what does domainChange command do to parallel a model and when that is required?

[MikeITExpert]

I am trying to make use of OpenSeesMP to speed up my analysis. I have been studying the below link

https://opensees.berkeley.edu/OpenSees/ ... SeesMP.pdf

On page 9 and 10, it describes how to analyze a large model to run in parallel, however, I can't make sense of domainChange command.

Please let me know if there is a more detailed reference on how to make large model analyze in parallel using OpenSeesMP.

Regards