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

I have a some older technology Getwork miners working through a Stratum Proxy hashing on Slush. Running around 50 to 70 GH combined

I had one recent round, 21228, where I had no reward for any shares. What is up? The value formula indicates the reward should have been 0.0013 BTC. "The reward earned by a given user is given by the following formula:
(25 BTC + block fees - 2% fee) * (shares found by user's workers) / (total shares in current round)"

Not much loss but it seems like something is wrong or I don't understand the BTC reward algorithm, or I don't undestand reward reporting.

Round Duration Total Shares My Shares BTC Reward Block # Block Value Validation
21230   1:43:31   728080133     102720   0.00390706   276139   25.04945416    98 confirmations left
21229   9:39:26   4091124633     480476   0.00383220   276127   25.12559563    86 confirmations left
21228   4:35:30   1928606238     102602   0.00000000   276067   25.17414052    26 confirmations left
21227   0:46:16   323420163     47502   0.00321315   276036   25.06559435    confirmed
21226   0:14:56   104058374     13282   0.00321300   276031   25.01980000    confirmed
21225   1:07:44   472925199     64496   0.00285957   276029   25.20153852    confirmed
21224   0:04:17   29652709     4292    0.00351801   276018   25.03507003    confirmed
21223   1:52:10   783569002     58652   0.00273363   276016   25.05123438    confirmed

Round 21224 sure was a winner!

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

What kind of hardware? Blades? Wondering if there's a problem with the Stratum proxy... I'm not getting 0 rewards but I am seeing my miners get skimmed on their reported hash.

When you look on your account page are the hashes reported accurate to what your miners show locally??

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