Topic: [1500 TH] p2pool: Decentralized, DoS-resistant, Hop-Proof pool - page 654. (Read 2591928 times)

My p2pool efficiency is only about 93%, someone has a clue what the reason for this could be?

I run my p2pool instance on a server with 100mbit/s connection, my latency to the server is about 20ms.
My miners are cgminer (with icarus boards) and btcminer (with ztex quads).
I rarely run any downloads on my local link to avoid an increase of latency and thereby stales. I even have qos set up to prefer my miners traffic to the normal web traffic while surfing. But efficiency still sucks hard.
Any ideas what else I could try?

The pool hashrate and round duration are used to estimate the number of difficulty 1 shares.

Include me in there, I've only found 5 shares in the past 24 hours.

How is that done exactly? Does it count all of the high difficulty shares or does it translate them into difficulty 1 shares?

I should have thought of that, twmz. Yes, I take "now", subtract 7 days and include only rounds completed in that time. So i missed that stonking great round. Good news is your stats will show a much improved 7 day luck shortly

Which just goes to show that the 7 day luck isn't something mdude77 shouldn't be basing his mining decisions on just the last weeks rounds - the variance in such a short period of time can be huge.

You didn't include this very long block in your calculation (and p2pool.info did):


Probably you and p2pool.info just used a different definitions of "last 7 days".  p2pool.info includes rounds based on their end time (the timestamp of when the block was found).  So, the 7 day luck calculation include all blocks that were found in the 604,800 seconds (7 days) since the most recent block was found (not since "now").  

At the time of your post, the most recent block had been found at 1344745354.  So the cuttoff was 1344745354 - 604800 = 1344140554, which means that the long block found at 1344216828 was included in the 7 day range.

Comparing rounds per day isn't helpful unless you also compare hashrates. And yes, you earned less this week than last because there was even better luck last week. Even comparing your week's earnings with last weeks is tricky unless you have a large hashrate.


Good idea. But remember, your variance will be a bit higher at p2Pool so make sure you make the comparison over a substantial time period.


This too. I hadn't thought of that until racerguy brought it up. If p2pool has 1/4 the hashrate of Ozcoin, you should average your results for p2Pool over four times as long. Even at one week for Ozcoin and 4 weeks for p2Pool, you'd still have at 95% confidence interval of +/- 18%. And which week would you select for averaging at Ozcoin?

Still, it's a great idea mdude77, and getting more "hands on" in this fashion might help you get a feel for the differences between pools. Good luck, and a weekly update on your progress wouldn't go astray on the Weekly Pool Statistics thread.

I don't know for sure but when talking about pools in the 300-500ghash range I don't think 1 week is long enough for luck to even out to a reasonable level(maybe organofcorti knows how long it would take). 

We were doing great until the last week.  We went from 3-7 blocks a day average to 1-3 blocks a day average, with lower payout per block.   (Note the p2pool.info stats show great numbers except for the last week.)

I'm going to do a week comparison.  I can now easily split my miners 50/50, so I have 2.6g/h going to ozcoin at 5% donation, and 2.6g/h going to p2pool. 

M

I've been averaging 0.126btc/day over the last 37days on p2pool with my 5770, my guess is my avg hashrate is just below 200mhash/s(I game as well sometimes on the 5770).  This is well above 100%pps so I can confirm our recent good luck is real but the p2pool.info stats may be a bit off somehow.

On an unrelated point my 5770 is only 5$ away from paying for itself over those 37 days.

Yes.

I don't know what the stats page is measuring for luck. At a guess, it's probably measuring the inverse of round length / D. So if you want to compare the actual result to anything, compare it to 1/0.89 which makes it about 20% different.

It's just coincidental that your number is .02 different from the number on the stats page?

M

I don't think it's that. I'm using the same data the luck graphs should be using, and this is not just a few percent points of difference. This is going from shorter than average rounds (what the data shows) to longer than average rounds ( what the luck graphs show).

I'm not trying to pick a fight with the p2Pool.info guys - I think that website is invaluable. I just think the luck graphs need to be fixed.

What you do is take all the "ActualShares" and divide by all the "ExpectedShares", and then take the average (add all the ActualShares/ExpectedShares and divide by the number of rounds, 22 in this case). That average is 0.91. This means that the rounds were 9% shorter than expected which means you solved more blocks for your shares (or it took fewer shares to solve your blocks.)

Round length / D gets smaller with good luck and larger with bad luck, and is what I was referring to. I'm not sure how the luck is calculated on the p2Pool graphs or what it means, exactly.

Anyway, the available stats say the good luck is still rolling for p2Pool. Don't sell it short!

I think p2pool's hashrate is slightly underreported seeing as stales aren't included in the hashrate calculations even though stales can be blocks.

Your math and statistics always befuddle me.  But this one I think I can do.. but I'm not going to.  I'm going to assume your math is right, just question your conclusion.

p2pool.info shows the last 7 days as 0.89.  I could see rounding error being the difference between your 0.91 and p2pool.info's 0.89.

What I'm not understanding is how that's better than average?  I thought 1 was average?

M

actually they're lower than ltc atm even though litecoin produces something like 3 times as many coins/day.

I think there's something wrong with the p2Pool 7 day stats. If you calculate manually, the last 7 days is better than average luck. In fact, there's been better than average luck at p2Pool for the last 6 weeks now. Check the last 7 days for yourself:



The average round length / difficulty = 0.91. This is better than average.

We're now down to 89.5% for last 7 days.  It's been a really rough 7 days.

30 days is still > 100%.  If/when it drops to 95%, I'm switching back to ozcoin.

Does anyone know for sure if this is a really bad luck streak, or a scaling issue?  We were doing great until the additional 120g/h came online.  Seems awful coincidental to me.  And I don't believe in coincidence.

There are a lot of people here who know a lot more about how mining and p2pool works than I do.  But I haven't seen anyone chime in and indicate whether this appears to be a scaling issue, or a bad luck streak.  Surely there would be tell tale indicators if it was a scaling issue that would help us determine if it's really bad luck or not?


***DOUBLE EDIT - I did my math wrong twice.

My stale rate hasn't increased.. I'm hovering around 5%.  Pool stale rate hasn't changed that much either.
My payout is higher than it should be for 1% of the pool hashpower.  Right now the pool is at 500g/h, I'm at 5 g/h.  That's 1%, so I should get a payout of .5btc.  The last couple days I've been around .6 to .65.  That tells me someone, or a bunch of someones out there aren't getting their fair share of hashes.

I really don't like the idea of leaving.. but I'm not seeing bright ideas as to what's going on.  Hopefully those bright people are furiously coding behind the scenes.

M

Thanks, but I like Ozcoin.  I usually go PPS which is 5% anyhow.

M

bitminter.com. Ozcoin about to introduce fees, bitminer gives perk of not having to wait for confirmations if you just donate a measly 1%