are put into queue and wait while software is busy requesting new work. In both cases, running it locally may help. Also, I'm not sure that real share DOA will be as high as pseudoshare DOA.

3) "p2pool + stratum proxy + AM blade" setup has some authorization-related issue. This is all I can tell by now, will try to get more details.

P.S. With the difficulty tweak, it works giving about 50% pseudoshare DOA. Real share efficiency is unknown because of little statistics. Those who have AM blades may give it a try at 78.27.191.182:8353 (with your payout address as username).

P.P.S. A question to any developers here. May I officially state that AM blade software is a piece of crap? No stratum, no long polling and constant difficulty in the year 2013. It might be OK for their internal mining but not for a sold product!

PGP: 6EC48BA7
Welcome to my p2pool: BTC
lenny_
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June 30, 2013, 10:32:13 PM
 #5936

Thank you very much forrestv and baloo_kiev for your efforts and development. I hope that these Blades will be finally working fine with p2pool soon. Smiley
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June 30, 2013, 11:32:54 PM
 #5937

P.P.S. A question to any developers here. May I officially state that AM blade software is a piece of crap? No stratum, no long polling and constant difficulty in the year 2013. It might be OK for their internal mining but not for a sold product!
Yes you may say that and you won't get any argument from developers (we weren't remotely involved, engaged or asked).

Primary developer/maintainer for cgminer and ckpool/ckproxy.
Pooled mine at kano.is, solo mine at solo.ckpool.org
-ck
baloo_kiev
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July 01, 2013, 01:35:28 AM
 #5938

Brief report of p2pool + AM block eruptor blade investigation

1) Blade always works on difficulty 1, regardless of what server tells, so p2pool must always provide diff 1 pseudoshares to account solved work properly. This does not affect real shares difficulty, which can be tuned as usually.

2) Blade does not use long polling. Instead, it makes about 4 getwork requests per second. Looks like it makes as much requests as it can, each providing work to one chip. With 32 chips, it means about 8 seconds per full round. Maybe it doesn't send solutions before doing this full round; this must rersult in about 50% DOA. Or maybe results are put into queue and wait while software is busy requesting new work. In both cases, running it locally may help. Also, I'm not sure that real share DOA will be as high as pseudoshare DOA.

3) "p2pool + stratum proxy + AM blade" setup has some authorization-related issue. This is all I can tell by now, will try to get more details.

P.S. With the difficulty tweak, it works giving about 50% pseudoshare DOA. Real share efficiency is unknown because of little statistics. Those who have AM blades may give it a try at 78.27.191.182:8353 (with your payout address as username).

P.P.S. A question to any developers here. May I officially state that AM blade software is a piece of crap? No stratum, no long polling and constant difficulty in the year 2013. It might be OK for their internal mining but not for a sold product!

Update!
At last, the blade's mining mechanism is clear to me. Like in AM USB, found solutions are reported immediately. However, unlike AM USB and like BFL devices, work is not restarted. This means that a chip keeps mining the same work for about 12 seconds (I guess it corresponds to full nonce range of 32 bit, and is equal to average chip's time per one diff1 share). Since solutions are reported immediately, this must give slightly less than 50% DOA shares.

There's a solution that can considerably increase mining efficiency on p2pool for ASIC devices, and this solution is... share difficulty. By setting it high you not only help small miners, but also protect yourself from orphan shares! If you are mining with x10 share difficulty, your "DOA" shares will most probably get into the chain, since your share's work is bigger than even 9 min diff shares. With current mindiff of 1500 and expected time to block of 30 hours, ASIC miners (except AM USB which works fine) can set their diff to 15000 without any serious increase of variance. Shares which are first reported DOA in p2pool node log may still get into the chain!

PGP: 6EC48BA7
Welcome to my p2pool: BTC
forrestv
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July 01, 2013, 01:40:26 AM
 #5939

There's a solution that can considerably increase mining efficiency on p2pool for ASIC devices, and this solution is... share difficulty. Setting it high you not only help small miners, but also protect yourself from orphan shares! If you are mining with x10 share difficulty, your "DOA" shares will most probably get into the chain, since your share's work is bigger than even 9 min diff shares. With current mindiff of 1500 and expected time to block of 30 hours, ASIC miners (except AM USB which works fine) can set their diff to 15000 without any serious increase of variance!

This actually doesn't do anything (thankfully). P2Pool uses the work of a share's 5th parent when sorting sharechain tips, which prevents attacks that would allow you to effectively orphan the tip share on command.

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July 01, 2013, 03:00:12 AM
 #5940

Why would they fix this only in the usb version?

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