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Author Topic: [1500 TH] p2pool: Decentralized, DoS-resistant, Hop-Proof pool  (Read 2033441 times)
astutiumRob
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September 27, 2013, 02:45:32 AM
 #6661

I see higher amount of rejects on p2pool with BFL devices using cgminer compared to other pools. Is that normal? or am I missing some configuration?
Change your difficulty - nearest power of 2 of 30% of your hashrate
(so +8 for a LS, +16 for a Single)

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forrestv
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September 27, 2013, 03:01:30 AM
 #6662

Your BFLs will run great on p2pool, or you could just use p2pool as a backup for them.

I see higher amount of rejects on p2pool with BFL devices using cgminer compared to other pools. Is that normal? or am I missing some configuration?

A bit higher than other pools is normal. Non-rejects are worth slightly more on P2Pool to compensate. What reject rate are you getting? The average for the entire P2Pool is 7%, so if you're close to that you're not losing anything. If you're lower you're actually making more than expected.

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yurtesen
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September 27, 2013, 04:36:30 AM
 #6663

Your BFLs will run great on p2pool, or you could just use p2pool as a backup for them.

I see higher amount of rejects on p2pool with BFL devices using cgminer compared to other pools. Is that normal? or am I missing some configuration?

A bit higher than other pools is normal. Non-rejects are worth slightly more on P2Pool to compensate. What reject rate are you getting? The average for the entire P2Pool is 7%, so if you're close to that you're not losing anything. If you're lower you're actually making more than expected.

I see about 5.1% to 5.5% now. How is it that I am making more compared to a pool with 1% fee but very low rejects? Because on a normal pool I get 0.3% rejects only? Wouldnt that mean I would make 4% more on a normal pool?
daemondazz
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September 27, 2013, 06:14:14 AM
 #6664

I see about 5.1% to 5.5% now. How is it that I am making more compared to a pool with 1% fee but very low rejects? Because on a normal pool I get 0.3% rejects only? Wouldnt that mean I would make 4% more on a normal pool?

With p2pool the absolute number doesn't matter, only in comparison to the pool average value. This is because rejected shares could still solve a bitcoin block. When you are mining on p2pool you are essentially working on two "block" chains, the bitcoin one and the p2pool sharechain. A share can be valid for bitcoin but not necessarily for p2pool.

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paulkoan
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September 27, 2013, 09:19:46 AM
 #6665

Change your difficulty - nearest power of 2 of 30% of your hashrate
(so +8 for a LS, +16 for a Single)

Where is this set?  It doesn't seem to be an option in p2pool or bitcoin.  And what is the formula?  A Single is 60GH/s so 30% of that is 9, two to the power 9 is 512.


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IYFTech
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September 27, 2013, 11:19:46 AM
 #6666

Anybody else seeing this since the latest git pull?



Running p2p Version: 13.3-27-g740e306 on Xubuntu 12.04 64bit.

Normally runs at a constant 350ish - now it's gone superman.....up, up & away  Shocked

-- Smiley  Thank you for smoking  Smiley --  If you paid VAT to dogie for items you should read this thread:  https://bitcointalk.org/index.php?topic=1018906.0
forrestv
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September 27, 2013, 11:48:03 AM
 #6667

Your BFLs will run great on p2pool, or you could just use p2pool as a backup for them.

I see higher amount of rejects on p2pool with BFL devices using cgminer compared to other pools. Is that normal? or am I missing some configuration?

A bit higher than other pools is normal. Non-rejects are worth slightly more on P2Pool to compensate. What reject rate are you getting? The average for the entire P2Pool is 7%, so if you're close to that you're not losing anything. If you're lower you're actually making more than expected.

I see about 5.1% to 5.5% now. How is it that I am making more compared to a pool with 1% fee but very low rejects? Because on a normal pool I get 0.3% rejects only? Wouldnt that mean I would make 4% more on a normal pool?

Like I said, valid shares are worth slightly more to compensate for rejects.

The "Efficiency" number tells you how much you're making compared to a perfect pool. Mine for a while and then look at it and its confidence interval.

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spiccioli
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September 27, 2013, 12:11:03 PM
 #6668

forrestv,

do you know why slush's stratum mining proxy does not work with p2pool?

Even latest from git, I did try to mine on p2pool using a bitfury unit, which uses slush's proxy, but it does not mine.

