Considerations: When a Site Needs to be Split Over Two or More Domains
It's the weekend. Hope everyone is having a relaxing time. 
Anyway, what do you think?
I have wondered about this for, literally, years.
A business can go either way: become like Walmart and sell everything and keep selling increasing numbers of categories of goods, or break up into sub-brands, each with their own website and URL.
Each direction has its benefits and costs.
So, let's say we want to 301 some existing pages to a new domain, and keep the rest on the original domain....
Has anyone done this successfully with sites ranking in SERPs? How does Goog respond?
How is it treated, afterwards?
(I intend on keeping the link structure intact, except it will be across two domains, as fitting for the various existing pages, already separated on the existing single site semantically by sub-domain..)