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Author Topic: [1500 TH] p2pool: Decentralized, DoS-resistant, Hop-Proof pool  (Read 2028728 times)
mdude77
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July 25, 2012, 12:09:52 AM
 #3021

Shame I can't use my BFL single (or has anyone got a solution for the 5sec issue?)!
5sec issue?

-- Smoov


BFL FPGA singles search all 4b nounces before returning control to the miner with a list of 1 difficulty shares it has found. This takes about 5 seconds. In this 5 seconds when mining on a "normal" pool the chance of a block being created is very small so you get very few stales.

On p2pool there is a new share every 10 seconds. So with BFL FPGA single you get about 50% stales. BFL need to fix this issue.

Increasing difficulty doesn't fix it?

M

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kwukduck
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July 25, 2012, 12:16:10 AM
 #3022

i've been mining with p2pool for a while now and today i thought of counting what i had mined, the average of the last month is about 0.17 btc/day, i compared this to what i should get at my speed (625MHash) which is about 0.34 btc/day. I haven't used a regular pool for a while now so i can't really say if that would be any better.
I knew p2pool had slightly lower rewards then regular pools but i didn't expect to lose 50%...
Is there something wrong with my config or is this normal?

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mdude77
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July 25, 2012, 12:26:15 AM
 #3023

i've been mining with p2pool for a while now and today i thought of counting what i had mined, the average of the last month is about 0.17 btc/day, i compared this to what i should get at my speed (625MHash) which is about 0.34 btc/day. I haven't used a regular pool for a while now so i can't really say if that would be any better.
I knew p2pool had slightly lower rewards then regular pools but i didn't expect to lose 50%...
Is there something wrong with my config or is this normal?

This is not normal.  What's your stale rate?

M

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kwukduck
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July 25, 2012, 12:43:54 AM
 #3024

i've been mining with p2pool for a while now and today i thought of counting what i had mined, the average of the last month is about 0.17 btc/day, i compared this to what i should get at my speed (625MHash) which is about 0.34 btc/day. I haven't used a regular pool for a while now so i can't really say if that would be any better.
I knew p2pool had slightly lower rewards then regular pools but i didn't expect to lose 50%...
Is there something wrong with my config or is this normal?

This is not normal.  What's your stale rate?

M

p2pool window says 9%
I also noticed a big variance in payout 0.02~0.09 btc per payout.

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mdude77
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July 25, 2012, 12:56:38 AM
 #3025

i've been mining with p2pool for a while now and today i thought of counting what i had mined, the average of the last month is about 0.17 btc/day, i compared this to what i should get at my speed (625MHash) which is about 0.34 btc/day. I haven't used a regular pool for a while now so i can't really say if that would be any better.
I knew p2pool had slightly lower rewards then regular pools but i didn't expect to lose 50%...
Is there something wrong with my config or is this normal?

This is not normal.  What's your stale rate?

M

p2pool window says 9%
I also noticed a big variance in payout 0.02~0.09 btc per payout.

I'm far from an expert in p2pool, so I'll throw some simple math out here that I think is right.

Assuming a perfect world, at the current pool hash rate and difficulty, p2pool gets a block ~10 hours.  That's 2.4 blocks a day.

Current pool hash rate is 235g/h, or 235,000 m/h.  Your piece of that hash rate is 625/235000.  Multiply that times block payout, say 50btc even, and you get ~0.133 btc/block.  At 2.4 blocks a day, that 0.32 btc/day.  So I agree with your calculation.

So, we just got a block.  What was your payout?  I'm currently at 4870m/h, pool is as 243,000m/h.  Using the above math, my piece of the pie should be around 1btc, I got 0.89.  I think my shares are low recently - 24 hours ago my payouts were real close to 1btc.

Are you running 24/7?  I think the payout is based on your share of the shares over the last 24 hours.  If you aren't running 24/7, you are cutting yourself short. 

Come to think of it, since the pool seems to fluctuate between 200g/h and 300g/h, there's either something funny going on or a lot of people are shorting themselves.