I see the "New work for worker" message on p2pool's log, but shush's proxy keeps spitting gibberish like this

Code:
2013-09-27 13:58:34,304 INFO proxy client_service.handle_event # New job 129318733731692154145825694244099019491 for prevhash 298cfff3, clean_jobs=True
2013-09-27 13:58:34,305 INFO proxy getwork_listener._on_lp_broadcast # LP broadcast for worker 'test+64'
2013-09-27 13:58:34,310 DEBUG protocol protocol.writeJsonResponse # < {"error": null, "id": 442419734, "result": null}
2013-09-27 13:58:34,314 DEBUG protocol protocol.writeJsonRequest # < {"params": ["test+64", "test"], "id": 406, "method": "mining.authorize"}
2013-09-27 13:58:34,315 INFO proxy getwork_listener.render_GET # Worker 'test+64' subscribed for LP at /lp
2013-09-27 13:58:34,317 DEBUG protocol protocol.lineReceived # > {u'result': None, u'jsonrpc': u'2.0', u'id': 406, u'error': None}
2013-09-27 13:58:34,318 DEBUG protocol protocol.lineReceived # > {u'jsonrpc': u'2.0', u'params': [64.0], u'method': u'mining.set_difficulty', u'id': 957105313}
2013-09-27 13:58:34,318 INFO proxy client_service.handle_event # Setting new difficulty: 64.0
2013-09-27 13:58:34,318 DEBUG protocol protocol.writeJsonResponse # < {"error": null, "id": 957105313, "result": null}
2013-09-27 13:58:34,319 DEBUG protocol protocol.lineReceived # > {u'jsonrpc': u'2.0', u'params': [u'179297550287140125011901284012613621922', u'298cfff33b58187bfe2f448b7dac58168c01189bccb10c770000000300000000', 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u'00000000', [u'4d7d18903e3184303ab0c31689e072337b3ef6d740619cbc7ee702873fec78bc', u'5ea64d4c21a29a345bf7a3e7ce39c6fd135ec4b2de1a6e816691d77748c1c8e7', u'c506542b281b25222cee2f474a7cecb10b1f3e63d8d8f343b4213790092b0ad5', u'e386dd17c46dd75bd414309f80070c54a6441d882ef3a57c90b6455f026bda41', u'9fe09964b5e238392be984fb16486199feecc6dad83fa4d7f51298c00c60c05d', u'cf8bed3b243fa9051f0d382844bc04a50a2d4b61692a1dd13c2d449aa63ae18d', u'eee288a735858cea0b5e47460df70702545aa87a03c97e101709801deaf0e2fa', u'28d79e384d40d8c1bc4193136c8ad997802ee819ca6561f616d8ad73f3b0b713', u'7db4af446462aa35b47982e94b4cc698fb6501eb90d0d3702178a4ada87be64c'], u'00000002', u'191cdc20', u'524572e2', True], u'method': u'mining.notify', u'id': 16074717}
2013-09-27 13:58:34,320 INFO proxy client_service.handle_event # New job 179297550287140125011901284012613621922 for prevhash 298cfff3, clean_jobs=True
2013-09-27 13:58:34,321 INFO proxy getwork_listener._on_lp_broadcast # LP broadcast for worker 'test+64'
2013-09-27 13:58:34,325 DEBUG protocol protocol.writeJsonResponse # < {"error": null, "id": 16074717, "result": null}
2013-09-27 13:58:34,329 DEBUG protocol protocol.writeJsonRequest # < {"params": ["test+64", "test"], "id": 407, "method": "mining.authorize"}
2013-09-27 13:58:34,330 INFO proxy getwork_listener.render_GET # Worker 'test+64' subscribed for LP at /lp
2013-09-27 13:58:34,332 DEBUG protocol protocol.lineReceived # > {u'result': None, u'jsonrpc': u'2.0', u'id': 407, u'error': None}
2013-09-27 13:58:34,333 DEBUG protocol protocol.lineReceived # > {u'jsonrpc': u'2.0', u'params': [64.0], u'method': u'mining.set_difficulty', u'id': 609686475}
2013-09-27 13:58:34,334 INFO proxy client_service.handle_event # Setting new difficulty: 64.0
^C2013-09-27 13:58:34,334 DEBUG protocol protocol.writeJsonResponse # < {"error": null, "id": 609686475, "result": null}
2013-09-27 13:58:34,335 INFO proxy mining_proxy.on_shutdown # Shutting down proxy...
2013-09-27 13:58:34,336 INFO proxy mining_proxy.on_disconnect # Disconnected from Stratum pool at .......:9332
2013-09-27 13:58:34,337 INFO stats stats.print_stats # 0 peers connected, state changed 1 times

The log here was created using ufasoft bitcoin-miner which seems to have the same problem when connected to p2pool using the stratum proxy because I'm not able right now to retest the bitfury's unit.

