16th September weekly pool statistics

Good news, everyone! All websites were up this weekend. 

Itzod continues to grap a greater proportion of the network hashrate and seems to be doing quite well. Ozcoin's hashrate has clearly levelled out - it's interesting how very stable their hashrate seems to be now that proxy pools are using them less.

Another interesting change is DeepBit's average hashrate per round as a function normalised shares per round (Chart 9). They are being pool hopped a little less, but much more interesting is the fact that since the 26th August weekly pool hashrates they don't seem to have a decrease in hashrate at the start of a round anymore. I wonder what changes they've made to the pool servers?

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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