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Sunday 20 October 2013

October 20th 2013 weekly pool and network statistics




Other weekly pool and network statistics posts


Welcome, miners.

Changelog:
  • Pools that don't find a block or for which I can't get data are not included in the weekly statistics and charts.
Usual pools missing from results:
  • GHash.IO - can access the API at them moment.
Errors:
  • Nil
Pools with coinbase signature:
Recent coinbase messages:

Pool hopping:
  • Nil.

1. Network solves 1523 blocks this week: 9th highest block solve rate ever.
With the addition of KNC miners starting to arrive over the last two weeks, the hashrate has increased significantly, difficulty increased by almost 50%. Even so this week is only the 9th highest number of blocks solved in a single week - more than twice that many were solved in the heady days just after the opening of MTGOX.


Top weekly block solves in the past:


1 2010-07-18 3403
2 2011-05-29 1690
3 2011-05-22 1655
4 2011-02-27 1600
5 2010-11-14 1562
6 2011-06-19 1539
7 2010-08-15 1534
8 2010-10-31 1530



2. Unknown this week
The very large percentage of unknown this week is mostly due to GHash.io. I was unable to access the pools' API this week, and they're not signing the coinbase of solved blocks, so my backups didn't work either. Hopefully it will all be sorted out by next week.

3. Dirty pictures - again
(see figure 4) Poor BTCGuild is again the victim of user 215613, whoever it is. It seems that they just want to make BTCGuild's hashrate look like a rude picture rather than contribute to the pool full-time. Or am I the only one seeing this? Maybe it says more about me than them.

4. Eligius is up
Since July Eligius has been a solidly performing middle ranked pool. This week however their hashrate increased significantly, and (with the absence of GHash.IO) Eligius is now in second place behind BTCGuild.

5. Eclipse has ups and downs
(see figure 4) Check out the bouncing hashrate at Eclipse this week - it's up and down like a bride's nightie. Someone testing there? Maybe user 215613? Odd though, same thing happend last week too.

6. 50BTC is down
Once they were heirs to BTCGuild's crown - but since July they just haven't been able to keep up with the network's increase in hashrate. They are offering ASICs for sale so I hope this helps increase their hashrate.


Organofcorti lives!

As usual, please post comments if there's anything you don't understand, with which you disagree, or just think is wrong.

The charts

Table: Table of all pools with public data and their various statistics averaged for the last seven days - for smaller pools the average may be more or less than seven days, depending on number of blocks solved for the week. Network hashrate and that of some pools are estimates, the upper and lower 95% confidence interval bounds are included.
Figure 1: Pie chart of the percentage of network blocks hashrate by pool. "Unknown" combines those pools for which I can't scrape statistics, solominers and private pools. The percentage of network hashrate will only be approximate since the exact network hashrate is unknown.
Figure 2: Chart of network hashrate, hashrate of the largest mining pool, combined hashrates of the three largest mining pools, and a line representing 50% of the network hashrate. Handy if you're worried about 51% attacks. The upper and lower 95% confidence interval bounds for the network hashrate are in between the shaded areas.
Figure 3: Chart of chronology of pool hashrates, averaged per week.
Figure 4: Chart of average hashrates per pool per round for the week, and per 144 rounds for the network. The upper and lower 95% confidence interval bounds for the network hashrate are in between the shaded areas.
Figure 5: Chart of chronology of negative binomial CDF probability of shares submitted and blocks produced for the week.
Figure 6: Chart of chronology of round length divided by difficulty, averaged per week.
Figure 7: Chart of hashrate vs round length for hoppable pools (the larger the hashrate increase at the start of a round, the larger the loss to strategic miners).
Figure 8: Chart of pool user hashrate distribution. Note that for some pools this average is over twenty four hours, some pools are averaged over an hour or more and some for only fifteen minutes, so expect some variance in the results.




















Thanks to blockexplorer.com for use of their network statistics.

organofcorti.blogspot.com is a reader supported blog:

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