Why does the hashrate for iXcoin spike then drop massively then repeat every few days?
It was at 10 PH and now it's at 6. I've seen it do this many times. So who would start heir gear on merge mining then say: oh, I don't want these coins for free and stop mining iXcoin? That makes no sense. Once you set your gear to merge mine you set it and forget it.
So is there a way to do stealth mining? And are these peaks on hash rate more like blips on a radar, showing the real hash rate? Kind of odd cause I don't see it on NameCoin nor as much on BTC. Although DVC Seems to have the same thing going on.
These spikes are occuring for all the merge mined coins and BTC. BTC hashrate is 11 peta hash rate, but it was like 19 the other day.
My take is that the 28nm miner manufacturers are testing their equipment.
I am actually a bit surprised that it is affecting hashrate for IXC. Could it be another pool is testing merge mining? Are they testing their hardware using merge mining?
Every time difficulty is adjusted it takes a lot of blocks before a new average time between blocks can be figured out and the random time it takes to find blocks can be averaged over enough blocks to make a reasonable guess at the current hash-rate.
So when the adjustment happens, if the next block happens to be lucky (fast) poof the average taken over just one block looks like huge hash rate. A few thousand blocks later, if difficulty has not already changed again already, you can make a better guestimate of hash rate because the average time between blocks might by then be statistically meaninful instead of being just a random number that is really measuring luck not hashrate.
So even with bitcoin itself, every time difficulty changes it takes a lot of blocks for the guesses / estimates of how much hash rate might be out there to start to stabilise at reasonable guesses instead of just being a measurement of how lucky people have been so far since the difficulty changed.
IXCoin probably changes difficulty sooner/faster than bitcoin does, as an attempted defense against fly by night miners stranding it at high difficulty. So chances are it does not even stay at any one difficulty long enough for the averae time per block to settle down to a reasonable average before poof the difficulty changes and the averaging has to start all over again. So chances are it is always as much a measure of luck as a measure of hashrate.
All you really know is the difficulty.
For coins that take many many blocks before changing difficulty, if you estimated the hashrate as of the last block before the difficulty changed, that would give you the best estimate but even then it would only be estimating the average hash-rate across that many blocks, not the hash rate at that moment.
-MarkM-