M

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kwukduck
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July 25, 2012, 01:09:42 AM
 #3026

Yes, i'm running 24/7.

p2pool tells me my hash rate is much lower then my actual mining speed (about 60%) and whenever my miner finds a new share it's not added to the p2pool count.
I recently started it and my miner tells me i found 50 shares (all accepted), p2pool says 15?
very confused...

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mdude77
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July 25, 2012, 01:23:25 AM
 #3027

Yes, i'm running 24/7.

p2pool tells me my hash rate is much lower then my actual mining speed (about 60%) and whenever my miner finds a new share it's not added to the p2pool count.
I recently started it and my miner tells me i found 50 shares (all accepted), p2pool says 15?
very confused...

How much did you get from the last block?

I know my hash rate swings all over the place, between 4500m/h and 5100m/h, depending on when I look at it.  Are you checking the local graphs to give an average, or just at the console?

I've read a few times that there are actually two block chains, one for p2pool, and one for bitcoin, or something like that.  I don't follow the logic at all, but what you are describing makes sense with what others have said.  Maybe someone will chime in who can explain this better.

M

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kwukduck
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July 25, 2012, 01:36:52 AM
 #3028

Yes, i'm running 24/7.

p2pool tells me my hash rate is much lower then my actual mining speed (about 60%) and whenever my miner finds a new share it's not added to the p2pool count.
I recently started it and my miner tells me i found 50 shares (all accepted), p2pool says 15?
very confused...

How much did you get from the last block?

I know my hash rate swings all over the place, between 4500m/h and 5100m/h, depending on when I look at it.  Are you checking the local graphs to give an average, or just at the console?

I've read a few times that there are actually two block chains, one for p2pool, and one for bitcoin, or something like that.  I don't follow the logic at all, but what you are describing makes sense with what others have said.  Maybe someone will chime in who can explain this better.

M

Last block was 0.068, i've seen worse Smiley

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July 25, 2012, 06:02:46 AM
 #3029

Yes, i'm running 24/7.

p2pool tells me my hash rate is much lower then my actual mining speed (about 60%) and whenever my miner finds a new share it's not added to the p2pool count.
I recently started it and my miner tells me i found 50 shares (all accepted), p2pool says 15?
very confused...
What miner is being used... got failovers set up?

-- Smoov
rav3n_pl
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July 25, 2012, 06:28:59 AM
 #3030

Yes, i'm running 24/7.

p2pool tells me my hash rate is much lower then my actual mining speed (about 60%) and whenever my miner finds a new share it's not added to the p2pool count.
I recently started it and my miner tells me i found 50 shares (all accepted), p2pool says 15?
very confused...
Miner is reporting diff=1 shares - pool is using this to tell you local hashrate. Check on your graph that you have doa/stales, i never see to pool reports 60% of actual hashrate. After restarting pool/miner wait 10 mins to pool recalculate your rate in last 10 mins.
Pool reports diff=~600 shares to payout. We are mining p2pool blockchain where we have pool block about every 10 sec and diff is fluctuating depends on speed of last share found.

Thats why you (and everyone mining p2pool) have lot more shares reported by pool than by miner.

Check your graphs, it should show you what is going on.

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mdude77
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July 25, 2012, 09:59:38 AM
 #3031

Last block was 0.068, i've seen worse Smiley

You're right, that's about 1/2 of what it should be.

I think I figured out the two blockchain logic.

One is for p2pool to keep track of who has what proportions, so that when a block on the real chain is found, it can be divvied up properly.

M

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July 25, 2012, 11:16:53 AM
 #3032

Quote
Come to think of it, since the pool seems to fluctuate between 200g/h and 300g/h, there's either something funny going on or a lot of people are shorting themselves.
well, mine varies based on outside temperature and if i'm using my main computer or not, from 2500-6000, i've got another 2000mhash or so, but p2pool doesn't like my hub and the computers that use it get like 50% reject rates.

but i did finally decide to just buy a switch, prolly get here on mon or tues

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).
racerguy
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July 25, 2012, 11:29:43 AM
 #3033

i've been mining with p2pool for a while now and today i thought of counting what i had mined, the average of the last month is about 0.17 btc/day, i compared this to what i should get at my speed (625MHash) which is about 0.34 btc/day. I haven't used a regular pool for a while now so i can't really say if that would be any better.
I knew p2pool had slightly lower rewards then regular pools but i didn't expect to lose 50%...
Is there something wrong with my config or is this normal?

