Oracle Architecture

Oracle architecture -let's discuss about basics of oracle architecture
                                 Oracle architecture divides into mainly 3 parts
                                               1.Memory
                                               2.Process
                                               3.Storage
Components of Memory : SGA - It contains -1. Shared pool
                                                                         2.Database buffer cache
                                                                         3.Redolog buffer cache
                                                                         4.Java pool
                                                                         5.Large pool
                                                                         6.Stream pool 
Background Process :  It contains                   1.SMON
                                                                         2.PMON
                                                                         3.DBWR
                                                                         4.LGWR
                                                                         5.Arcn.
Storage: There are tow types of storages physical and logical
               Physical Storage :Contains Control file,Data file & Redo file
               Logical Storage : Contains Table spaces and data files.

                                                               

RMAN Utility in Oracle

RMAN backup is another ways to take backup of oracle database. It is easiest
way to take oracle database backup. We can also recover Oracle database through
RMAN backup utility.RMAN backup is utility that Oracle database has by default
in it.Mostly RMAN backup utility in Oracle used for backup  & recovery purpose
rather than to do it by command.Oracle RMAN utility suggest you which file or data
you need  to backup while while taking backup of Oracle database.   

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