23rd December weekly pool and network statistics

Welcome, miners.

Stratum seems to be doing good things for Slush's pool - now with its highest percentage of the network since I started recording pool statistics. And since there is still no obvious pool hopping happening at Slush's pool, the miners there must be happy.

Deepbit is also seeing no obvious pool hopping, so once again Chart 8 will be incorrect for them. In fact, looking at recent rounds from all the hoppable pools, there appears to be no pool hopping there, either. I imagine all the pool hoppers are keen to stay off Santa's naughty list this Christmas. Maybe pool hopping will start again when college break is over.

The week's average pool hashrate took another dive this week. It seems that the most recent daily hashrate indicates a spike up to 30Ghps; whether this was due to some lucky short rounds or an actual increase in connected miner hashrate will remain to be seen.

Put that computer down,  get outside and enjoy the sun! Unless you're in the Northern Hemisphere in which case keep warming yourself over your GPU. Have fun on your holidays,  and I'll see you all on New Years Eve.

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. Network hashrate and 50BTC.com hashrate are estimates, the upper and lower 95% confidence interval bounds are included.

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 fulltime miner earnings loss at a proportional pool caused by pool hoppers, expressed as expected PPS earnings for fulltime miners. Currently only for Bitlc and Deepbit. Only valid if strategic pool hopping is actually occurring (see figure 7).

Thanks to blockexplorer.com and blockchain.info for use of their network statistics.

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