Hello. I'm new to Houdini and I'm doing this tutorial.

Pixelfront tut [pixelfront.net]

At the point of caching the final sim the guy splits the grains into two parts to be able to sim on his machine, he says. But he doesn't show how to do it.

I have 128gb memory but the sim crashes when I try caching it in one. Approx. 10 mio particles.

Is this normal? and is it possible to split (clip node?) into two parts?

Im doing this sometimes yes.

You are not going to get particle<>particle interaction at the border, but often this is ok if you break up the border edge and place it smart in relation to camera.

Any node that devides your geo, clip, split,cluster points, etc etc.

1. You can build several emitters and a switch. Manually run the sims after eachother, swith emitter and change cache name.
2. Or you can go advanced and build a wedging system that will autorun your sims with different emitters.