On Fri, May 29, 2015 at 7:42 PM, Chun Wang <1240902@gmail.com> wrote:

> Hello. I am from F2Pool. We are currently mining the biggest blocks on
> the network.


Thanks for giving your opinion!



> Bad miners could attack us and the network with artificial
> big blocks.


How?

I ran some simulations, and I could not find a network topology where a big
miner producing big blocks could cause a loss of profit to another miner
(big or small) producing smaller blocks:

http://gavinandresen.ninja/are-bigger-blocks-better-for-bigger-miners

(the 0.3% advantage I DID find was for the situation where EVERYBODY was
producing big blocks).


> We think
> the max block size should be increased, but must be increased
> smoothly, 2 MB first, and then after one or two years 4 MB, then 8 MB,
> and so on. Thanks.


Why 2 MB ?   You said that server bandwidth is much more expensive in
China; what would be the difference in your bandwidth costs between 2MB
blocks and 20MB blocks?


-- 
--
Gavin Andresen