Any idea?

spiccioli
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September 27, 2013, 01:21:19 PM
 #6669

Try https://github.com/forrestv/stratum/tree/maxlengthfix

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September 27, 2013, 02:59:26 PM
 #6670


No difference, I even increased MAX_LENGTH to 8Mb more or less

Code:
013-09-27 14:46:38,070 INFO proxy client_service.handle_event # New job 34994353376094061241536474908834835780 for prevhash 4b820075, clean_jobs=True
2013-09-27 14:46:38,400 INFO proxy client_service.handle_event # Setting new difficulty: 48.062596497
2013-09-27 14:46:38,693 INFO proxy client_service.handle_event # New job 285701906439778128344577293448536521316 for prevhash 4b820075, clean_jobs=True
2013-09-27 14:46:39,022 INFO proxy client_service.handle_event # Setting new difficulty: 48.062596497
2013-09-27 14:46:39,316 INFO proxy client_service.handle_event # New job 150053800563661665987158017586485075904 for prevhash 4b820075, clean_jobs=True
2013-09-27 14:46:39,916 INFO proxy client_service.handle_event # Setting new difficulty: 46.6031855997
2013-09-27 14:46:40,217 INFO proxy client_service.handle_event # New job 143798284483278434977368641514806560471 for prevhash 4b820075, clean_jobs=True
2013-09-27 14:46:40,417 INFO proxy client_service.handle_event # Setting new difficulty: 46.6031855997
2013-09-27 14:46:40,768 INFO proxy client_service.handle_event # New job 186365317384528894265181723368453710583 for prevhash 4b820075, clean_jobs=True
2013-09-27 14:46:40,911 INFO proxy client_service.handle_event # Setting new difficulty: 46.6031855997
2013-09-27 14:46:41,204 INFO proxy client_service.handle_event # New job 255424085435345721878011713647552276082 for prevhash 4b820075, clean_jobs=True
2013-09-27 14:46:41,532 INFO proxy client_service.handle_event # Setting new difficulty: 46.6031855997
2013-09-27 14:46:41,826 INFO proxy client_service.handle_event # New job 205252725933772297880035452289960841088 for prevhash 4b820075, clean_jobs=True
2013-09-27 14:46:42,155 INFO proxy client_service.handle_event # Setting new difficulty: 46.6031855997
2013-09-27 14:46:42,449 INFO proxy client_service.handle_event # New job 2696826970669673437006


this is it when mining on HHTT

Code:
2013-09-27 14:49:37,797 INFO proxy getwork_listener._on_authorized # Worker '1...' asks for new work
2013-09-27 14:49:37,925 INFO proxy getwork_listener._on_authorized # Worker '1...' asks for new work
2013-09-27 14:49:38,025 INFO proxy jobs.submit # Submitting bfc2ccb5
2013-09-27 14:49:37,797 INFO proxy getwork_listener._on_authorized # Worker '1...' asks for new work
2013-09-27 14:49:37,925 INFO proxy getwork_listener._on_authorized # Worker '1...' asks for new work
2013-09-27 14:49:38,250 WARNING proxy getwork_listener._on_submit # [219ms] Share from '1..xX' accepted, diff 128
2013-09-27 14:49:38,279 INFO proxy jobs.submit # Submitting f0be461a
2013-09-27 14:49:37,797 INFO proxy getwork_listener._on_authorized # Worker '1...' asks for new work
2013-09-27 14:49:37,925 INFO proxy getwork_listener._on_authorized # Worker '1...' asks for new work

I even fiddled a little with -rt and --old-target options of slush's proxy but they make no difference.

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September 28, 2013, 12:56:00 AM
 #6671

Change your difficulty - nearest power of 2 of 30% of your hashrate
(so +8 for a LS, +16 for a Single)
Where is this set?
There'a lot of really useful information in the p2pool documentation ...

Quote
It doesn't seem to be an option in p2pool or bitcoin
In your mining software by appending +(n) onto the worker name (address)

Quote
And what is the formula?
The one you quoted Wink

Quote
A Single is 60GH/s so 30% of that is 9
30% of 60 is not 9 for a start - and the numbers for a single and a little-single :p

30% of 60 is 18, nearest 'power of 2' to 18 is 16, so you use 16


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September 28, 2013, 11:54:29 AM
 #6672

I see higher amount of rejects on p2pool with BFL devices using cgminer compared to other pools. Is that normal? or am I missing some configuration?
Change your difficulty - nearest power of 2 of 30% of your hashrate
(so +8 for a LS, +16 for a Single)

So if I have 3 singles running with cgminer, I should set it to 3x16=48 or 16 only?
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September 28, 2013, 01:33:42 PM
 #6673

Total power per miner not per device.

