Oracle RMAN Interview Question:

Explain what is the significance of incarnation and DBID in the RMAN backups?

Submitted by: Administrator

DBID means database id.Incunation means: Database incarnation is effectively a new “version” of the database that happens when you reset the online redo logs using “alter database open resetlogs;”.Database incarnation falls into following category Current, Parent, Ancestor and Siblingi) Current Incarnation: The database incarnation in which the database is currently generating redo.ii) Parent Incarnation: The database incarnation from which the current incarnation branched following an OPEN RESETLOGS operation.iii) Ancestor Incarnation: The parent of the parent incarnation is an ancestor incarnation. Any parent of an ancestor incarnation is also an ancestor incarnation.iv) Sibling Incarnation: Two incarnations that share a common ancestor are sibling incarnations if neither one is an ancestor of the other.
Submitted by: Administrator