Is iterationCount: 3000 enough for everyone

[Wakan Tanka]

Hello NuPIC,

I've been discussing with Matt on gitter a while ago 
https://gitter.im/numenta/public/archives/2015/08/19
about size of "iterationCount" parameter. My original problem was that 
the swarming get stucked when I used "iterationCount": -1 on huge data 
set (249459 lines). Matt said that everything that is over 3000 is 
waste. So setting "iterationCount": 3000 solved my problems. But there 
are two questions that comes to my mind:

1. What does the "iterationCount" exactly mean? Is it how much rows 
(from the beginning of file) will be involved in swarming process or how 
many times will swarm iterate over the input until it finds best model?

2. If it means the number of lines that are involved in swarm process 
isn't setting a fix number (everything instead of -1 problem)? I mean 
what if I have large data which nature might change after 3000th row, 
will be swarming able to handle this?

Thank you