Hybris DAta Hub Architecture

Hello experts, I am brand new to hybris data hub and I have several questions.

• Data Hub installation is separated from ecommerce solution or they come together? Where can I find installation guides for Data Hub and if there are architecture examples, for instance: same machine for ecommerce and datahub, separate machines,....

• Does datahub have a system to manage sources? How does it manage different source versions?

• Does we need 3 datahub systems: DEvelepment, Quality and Production?

• Does Datahub have a database o it uses ecommerce database?

• How much cost has (time, effort) a change on an idoc or in ecommerce master data tables, in Data Hub?

• Where can i find technical documentation for integration Dathub with SAP PI/PO?

Many Thanks

io