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RMAN convert command to migrate Oracle from Big Endian to Little Endian

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QUESTION POSED ON: 29 July 2009
How do you migrate a 2TB Oracle 9i from HP-UX (Big Endian) to 10g on Linux (Little Endian)? Can I use RMAN CONVERT DATAFILE / TABLESPACE ? My downtime window is short so I need the fastest way to to do this migration. Can you give me some tips or guide me through the best way?

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The CONVERT command in RMAN is useful if you will be using Transportable Tablespaces for moving the datafiles. First, on the Linux system, you'll need to create a new database. Then on the HP-UX system, use the RMAN CONVERT command to convert the endianness, similar to the following:

RMAN TARGET /

CONVERT TABLESPACE ts1,ts2 TO PLATFORM 'Linux IA (32-bit)' FORMAT '/tempdir/%U';

Once you have converted the datafiles, FTP them to the destination server (in BINARY mode) and use TTS to plug them in.

Oracle has a document with more details on how to use TTS for this operation. Keep in mind that TTS will not transfer non-segment objects like views, procedures, etc. You will have to recreate those in the destination database.

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