Help me, Migrate 10.1 to 10.2 plan

Question

I'll have migrate plan from 10.1. to 10.2. on data 70G.
Old System >
OS: Redhat 3 x86_64
Oracle Version: 10.1.0.5
File Type: Ocfs version 1
New System >
OS: Redhat 4 x86_64
Oracle Version: 10.2.0.2
File Type: ASM 2
I think use export and import.
Please introduce me for migrate solution.
1 . use little time.
2. migrante data complete
3. if i use export, import (and i use export dump, import dump), What I concern?
help me .

Answer 1

IF the Endian of your source and destination databases is the same:
Maybe you could pre-create a new, empty, 10.2 database on the destination host.
Create very small Tablespaces with SAME NAMES as source.
Create profiles & roles.
Create all Non-DBA user accounts (with permissions,passwords & quota's as required).
Delete the small tablespaces.
Use TRANSPORT TABLESPACE methodology to copy tablespaces from source DB to destination DB.( Can this step be done in 2 hours?)
Using an EXPORT from source DB of all Non-DBA schema's (rows=NO) , do an Import to destination DB(rows=no,indexes=no) to setup appropriate grants of tables/views/roles to subordinate users and roles.
(This should be a quick import as no rows are being loaded or indexes created.These will already be present from the Transported tablespace metadata import.)
If all is well on the new host, update DNS application alias, with IP of new host.
Assumption:
a) 2 hosts are involved ( you don't expect to update the OS in the same 2 hours do you?)
b) DNS aliases are used for applications, and 'host=' uses these DNS aliases in the client PC's tnsnames.ora files.