Quote from: PoulGrym on August 18, 2011, 12:14:46 PM

Quote from: PoulGrym on August 17, 2011, 10:40:58 PM

~~Just wanted to tell I tried to change to 100% donation. It only worked with 9.99 >_<~~

Bye guys! might have a look here when PPS .. right now ABC is pretty sweet! less then 0.5 rejected. Inaba you should check what they do to keep it so low. Here i had about 3~4% Rejected shares.

Quote from: Inaba on August 17, 2011, 11:42:54 PM

They modify their getwork server to report less rejects/stales. There's no mystery there. I can do the same here if it'll make you feel better, though. I can, in fact, using their methods, give you 0 rejects.

They have the same reject rate as here, they just don't report it to you, so you will never know if you are having a problem or not and therefore causing a detriment to the pool as a whole.

So I wanted to see what you guys have to say in your defense?

There are definitely pools that do this. Actually, *all* non-PPS pools that purport to be paying for stale shares, actually don't. I do understand the confusion, since it also took Us some time before I realized that pay-for-stales claims can not ever lead to extra earnings at non-PPS pools.

Slush's pool for example has no LP, so it can not possibly notify its workers of a new block. Practically this means those workers do stale work ~3% of the time, although Slush accepts most of these stale shares as valid shares. They therefore report a 0.3% stale rate. Total block reward will be the same 50 BTC in the end, and since everyone has approx. 3% extra shares, payout per user is still the same. Only everyone thinks they get payed for stales.

On the other hand, any PPS pool would shoot itself in the foot if it was reporting a lower stale share amount than was actually the case: It would mean they now also have to pay the promised per share amount for those 'fake valids', whereas normally those would be worthless. The aforementioned dilution effect does not exist at PPS pools, since there is no 50 BTC block reward to be distributed (just the pay per share).

For ABCPool, this goes even further: since we pay as much for stale shares as we do for valid shares, your earnings would be exactly the same if we report 0% stales, 0.5% stales or 100% stales.

For more info, see http://www.abcpool.co/stale-shares.php.

NB: SMPPS, ESMPPS, or other PPS-like reward methods are just as vulnerable to this issue as Prop or PPLNS pools. Even Solo mining has a stale rate, which is reflected in the number of orphan blocks found over time.

NB2: The 'secret' behind real low ~~stale~~ invalid block rates is having a highly connected bitcoind running so you are quickly notified of new blocks, wherever they may come from.