Oracle deleting archived logs and adding scheduled tasks

Catalog

One 、 Delete archive log

1. Switching users

2. Use RMAN Tools

3. Connect to local database

4. Check the difference between the control file and the actual physical file

5. Check the information of the control file and the actual physical file synchronously

6. Delete n Archive logs from days ago

7. sign out RMAN

Two 、 Add timing task

1. Create archive log delete script

2. Grant script file execution permission

3. Test the archive log deletion script

4. Add timing task

5. View scheduled tasks

summary

One 、 Delete archive log 1. Switching users # Switch to oracle user su – oracle2. Use RMAN Tools # Use RMAN Tools , Delete invalid archive logs rman

notes ：RMAN（Recovery Manager） Is a method for backup (backup)、 Restore (restore) And recovery (recover) Database Oracle Tools .

3. Connect to local database # Use target Command to connect to the local database RMAN> connect target /4. Check the difference between the control file and the actual physical file

perform crosscheck command , Check the difference between the control file and the actual physical file , If the physical file does not exist on the media , Mark as expired（ invalid / Unavailable ）,crosscheck after , You can delete these invalid archive logs ( After executing the script , The deleted archive log status will change to “ invalid ”)

RMAN> crosscheck archivelog all;5. Check the information of the control file and the actual physical file synchronously # Delete status is expired（ invalid / Unavailable ） The archive log of RMAN> delete expired archivelog all;6. Delete n Archive logs from days ago # Delete 3 Archive logs from days ago ：RMAN> delete archivelog all completed before 'sysdate-3';# Delete 1 Days ago, RMAN> delete archivelog until time 'sysdate-1'

difference ： The first strip complete The sentence of , The main task is to delete the archive that has been backed up , Archive without backup , It won't be deleted . And the second statement , The archive will be deleted , Whether backed up or not .

7. sign out RMAN# sign out RMANRMAN> exit Two 、 Add timing task 1. Create archive log delete script

archivelog_clear.sh

#!/bin/bashBACK_DIR=/home/oracle/clear_archlog/dataexport DATE=`date +%F`mkdir -p $BACK_DIR/$DATEtouch $BACK_DIR/$DATE/rman_backup.logecho "--------------------------------`date`-------------------------------"source ~/.bash_profile # Log rman_backup.log You can check whether the execution is successful later rman target / >> $BACK_DIR/$DATE/rman_backup.log <<EOF # Put the invalid expired Of archivelog Mark it out crosscheck archivelog all;# Delete all expired archive logs directly #delete noprompt expired archivelog all;# Delete directly 7 All archived logs days ago delete noprompt archivelog all completed before 'sysdate-7';exitEOFecho -e "\n"echo "------------------------------ FINISHED ----------------------------"2. Grant script file execution permission # Grant Execution Authority chmod +x archivelog_clear.sh3. Test the archive log deletion script ./archivelog_clear.sh4. Add timing task

Enter the command ：crontab -e Edit and add a new line of tasks

30 3 15 * * /home/oracle/archivelog_clear.sh5. View scheduled tasks crontab -l summary

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