Operating System Consistent Backup (Archive Mode)

Hi
In archive log mode, after putting a tablespace in backup mode one by one as follows:
Alter tablespace tablespace_Name begin backup;
If I create backup using operating system commands one by one for all tablespaces. Will this backup consider as consistent? Will it require archive logs to keep it consistent?
Wishes
Jawad

hi,
Your hot backups consider to be consistent only,when you have all the archivelogs sice you made the hot backup.when you put tablespace in backup mode, then the dbfile header freezes at the point you fire 'alter tablespace <name> begin backup' ;
on the other hand the rest of the files have diff scn's.this is the reason it does not consider to be a consistent backups.that dosent mean you should not take hot backups,insted oracle recommend to operate your db in archivelog mode specially if it is prod db.
hare krishna
Alok

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