Requirements for upgrading the oracle 9i DB to 11g

Hi,

I want to upgrade my database to 11g from 9i.
But I need to list out a set of requirements for upgrading the DB to 11g (like the space, server capactiy….etc).

Could you please suggest me some book or link to achive this knowledge correctly.

Thanks in Advance,

here it is ...

http://download.oracle.com/docs/cd/E...e10819/toc.htm

Thanks,

Thank you so much.