Oracle RMAN Question:

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What are things which play major role in designing the backup strategy?

RMAN Interview Question
RMAN Interview Question

Answer:

Cold backup: shutdown the database and copy the datafiles with the help of
O.S. command. this is simply copying of datafiles just like any other text file
copy.
Holt backup: backup process starts even though database in running. The
process to take a hot backup is
1) sql> alter database begin backup;
2) copy the datafiles.

3) after copying
sql> alter database end backup;
Begin backup clause will generate the timestamp. it'll be used in backup
consistency i.e. when begin backup pressed, it'll generate the timestamp. During
restore, database will restore the data from backup till that timestamp and
remaining backup will be recovered from archive log.

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