[4+ EH] Slush Pool (slushpool.com); Overt AsicBoost; World First Mining Pool

[gourmet]

I do not think it is very difficult. The value of each share you submit is calculated with the following formula:

score_share = exp(t/C)

where t is round duration in seconds, and C is a constant, currently 200. This means the value of each share is exponentially growing, so old share have significantly lower value compared to recent shares. So if you stop mining while others don't, your part of total pool score for that round will decrease exponentially. You can read the original post about this reward calculation method here: https://bitcointalk.org/index.php?topic=1976.msg50002#msg50002.

Additionally, based on measurement I have found that each hour, t is reset to zero and your score is divided by exp(3600/C). This is probably to prevent an arithmetic overflow (see http://en.wikipedia.org/wiki/Arithmetic_overflow).

Hope this helps,
   T

(emphasis by me)

(Also the whole pool's score is reduced by the same factor, not only yours.)  :-)
[edit] (In fact, it's the pool's score that is the candidate for arithmetic overflow, not the your one...) [/edit]

Thank you very much for posting the constants that resulted from your research, Tibor!

[1713856730]

1713856730

[gourmet]

mining.bitcoin.cz

Website is under the maintenance, but mining works without an interruption. You can follow updates on Facebook page.

I'm not on fb and won't be.
I'd prefer another place for such announcements, some "normal" pages like here on bitcointalk e.g.

(BTW, I can't see any (public) announcement on this event on the ffb.)

[gravitate]

ps i am a noob. Do my stats look normal?

Name   ID   Temp   MH/s   Accept   Reject   Error   Utility   Last Share Time
AMU   0   0   335.66   258   0   35   0.29   21:03:55
AMU   1   0   335.72   269   1   54   0.3   21:11:22
AMU   2   0   335.57   266   1   32   0.3   21:10:29
AMU   3   0   335.98   281   2   34   0.31   21:10:37
AMU   4   0   335.71   245   0   39   0.27   21:07:18
AMU   5   0   335.93   269   0   45   0.3   21:11:54
AMU   6   0   335.95   269   1   45   0.3   21:11:50
AMU   7   0   335.72   256   1   42   0.28   21:10:09
AMU   8   0   335.77   252   0   40   0.28   21:07:05
AMU   9   0   348.97   22   2   1922   0.02   21:06:55
AMU   10   0   335.97   261   0   42   0.29   21:12:26
AMU   11   0   335.57   248   1   46   0.28   21:12:40
Totals   12      4042.52   2896   9   2376   3.22   

I take it you have USB Eruptors? what kind of hub are you using? Port 9 is way off...if the power supply is right and cooling I only see less than 1% error on mine. So all yours seem to have a high error rate and like I said port 9 is way off.

I also hope #19421 gets fixed.

Hi thanks I am using 3 hubs and one of them is plugged into the raspberri pi itself I am guessing this one is the problem. I have a fan on all of them.. I will be buying a better hub however. I have wasted a lot of money on hubs so far

[aurel57]

Hi thanks I am using 3 hubs and one of them is plugged into the raspberri pi itself I am guessing this one is the problem. I have a fan on all of them.. I will be buying a better hub however. I have wasted a lot of money on hubs so far

So which hubs are you using? Running 4 on each? What is the volts and amp on the power adaptors?

[willinliv]

Anybody thinking this block is a little light?


19421   2013-08-03 01:52:48   7:09:54   160946644     22010   0.00193569      249905   25.17464593    92 confirmations left

I think I lucked out with that one - highest earnings on a single round so far for me! Thank you for your donations:

19423   2013-08-03 06:15:47   2:28:32   54379598   4192   0.00211264   249940   25.44683309    86 confirmations left
19422   2013-08-03 03:47:15   1:54:27   42104601   3140   0.00178380   249923   25.05371000    69 confirmations left
19421   2013-08-03 01:52:48   7:09:54   160946644   11999   0.00971988   249905   25.17464593    51 confirmations left
19420   2013-08-02 18:42:54   0:02:03   759065   68   0.00217892   249855   25.08682056    1 confirmations left

at least someone benefits from our losses....

