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Bitcoin => Bitcoin Discussion => Topic started by: Perlover on January 20, 2017, 02:00:01 PM



Title: 16 blocks for 60 minutes (and 19 blocks for 90 minutes)
Post by: Perlover on January 20, 2017, 02:00:01 PM
Hi,

https://www.dropbox.com/s/tvb50nykbhvj7kc/blockchain-speed.png?dl=0

Now is very strange situation - 16 blocks for one hour or 19 blocks for last 90 minutes...
SHA-256 fluctations or very quickly delta speed of miners?

What do you think?
Very strange...


Title: Re: 16 blocks for 60 minutes (and 19 blocks for 90 minutes)
Post by: mocacinno on January 20, 2017, 02:02:48 PM
Hi,

https://www.dropbox.com/s/tvb50nykbhvj7kc/blockchain-speed.png?dl=0

Now is very strange situation - 16 blocks for one hour or 19 blocks for last 90 minutes...
SHA-256 fluctations or very quickly delta speed of miners?

What do you think?
Very strange...

Nothing strange... Just pure luck and averages...
The network diff is adjusted every 2016 blocks, so that with the current network hashrate, about 6 blocks should be found per hour on average.

It is possible that one hour, 7,8, or in this case 16 (altough i cannot load the image) blocks are found... IF the time between blocks was less than 10 minutes on average for 2016 blocks, the diff would rise... It's all odds and averages tough.
It is possible there was a jump in hashrate, but in this case, the diff will be adjusted in a maximum of 2016 blocks, so everything returns to normal. It is also possible this was just coincidence.


It IS possible to find 10 blocks in one hour using your CPU, altough the chance is really, really, really, really, really small.


Title: Re: 16 blocks for 60 minutes (and 19 blocks for 90 minutes)
Post by: Jhanzo on January 20, 2017, 02:15:19 PM
Last diff calculation was at 2.4 exahash average and now we're approaching 3 exahash.  I think faster block time is not very unusual with that kind of increase.


Title: Re: 16 blocks for 60 minutes (and 19 blocks for 90 minutes)
Post by: Perlover on January 20, 2017, 03:22:13 PM
1,5 hour later:

13 blocks in hour

https://www.dropbox.com/s/kqeg7rw3f8p9d8m/blockchain-speed-2.png?dl=0
...


Title: Re: 16 blocks for 60 minutes (and 19 blocks for 90 minutes)
Post by: xhomerx10 on January 20, 2017, 03:28:50 PM
Solving blocks is probabilistic so this is perfectly normal behaviour.  If blocks were solved at regular intervals, Bitcoin itself would be suspect.