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September 28, 2013, 02:04:20 PM
 #6674

Where is this set?
There'a lot of really useful information in the p2pool documentation ...

My brain simply isn't working right.  I have looked at the documentation in the github download, and at the wiki, and cannot find this.  I know I have read it before, so I must have found it previously.  Could you drop me a link to the right doc?
Quote
30% of 60 is not 9 for a start - and the numbers for a single and a little-single :p

Ahem.  See my first point.

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September 28, 2013, 05:20:14 PM
 #6675

I see higher amount of rejects on p2pool with BFL devices using cgminer compared to other pools. Is that normal? or am I missing some configuration?
Change your difficulty - nearest power of 2 of 30% of your hashrate
(so +8 for a LS, +16 for a Single)

So if I have 3 singles running with cgminer, I should set it to 3x16=48 or 16 only?

3 * 60 * .3 == 54
Powers of 2: 1, 2, 4, 8, 16, 32, 64...

64 would probably be a good idea, but you'd get slightly less variance with 32.  Then again, since you don't get a share until around 50,000, there's no point in setting the local difficulty lower than you have to, unless you want the most accurate statistics possible... but then you can just use your mining software to see what your singles are actually doing.

Short answer: 64

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September 28, 2013, 05:27:56 PM
 #6676

3 * 60 * .3 == 54
Powers of 2: 1, 2, 4, 8, 16, 32, 64...

64 would probably be a good idea, but you'd get slightly less variance with 32.  Then again, since you don't get a share until around 50,000, there's no point in setting the local difficulty lower than you have to, unless you want the most accurate statistics possible... but then you can just use your mining software to see what your singles are actually doing.

Short answer: 64
180 / 1.4 = 128 (almost exactly)

There's no point in using a lower difficulty with p2pool. You're just wasting your own CPU cycles.

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September 28, 2013, 05:48:36 PM
 #6677

180 / 1.4 = 128 (almost exactly)

There's no point in using a lower difficulty with p2pool. You're just wasting your own CPU cycles.

That's about 71% of 180, not 30% of 180.

If you want to get technical, the best difficulty is 32,768 regardless of your local hashrate, because unless about a third of the users dropped out of the network, the difficulty per P2Pool share won't drop that low.  Every share found below the current P2Pool difficulty is useful only for local statistics.  Unless you're implementing a sub-pool that has a different share tracking method, those shares are wasted.

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September 28, 2013, 06:26:40 PM
 #6678

180 / 1.4 = 128 (almost exactly)

There's no point in using a lower difficulty with p2pool. You're just wasting your own CPU cycles.

That's about 71% of 180, not 30% of 180.

If you want to get technical, the best difficulty is 32,768 regardless of your local hashrate, because unless about a third of the users dropped out of the network, the difficulty per P2Pool share won't drop that low.  Every share found below the current P2Pool difficulty is useful only for local statistics.  Unless you're implementing a sub-pool that has a different share tracking method, those shares are wasted.

And every hash you produce before you find a share is wasted? This is the basis of "proof of work", isn't it?


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September 28, 2013, 06:34:17 PM
 #6679

I have a problem I don't really understand, and I'm hoping one of you can give me some useful advice...

I was running a P2Pool node for a while, and I seem to remember that my Bitcoind GetBlockTemplate Latency from the graphs page was consistently ~0.2s.

I started mining on a different pool for a couple of weeks, then came back to P2Pool - and now, my Bitcoind GetBlockTemplate Latency is staying up at ~1.1s!  That seems pretty high to me, especially since bitcoind and P2Pool are running on the same machine.

As far as I can tell, the only thing that's different is that I am using 13.3 now, and was using 13.2 before.  I have not tried reverting to 13.2...  Maybe that's an experiment I should try, but I didn't see any change in the release notes that should affect this.

If it makes any difference, the platform is Win7 64-bit.

Anyone have any idea what might be going on here?

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September 28, 2013, 06:46:20 PM
 #6680

180 / 1.4 = 128 (almost exactly)

There's no point in using a lower difficulty with p2pool. You're just wasting your own CPU cycles.

That's about 71% of 180, not 30% of 180.

If you want to get technical, the best difficulty is 32,768 regardless of your local hashrate, because unless about a third of the users dropped out of the network, the difficulty per P2Pool share won't drop that low.  Every share found below the current P2Pool difficulty is useful only for local statistics.  Unless you're implementing a sub-pool that has a different share tracking method, those shares are wasted.
I don't know where you're getting the random 30% number, but the formula I posted is the tried and proven method for keeping your shares per minute at the sweet spot between accurate stat tracking and bandwidth/CPU savings.

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