Upgrade Oracle 9i to 11g on different platform

[dbadude]

Hi,

Our company is going to change hardware and server. Due to this reason, I need to upgrade our production database of Oracle 9i to Oracle 11g from HP UX to RedHat Linux. Is there any guideline or documentation available to upgrade Oracle 9i to 11g with platform change? Kindly provide me suggestion.

Present Oracle database running on Oracle 9.2.0.4 on HP UX
Want to upgrade Oracle 11.2. on RedHat Linux.

Thanks

[Ahmed]

What is the size of database? Because if you need to change platform too in upgrade then you can perform this task using export/expdp. But why are going from Unix to Intel platform?