Have you forwarded the p2pool port to allow incoming connections?  Even if you haven't though that low payout is a bit strange
rav3n_pl
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July 25, 2012, 11:56:18 AM
 #3034

I think I figured out the two blockchain logic.
One is for p2pool to keep track of who has what proportions, so that when a block on the real chain is found, it can be divvied up properly.
M
Exactly. Basing on pool sharechain each node can calculate how to cut block prize Smiley
And because closing transaction is included to block it is impossible to cheat Tongue

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July 25, 2012, 12:49:01 PM
 #3035

Yes, i'm running 24/7.

p2pool tells me my hash rate is much lower then my actual mining speed (about 60%) and whenever my miner finds a new share it's not added to the p2pool count.
I recently started it and my miner tells me i found 50 shares (all accepted), p2pool says 15?
very confused...

What does this line say from the p2pool console?

Code:
Local: 1639MH/s in last 10.0 minutes Local dead on arrival: ~0.9% (0-4%) Expected time to share: 24.4 minutes

It should be very close to what your actual hashrate is as it is based on diff 1 shares which have reasonably low variance.  Let us know what the reported hashrate is along with the local dead on arrival rate.

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kwukduck
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July 25, 2012, 03:03:03 PM
 #3036

After running on a pool for 12 hours or so i noticed that also the pool only registers about half of my speed. So i changed my miner, guess what, looking much much better now! I'm going to try on p2pool now see what it does.

I was using DiabloMiner, now changing to CGMiner.

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kwukduck
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July 25, 2012, 03:17:07 PM
 #3037

fixed... no idea why it doesn't work well with diablominer but oh well..

Code:
Local: 637MH/s in last 10.0 minutes Local dead on ar
rival: ~1.1% (0-7%) Expected time to share: 56.4 minutes
The reward is still low but i'm sure it will go up after running for a bit.

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twmz
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July 25, 2012, 08:25:55 PM
 #3038

Some changes have been made to p2pool.info to slightly improve the performance of the page load:

  • The hashrate graph and the stats API (http://p2pool.info/stats) only include one data point per hour instead of one per 5 minutes.  If someone needs/wants the 5 minute data, it still exists in the database (and still gets used behind the scenes), they can contact me and we'll work something out.
  • The block list only shows blocks for the past 90 days.  If you want to see blocks older than that, you'll need to use the API (see the next point)
  • The blocks API (http://p2pool.info/blocks) also only returns the last 90 days of blocks by default, but you can get all blocks by adding a parameter to the request: http://p2pool.info/blocks?all=true

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mdude77
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July 26, 2012, 12:03:30 AM
 #3039

After running on a pool for 12 hours or so i noticed that also the pool only registers about half of my speed. So i changed my miner, guess what, looking much much better now! I'm going to try on p2pool now see what it does.

I was using DiabloMiner, now changing to CGMiner.

You know.. I've observed similar with phoenix.  Phoenix tells me one thing, everything else receiving the data from Phoenix tells me something else.  The apparent higher hash rate is why I use phoenix on my 5870s, but cgminer's output matches what the pools (including p2pool) tell me.  So... I tend think phoenix is lying.

M

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mdude77
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July 26, 2012, 12:04:38 AM
 #3040

Quote
Come to think of it, since the pool seems to fluctuate between 200g/h and 300g/h, there's either something funny going on or a lot of people are shorting themselves.
well, mine varies based on outside temperature and if i'm using my main computer or not, from 2500-6000, i've got another 2000mhash or so, but p2pool doesn't like my hub and the computers that use it get like 50% reject rates.

but i did finally decide to just buy a switch, prolly get here on mon or tues

Wouldn't you do better with something like pps from ozcoin if you are varying that much?  You're shorting yourself in p2pool because it's based on the last 24 hours.

M

MMinerMonitor author, monitor/auto/schedule reboots/alerts/remote/MobileMiner for Ants and Spondoolies! Latest (5.2). MPoolMonitor author, monitor stats/workers for most pools, global BTC stats (current/nxt diff/USD val/hashrate/calc)! Latest (v4.2) 
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