How to calculate the size of database (a different one)

Hello Friends,
I am told to move the data from server to another machine (cloning is one very good option, I agree. But I expect a different answer regarding exports and imports). so How should I go about the task. The destination machine has got unlimited space. So thats not a problem. My questions are :
1) How should I start the task ( I generally go for studying the structures and their sizes. Is it ok ?)
2) If I am using Unix machine and there is a limitation that my server will not support file sizes of more than 2 GB, What should I do ?
3) Shall I have to go for a full database backup or fragment the task ? If I do that , there are many schemas, so it will become tedious. But full backup will exceed OS size limitation. What should be done ?
4) Is there anyway, I can go through a dump file, to find out, the database objects present inside that and note the related dependencies.
Please respond.
Regards,
Ravi Duvvuri

1) They are Unix machines. So will the size problem occur(if there is a limitation). How to overcome that?
If the OS are of the same version you will have any problem. Regarding the storage only you have to have space in disk to store the datafiles, redo logs and controlfiles and nothing else.
2) I am trying Export/import measure. Though there are other good methods, I just want to explore the full capabilities of Exp/Imp
r.- Recreate the controlfiles is more effective and fast if the OS are of the same version.
3) And the oracle version is 9i 2. (If I have to perform this on 8i (both source and destination, will the methods are going to differ ?)).
R.- The method is the same for 8i/9i/10g.
How should I go about doing this export/import ?
r.- To use this method you have to have the original database started.
To recreate the controlfile without having the datafile that you mentioned you have to get out it from the CREATE CONTROLFILE sentence and that's it.
For Example: I mean, if your database has 8 datafiles and you have only 7, you have to include only 7 in the CREATE CONTROLFILE sentence.
Joel Pérez
http://otn.oracle.com/experts

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