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Sunday 13 October 2013

October 13th 2013 weekly pool and network statistics



Other weekly pool and network statistics posts


Welcome, miners.

Changelog:
  • Added "For Pierce and Paul" and "Alydian5335" to the weekly stats.
Usual pools missing from results:
  • Nil
Errors:
  • Nil
Pools with coinbase signature:
Note - now treating "For Pierce and Paul" as a hashing entity/pool rather than just a message.

Recent coinbase messages:

Pool hopping:
  • Nil.

1. As well as the canonical message sender, Discus Fish is now also for Pierce and Paul.
I've now added the anonymous P&P as a pool, at about 85Thps. Interestingly, Discus Fish have also appended some of their blocks with the same message - however, payments go to different addresses.

2. DDOS' this week
More DDOS, BTCGuild and Eclipse being affected, Eclipse significantly so (see figures 3 and 4). If there are significant advances in anti-DDOS technology, I wouldn't be surprised to see it develop as a direct result of the ridiculous number of DDOS attacks on mining pools.

3. Dirty pictures
Also on figure 4 is a very strange, almost tallywhacker-like extrusion, consisting of a 100 Thps increase and decrease in BTCGuild's hashrate. I haven't seen anyone take credit yet, but that entity is surely doing to smaller miners exactly what a tallywhacker is meant to do.

Please note that 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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