dividing the number of chains needed by the available resources gives you the time needed to finish the tables. so given 2000 chains/sec which is the speed of all nodes reporting status, and 2^37 chains needed, that would be: 105 weeks. if we want to be done by xmas, we need 8 times as much power.
a gtx260 (700mhz) with 216 cores gives 162 chains/sec peak, a 9600M-GT (500mhz) with 32 cores gives 20 chains peak. so you get around 0.00107 (gtx260) and 0.00125(9600) chains per (core * mhz * second). although the frequency is not really the core frequency, but since shader freq is usually linked to GPU freq, i got used to calculate with the GPU freq. more new text below. > i really didnt understand your answer . anyway according to table > structure can we divide the amount of chains needed to produce with > the amount of computing resource ( Cores , any other factor ? ) come > up with a parametric number ? > > ---------- Forwarded message ---------- > From: *Sascha Krissler*<[email protected]> > > since the tables will be uploaded, there is no need to do this. it does not make sense to compute the tables for yourself, since they will already be produced with the current network. > if you want to decrypt messages without the network, you will probably > want to use an FPGA with the proper size and you would need some > very fast SSDs. take a look at the TableStructure node in the trac > wiki with the network that is proposed, you distribute the precomputation time and disk accesses across several nodes. if you wanted to do this all on your own, you would need much computing power and hardware that can do many IO Operations per unit of time. If you want to do all the precomputation yourself, you would need 380 fast gpus, which will need 38 kW of power. and you would have to do 2,5 million disk accesses which would take half an hour with one hard disk (assuming 1ms access time). > for some computation. if you used a hundred GPUs to do the precalculati > on > during the lookup, you would need a several kW power line. > > if somebody wants to build all the tables in house how to compute > > needed resources and time ? i want to simplify things by having a > > formula around to put the amount of cores , frequency ( considering > > overclocking is possible and this is also a variable ) and other > > factors all together . all ideas are appreciated > > > > _______________________________________________ A51 mailing list A51@ > lists.reflextor.com http://lists.lists.reflextor.com/cgi-bin/mailman/ > > listinfo/a51 ________________________________________________________________ Neu: WEB.DE Doppel-FLAT mit Internet-Flatrate + Telefon-Flatrate für nur 19,99 Euro/mtl.!* http://produkte.web.de/go/02/ _______________________________________________ A51 mailing list [email protected] http://lists.lists.reflextor.com/cgi-bin/mailman/listinfo/a51
