How to make HOT backup, Oracle

A hot backup, or one taken while the database is active, can only give a read-consistent copy but doesn’t handle active transactions. You must ensure that all redo logs archived during the backup process are also backed up.

Limitations on hot or on-line backups:
􀂃 The database must be operating in ARCHIVELOG mode for hot backups to work.
􀂃 Hot backups should only be done during off or low-use periods.

The hot backup consists of three processes:
1. The tablespace data files are backed up.
Make a script. Select all the talespaces, make 'alter tablespace tablespace_name begin backup'. Copy the corresponding datafiles. then 'alter tablespace tablespace_name end backup'.
2. The archived redo logs are backed up.
select the member from v$logfile and copy them.
Then 'alter system switch logfile;'.
archive log all;
see the archive destination from v$parameters. copy the files.
3. The control file is backed up.
alter database backup control file to /tape1/ora_conbackup.bac;