Triple reward at every "7th" day must be changed. We also need KGW implented.
Look at block
89519 found at 2014-03-09 21:25:01.
At this block the difficulty changed to 0.045 and therefore it was very very easy to mine.
60 blocks later should normaly take 1 hour, but block
89579 was instead found at 2014-03-09 21:28:22
That means someone took the opportunity to mine 60 blocks of 30k NDL within just 201 seconds. That said, someone threw ~57MH/s precisely for this 60 blocks at NDL.
( time = (diff * 2^32) / hashrate )
Now we are stuck with a difficulty of 0.73 which means an average block time of 19 minutes (instead of 1) at the current net hashrate of 2.76MH.
This is easy to increase five- or tenfold if we all help out for a moment. But this is no longterm solution as this will happen again and again for the profits of one.
Lessons we have learned:- Don't encourage miners to come by only once a week
- Implement more intelligent difficulty retarget algorithm