Re: [450 TH] Slush's Pool (mining.bitcoin.cz); TX FEES + VarDiff

It happened again. I can see that I mined all the way through round 21233. Never switched to the backup pool. My shares for round 21233 are proportionally correct for the duration of the block. No apparent dropouts from the Stratum Proxy. Every thing looks correct except BTC reward for Round 21233 is ZERO!. What's up with that? Again, very little lost but it should have given me at least 0.0025 or so BTC for that round. Something wrong with this one. The exponential decay function could not have zero'ed my shares which were 1/10,000 of the total. 1/10,000 of 25 BTC is 0.0025, not zero.

Round Duration Total Shares My Shares BTC Reward Block # Block Value Validation
21236   1:04:02    445846104    62580    0.00375781   276297   25.08008069    94 confirmations left
21235   0:31:04    215263719    33420    0.00407103   276290   25.07021854    87 confirmations left
21234   11:36:07    4869485213    455502    0.00342830   276286   25.20665744    83 confirmations left
21233   4:49:31    2040992243    193643    0.00000000   276206   25.04204200    3 confirmations left
21232   1:10:32    499330676    72415    0.00332870   276185   25.07522347    confirmed
21231   4:16:34    1810725132    255048    0.00335437   276177   25.03722000    confirmed

Running 2 AsicMinerCubes: For example, available in groupbuy here: https://bitcointalk.org/index.php?topic=375247.0. Each cube running as a separate worker.

Running Slush Stratum Proxy on local PC which looks to be running fine.

Hash rate reported on Slush pool stats for the two cubes agrees with hash rate reported locally on the cubes and the hash rates indicate the units are running at top speed, no lagging. I am getting top rated performance from each of the cubes.

If there was a problem with the Stratum Proxy on round 21233 then it corrected pretty quickly since I got the correct ratio of My Shares vs. Total Shares, i.e. similar ratio compared to the other two long duration rounds that did reward BTC.

Round 21231: Roughly 1:10,000 My Shares to Total Shares, Paid out
Round 21233: Roughly 1:10,000 My Shares to Total Shares, No Reward
Round 21234: Roughly 1:10,000 My Shares to Total Shares, Paid out

This is simply not true.
More exact ratios your/total look like this:

21231 0.000140854
21232 0.000145024
21233 0.000094876
21234 0.000093542
21235 0.000155251
21236 0.000140362

You can see a dropout at the end of 33 and begining of 34. That is the reason.

[edit]
Mining must have been out for about 1.5 hours at the end of 21233 and ~4 hours at the beginning of the following round.

Case solved. I believe you are correct sir! Must be something still wrong with my Stratum Proxy.

The exponential decay function was a killer making the first 2/3 of that round worthless to me because I missed the last 1/3. On the next round, missing the first 1/3 did not seem to cost me anything in payout. Makes me think I could have missed the first 2/3 of that round and still received roughly the same payout.

The exponential decay function is a hard master, punishing those who miss the end of a round and rewarding of those who work the end of a round.