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Title: pools hash rate VS miner hash rate Post by: zhangxiongfei on May 14, 2013, 09:14:12 AM Hi there
I was mining on some popular pools such as btcguild/slush/deepbit. My miners were Icarus FPGA boards with cgminer. why is the hash rate i saw on pool website so different from the hash rate listed by "cgminer-api devs"? thanks xiongfei Title: Re: pools hash rate VS miner hash rate Post by: Chi11ed on May 14, 2013, 10:50:57 AM This is a good question. I also get these differences with my 6990. I get a constant rate of 750mhash, but have seen my online worker rate around 850 at times, then at 650 etc. I guess it averages out but still its weird.
Title: Re: pools hash rate VS miner hash rate Post by: holgerr on May 14, 2013, 11:05:45 AM It's because the pools estimate your hash rate based on submitted shares, while your cgminer has access to the actual hash rate. So if you're lucky and find a lot of shares quickly with your constant hash rate, the pool will think you are hashing faster, while if you're a bit unlucky and don't find as many shares for a while, it will think you're hashing slower. As you said, it all evens out over time. If it doesn't, maybe you're creating a lot of invalid/stale shares.
Title: Re: pools hash rate VS miner hash rate Post by: zhangxiongfei on May 14, 2013, 02:14:00 PM It's because the pools estimate your hash rate based on submitted shares, while your cgminer has access to the actual hash rate. So if you're lucky and find a lot of shares quickly with your constant hash rate, the pool will think you are hashing faster, while if you're a bit unlucky and don't find as many shares for a while, it will think you're hashing slower. As you said, it all evens out over time. If it doesn't, maybe you're creating a lot of invalid/stale shares. Thanks for your explanation. Is it possible to solve this problem ? Is this all about being lucky? Title: Re: pools hash rate VS miner hash rate Post by: heropzy on May 14, 2013, 03:40:24 PM Same question I want to ask.
Title: Re: pools hash rate VS miner hash rate Post by: Pheal on May 14, 2013, 04:27:28 PM It's because the pools estimate your hash rate based on submitted shares, while your cgminer has access to the actual hash rate. So if you're lucky and find a lot of shares quickly with your constant hash rate, the pool will think you are hashing faster, while if you're a bit unlucky and don't find as many shares for a while, it will think you're hashing slower. As you said, it all evens out over time. If it doesn't, maybe you're creating a lot of invalid/stale shares. Thanks for your explanation. Is it possible to solve this problem ? Is this all about being lucky? I think it's to avoid people sending fake hashing speeds. It is always better to estimate it on valid shares since that cannot really be faked. |