What to do if there is abrupt termination of RMAN during a backup session

Question

Hi All,
I am trying to automate the Level 0 and Level 1 backups which we ought to take. Following the is the RMAN related part of it for L1 backup:
CONFIGURE CONTROLFILE AUTOBACKUP ON;"
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '${BKP_LOCATION}/${LType}_%F';"
run {"
allocate channel c1 type disk;"
backup"
incremental level 1 cumulative tag = $BTAG"
format '${BKP_LOCATION}/${LType}_%d_set%s_piece%p_%T_%U.bkp'"
(database include current controlfile tag $CTAG) ;"
sql 'alter system archive log current';"
sql 'alter system archive log current';"
backup archivelog from sequence ${CSEQ} tag $ATAG"
format '${BKP_LOCATION}/${LType}_Arch_%d_set%s_piece%p_%T_%U.bkp';"
release channel c1;"
exit;"
In the above snippet, the variables are substituted for within a shell script and then put into a command file for RMAN. I am a novice in the backup and recovery. I got above piece of code from someone working on RMAN and built my automation logic around it.
The script works fine and I am trying to build to script level recovery feature around it. My question is:
-- What happens if I invoke the script, the backup session starts and then there is abrupt termination of the RMAN session either because of losing the db connection or receiving an interrupt signal or a kill signal or some other weird reason.
-- What if I re-invoke my script? Will it start from the point where it was stopped earlier or would it start from the point where we had last successful Level 1 backup completed?
Thanks in Advance.

Answer 1

Hi user781131,
What happens if I invoke the script, the backup session starts and then there is abrupt termination of the RMAN session either because of losing the db
connection or receiving an interrupt signal or a kill signal or some other weird reason?The backup set which rman was creating is not commited due to the abnormal termination but all succesfull backup sets can be used.
What if I re-invoke my script? Will it start from the point where it was stopped earlier or would it start from the point where we had last successful Level 1 backup
completed?In your backup script you do not use the < NOT BACKED UP SINCE TIME > clause so it will again do a level 1 backup off all datafiles.
See:
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14194/rcmsynta009.htm#i1017236
This option is a convenient way to back up files that were not backed up during a previous failed backup. For example, you back up the database, but the instance fails halfway through. You can restart the backup with the NOT BACKED UP SINCE TIME clause and avoid backing up those files that you already backed up. If AS BACKUPSET is set, then this feature is only useful if RMAN generates multiple backup sets during the backup.
Regards,
Tycho
Edited by: tychos on 28-jan-2010 15:21