The Operations Manager team has made available this long awaited design guide which provides guidance on server sizing, performance and high availability configurations. 

The Design Guide covers the design process from start to finish, and is intended to be read straight through. The guide starts off with a primer of OpsMgr, giving information on the design process and core OpsMgr components and concepts. At the end of this section the reader will have a foundation for indentifying their business, regulatory, and optimization requirements.

Download from here