Tablespace Growth History and Forecast for 10g and 11g

Finding space usage of tablespaces and database is what many DBAs want to find. In this article I will explain how to find out space usage history and forecasting future growth of tablespaces. For 10g and 11g database growth history and forecast see script Database Growth History and Forecast for 10g and 11g.
For 12c and above; Tablespace and Database growth history and forecast, please use following scripts
Tablespace Growth History and Forecast for 12c and Above.
Database Growth History and Forecast for 12c and Above.

Error "[NS-20802] Grid Infrastructure Configuration Failed" During 11.2 RAC installation on Windows 2008R2

I faced error "[NS-20802] Grid Infrastructure Configuration Failed" during a 2 node Oracle 11.2 RAC installation on Windows 2008 R2 (64 bit). All prerequisites were checked and cluvfy also did not show any problem, but during installation,