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Oracle10g Grid Computing with RAC
Chapter 17 -
Oracle’s Grid Integration Technologies

The Master Table

Name                                      Null?    Type
 ----------------------------------------- -------- --------
 DEGREE                                             NUMBER
 LANGUAGE                                           VARCHAR2(30)
 PLATFORM                                           VARCHAR2(100)
 ABORT_STEP                                         NUMBER
 INSTANCE                                           VARCHAR2(16)

As you can see, the Master Table is used to track the detailed progress information of a Data Pump job:

  • The current set of dump files.

  • The current state of every object exported or imported and their locations in the dump file set.

  • The job’s user-supplied parameters.

  • The status of every worker process.

  • The state of current job status and restart information.

The Master Table is created in the schema of the current user running the Pump Dump export or import, and it keeps tracks of lots of detailed information.  Therefore, this table can take up a significant amount of storage space. (Tip: If you are running an export or an import job on a database with a large number of database objects, make sure the schema user has sufficient tablespace quota.)

The Master Table is the key to Data Pump’s restart capability in the event of a planned or unplanned job stoppage.

Process Architecture

Data Pump has many processes through which the entire data load and unload methodology is conducted. Figure 17.2 shows all components and their inter relation. They are discussed as follows:

For more information, see the book Oracle 11g Grid and Real Application Clusters 30% off if you buy it directly from Rampant TechPress . 

Written by top Oracle experts, this RAC book has a complete online code depot with ready to use RAC scripts.

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