Feathercoin Hash Rate at Difficulty change 25-08-2013
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Between 7 am and 17 hours on Saturday 24th 8.2013 the Feathercoin Hash rate increase to ~8.6 GHash/sec from the preceding rate of 2 GHash/sec. 484 Blocks were made in 10 Hours, over double the 240 Block specification. That overpaying those miners by 240,000 (FTC).
There were no forks or transaction time irregularities. The increase in Feathercoin coincided with a 3 GHash /sec decrease in Litecoin mining.
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Between 18:00 and 03:00 22.8.2015 the Feathercoin difficulty changed from 193 to 137. At this point the Feathercoin Hash rate increased from 2 GHash / sec. to 7.9 GHash / sec
In the 10 Hours 240 Feathercoin Blocks should have been produced, 519 were, so that is overproduction of 219 Blocks or 55800 FTC. Or approximately 1 days production in < 1/2 Day.
Purple Line Percentage of Specification production,
Blue Line - 100 % production, 24 coins per hour.
Green Line Actual Feathercoin Block production per Hour
Yellow Line - Difficulty[attachment deleted by admin]
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Based on the recent higher levels of Hash rate variation on Feathercoin Block production I have further refined the optimum difficulty adjustment algorithm and adjusted frequency.
Based on the short term variation we are now, saved from an out right 51% attack (of say evil 3 GHash/sec) by an additional change over of 4 GHash/sec of other miners coin hoping. Feathercoin has gone up from average 2.5 GHash/sec to ~ 9 GHash/sec over the last 48 Hours.
Because the change happens very rapidly I have reduced the proposed Difficulty adjustment frequency to 50 Blocks.
I have adjusted the historical Average sample to 50 Blocks, 504 Blocks and 10,000 Blocks.
I am also now suggesting an addition feature, to stabilise the Difficulty, the difficulty is only recalculated if Difficulty change > 15% (to be agreed)
I’ve just been looking at the coding in FeathercoinQT /src main.cpp, CTxMemPool::accept etc. and it doesn’t look like it would be a hard change to make - like the Autocheck Points code looked really hard…
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At 04:00 am 27th August 2013 - the Feathercoin Difficulty changed from 197 to 137.
I’ve updated the chart up to 21:00 am 27th August 2013. I’ve added a simpler chart showing hourly production against Difficulty.
The Purple Line should be at 100%. During the 193 Difficulty it was < 50 %, at 137 there has been a Hash rate increase and it is averaging over 200% the correect roduction rate.
The Green Feathercoin production line should be along the Blue line, the specified production the difficulty change is trying to enforce.
The Yellow is the Difficulty.
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