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Concept of Master instance, Owner instance, and PastImage in Oracle10g/11gRAC Database

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Step 2 of the experiment: Then run selectcount (*) fromt04209_uname; selectsum (uvalue) fromt04209_uname; selectavg (uvalue) fromt04209_uname; selectmax (uvalue) on instance 1.

Step 2 of the experiment: Then run selectcount (*) fromt04209_uname; selectsum (uvalue) fromt04209_uname; selectavg (uvalue) fromt04209_uname; selectmax (uvalue) on instance 1.





Master128Remaster (caused by ObjectAffinity and Dynamic Remastering) or manual Remaster (oradebug command), the entire object will be used as a master unit without multiple instances distributed segmentation master: No matter how big the table is, its data blocks are all owned by the same instance master. In addition, the entire undo segment must be the same instance master at any time.


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