Hi Techies,
I have performed Migration using Oracle Golden Gate. Please find the High level Steps.
Would be sharing the detailed Documentation.
Advantages of Oracle Golden Gate is there no down time for the source system. only down time is during the switch over.
- Initialize the Oracle Advanced Customer Service (ACS) for SAP O2O (Oracle to Oracle) package which includes all functionality to create a complete set of migration scripts including a new source user creation, target database and related tablespace creation, and the OGG source and target configurations.
- Install the Oracle GoldenGate software on source and target
- Run the O2O package on the source system 4. Start GoldenGate change data extract and pump processes on the source system, which will being capturing and queuing change data and DDL (as needed).
Note: All tables in the SAPR3 schema will be included and will contain a SCN/CSN token so that later each table can be filtered by SCN/CSN. A code snippet to add such as token is:\
Table SAPR3.*, Tokens (tk-csn = @GETENV ("TRANSACTION", "CSN"));
- Start the initial database load to copy the database objects from the source to target database.
- Validate initial database load.
- Start GoldenGate replicat apply processes on the target system, which will be applying captured change data and DDL (as needed). Note: While the replicat process(es) will be started using the AFTERCSN option, tables within a single replicat will be configured to skip transactions based on the table grouping of the initial loads. This automatically configured by the O2O scripts. Transaction filter by table will be done with something similar to the following code snippet:\
Map SAPR3.MYTABLE, Target SAPR3.MYTABLE, Filter ( @NUMSTR (@TOKEN ("TK-CSN")) > 1234567);
- Switch over. Once both system are in sync the source SAP system may be stopped. After the last changes is applied to the target the SAP system can be started
- on the target system. The source SAP shutdown and target SAP startup will typically take approximately 10 minutes regardless of the system size.
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Sandeep Singh