5.1 Pre script

1. Notifications and Logging :

   1. Send a notification email or message to inform the administrator that the backup is about to begin.

   2. Record the backup start time and other relevant information in the log file.

2. Prepare the environment :

   1. Clean up temporary files or directories to make room for backups.

   2. Check if there is enough storage space to avoid insufficient storage space during the backup process.

3. Application operation :

   1. Pause or stop related applications or services to ensure data consistency.

   2. Switch the database to read-only mode to prevent data from being modified during the backup process.

4. Database operations :

   1. Perform database snapshots or locking operations to ensure the consistency of backup data.

   2. Start database transactions to ensure data consistency.