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polyminer1 / rhminer

RandomHash miner for the PascalCoin project
GNU General Public License v3.0
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more Failed hashes due to duplicate in v1.4 #6

Closed hashbullet closed 5 years ago

hashbullet commented 5 years ago

Started using rhminer v1.4 and found a lot of failed hashes due to duplicate. The amount of failed hash is related to the mining speed (resources). Currently a cpu only mining (i5 8400 - 6 cputhreads) reported 13 failed in ~30mins. a CPU + GPU mining reported more failed hashes. The duplicate submission typically happen 2-3 submission after the actual (first accepted) submission. where as in rhminer v1.3 din't report a single failed hash over multiple weeks on the same hardware.

the same behavior noticed both in CPU only and Volta versions (the only two I tried).

hashbullet commented 5 years ago

image It appeared again today. 124 failed over 9hrs of mining. Used C3pool this time. (issue was created based on Pascal pool mining).

polyminer1 commented 5 years ago

Failed shares are not like rejected shares. Failed shares are locally duplicates. Meaning, you have many cores and 2 of them found a valid nonce within the same work package. RHhminer wont submit the duplicates because then the pool will reject them for their are duplicates ! This is inherent to the nature of RandomHash cuz and there is no real way to make this number go lower. In V1.4, I managed to reduce this from 1.2% to 0.7% on average, but that is it.

hashbullet commented 5 years ago

Ok. in that case I will live with this.. as I indicated before, I was never experienced a failed share in v1.3. so was not sure whether it is a bug or random.!