Easy come easy go:

19423   2013-08-03 06:15:47   2:28:32   54379598   4192   0.00211264   249940   25.44683309    38 confirmations left
19422   2013-08-03 03:47:15   1:54:27   42104601   3140   0.00178380   249923   25.05371000    21 confirmations left
19421   2013-08-03 01:52:48   7:09:54   160946644   none   none   249905   25.17464593    3 confirmations left
19420   2013-08-02 18:42:54   0:02:03   759065   68   0.00217892   249855   25.08682056    confirmed

[angryrob]

I just checked mine and with 2 confirms left, block 19421 is now showing a normal reward.

[cosurgi]

I just checked mine and with 2 confirms left, block 19421 is now showing a normal reward.

yep. fixed now.

[drewage]

I just checked mine and with 2 confirms left, block 19421 is now showing a normal reward.

yep. fixed now.

 

[gyruss]

 

I'm still seeing a reduced reward for 19421 (249905). I was actively watching it and about 1-2 hours before the block was solved, I saw my estimated reward drop from 0.003xxxx to 0. Then it slowly built up little by little, to  0.0015xxxx, bur never recovered. This really sucks because the round lasted over 7 hours.

Unfortunately, I've decided to stop mining there for the time being until the issue can be confirmed as fixed.

- G

[aurel57]

I see the pool is pushing close to 30,000 GH/s and the difficulty went up today to 37392766... I keep adding miners but just can not keep up ..

[angryrob]

19436, 19437, and 19438 all just over half reward for me... and that is half with regards to our new increase in hashing power.(another 3+ TH/s! nice!) Wondering if it's cause of the increase hashing power that blocks need to be recalc'd more often. or maybe i just don't notice it so much sometimes as I do right now.

[drewage]

19436, 19437, and 19438 all just over half reward for me... and that is half with regards to our new increase in hashing power.(another 3+ TH/s! nice!) Wondering if it's cause of the increase hashing power that blocks need to be recalc'd more often. or maybe i just don't notice it so much sometimes as I do right now.

I agree they do seem a bit off but the luck has been nice.

[cosurgi]

19436, 19437, and 19438 all just over half reward for me... and that is half with regards to our new increase in hashing power.(another 3+ TH/s! nice!) Wondering if it's cause of the increase hashing power that blocks need to be recalc'd more often. or maybe i just don't notice it so much sometimes as I do right now.

I agree they do seem a bit off but the luck has been nice.

For me the rewards are OK for those blocks. Yes, they are lower than usual, but are actually higher than 25*my_hashrate/total_pool_hashrate, so I'm happy.

The rewards are lower because pool hashrate increased so much tonight: 32 TH !!

[bspurloc]

I see the pool is pushing close to 30,000 GH/s and the difficulty went up today to 37392766... I keep adding miners but just can not keep up ..

yeah each diff negates 660mh/s!
but this -=> 31334.034 Ghash/s hurts too! hah

[tronic1704]

I think, the comlete last Reward-Calculations are not correctly.

normaly it was between 0,08 and 0,1 per block and now it´s only 0,05 and 0,06.

Think should be stop Mining at Slush.  At #19437 i got only 0.00000192 by 27750 shares.   

[trasla]

but this -=> 31334.034 Ghash/s hurts too! hah

I am glad i don't get hurt by stable payout curves at all.

[d20_9999]

Rookie question:

I have 9 of the Block Erupter USB sticks hashing all on the same rig, which averages about 3 Gh/s.  Should I set the difficulty for the worker to 2, since the total hashing power is over 2 Gh/s, or should I keep it at one, since each stick only has 335 Mh/s of power?

Keep at 1, else endless discarded.

?
I've always believed that the rig should behave like one worker with combined power. Is there any reason for discarded shares other than bad configuration/setting?

Interesting note:  I have accounts on BTC Guild and Bitminter as well.  If I point my nine Erupters to either of their pools, with a worker set to a difficulty of 1, both pools auto adjust the difficulty up to 2.

I might have to do a little experimenting, and compare 24 hour totals.

[bigbeninlondon]

Nine hour block!!! Ughh!   

[jarhed]

Nine hour block!!! Ughh!   

Yea WTF. Now I'm trapped.

[MinermanNC]

wow what a long block! glad im mining FTC for the moment with GPU's...actually making money again Asics are ordered and ill be back here....soon i hope!!!