A while back, Thomas Kejser (@thomaskejser | http://blog.kejser.org/) and I had written a couple cool guides on Analysis Services Multidimensional:
To make it easier to consume, Technet has created a new series of E-books which can be found in the E-Book Gallery for Microsoft Technologies. Included in the first series of eBooks, you can find the combined Performance and Operations Guides in the links below.
Download this book to learn about Analysis Services Multidimensional performance tuning from an operational and development perspective. This book consolidates the previously published SQL Server 2008 R2 Analysis Services Operations Guide and SQL Server 2008 R2 Analysis Services Performance Guide into a single publication that you can view on portable devices.
Applies to: SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012
Source: White paper
E-book publication date: May 2012