8th September weekly pool statistics

Mt Red's website was down tonight, so no data for them. Sorry Mt Red miners. All other pool websites were up.

In other news, I've added a new chart for measurement of pool luck - the negative binomial lower tail CDF probability of the number of shares submitted resulting in a number of rounds (actually, the Gamma distribution approximation of this). A probability close to 0 mean the pool was very lucky;  a probability close to 1 means the pool was very unlucky. The advantage of this method is that unlike the other two methods, variance is not being measured so pool hashrate does not have an effect on the result. The luck of a large hashrate pool will be directly comparable to that of a smaller hashrate pool.

Since I think this is a more useful measurement of luck when comparing pools, it is at position 5, above the other two luck measurements.

If your pool isn't here and you'd like it to be, comment with  a link to a block history with round lengths and either solve times to the nearest second or a timestamp.

Average hashrate:

Average hashrate = Total shares / Total round time

Luck index:

log(% of network blocks solved / % of network hashrate)

Luck index = 0 is average luck

Luck index > 0 is good luck

Luck index < 0 is poor luck

Weekly average round length as a fraction of difficulty:

Average number of shares submitted per round / difficulty

Figure 1: 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.

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.

Figure 3: Chart of chronology of pool hashrates, averaged per week.

Figure 4: Chart of average hashrates per pool per round for the week.
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 pool luck indexes, averaged per week.
Figure 7: Chart of chronology of round length divided by difficulty, averaged per week.
Figure 8: Chart of percentage of orphaned blocks produced by the pool, averaged per week.
Figure 9: 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).

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