Rman archive logs deltion question..

Question

Hi All,
What's the best way to delete archive logs that have been backed up by RMAN? Is there a preferred way? We are looking at the 2 scripts below:
run {                                                                                    
allocate channel c1 type disk ;  
sql 'alter system archive log current'; 
crosscheck archivelog all; 
backup AS COMPRESSED BACKUPSET incremental level 1 tag LEVEL1_Wed filesperset 1 database include current controlfile *ARCHIVELOG ALL*; 
sql 'ALTER DATABASE BACKUP CONTROLFILE TO TRACE';
crosscheck backup of database; 
crosscheck backup of controlfile;  
delete noprompt force obsolete;     
delete noprompt force expired archivelog all; 
*delete archivelog until time 'sysdate-3';*   
delete noprompt force expired backup of database;                                       
delete noprompt force expired backup of controlfile;                                    
release channel c1;                                 
}The above script will back up all archive logs and then it will delete anything that is more than 3 days old. Or, would it better to use the following format:
run {                                                                                    
allocate channel c1 type disk ;  
sql 'alter system archive log current';                                               
crosscheck archivelog all;                                                           
backup AS COMPRESSED BACKUPSET incremental level 1 tag LEVEL1_Wed filesperset 1 database include current controlfile *ARCHIVELOG until time 'sysdate-3' DELETE INPUT*; 
sql 'ALTER DATABASE BACKUP CONTROLFILE TO TRACE';                                       
crosscheck backup of database;                                                          
crosscheck backup of controlfile;                                                       
delete noprompt force obsolete;                                                         
delete noprompt force expired archivelog all;                       
delete noprompt force expired backup of database;                                       
delete noprompt force expired backup of controlfile;                                    
release channel c1;                                 
}Can someone please shed some light on this.
P.S. Sorry can't get the required text to show in bold to highlight the differences in the 2 scripts. Please look for the text between the **.
Thanks and Regards
Edited by: rsar001 on Nov 25, 2010 7:45 AM
Edited by: rsar001 on Nov 25, 2010 7:46 AM

Answer 1

So the best way would be to setup the archive retention as mentioned above:
>
CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 1 TIMES TO DISK;
>
Also change the code to the following:
run {                                                                                    
allocate channel c1 type disk ;  
sql 'alter system archive log current'; 
crosscheck archivelog all; 
backup AS COMPRESSED BACKUPSET incremental level 1 tag LEVEL1_Wed filesperset 1 database include current controlfile ARCHIVELOG ALL; 
sql 'ALTER DATABASE BACKUP CONTROLFILE TO TRACE';
crosscheck backup of database; 
crosscheck backup of controlfile;  
delete noprompt force obsolete;     
delete noprompt force expired archivelog all;     
delete noprompt force expired backup of database;                                       
delete noprompt force expired backup of controlfile;                                    
release channel c1;                                 
}Would the above suffice? or do we still need to make further adjustments?
Thanks in advance for all your help.
Thanks
Edited by: rsar001 on Nov 25, 2010 10:26 AM