NetBackup 11.0 uses SQLite database to store the MSDP events
NetBackup versions before 11.0 use the file system to store the MSDP events. NetBackup 11.0 and later use SQLite database to store the events. While upgrading to NetBackup 11.0, any unprocessed event files that exist in the directory <catalog_dir>/databases/spa/database/events are migrated to SQLite database at <catalog_dir>/databases/spa/database/events/database directory.
The migration process usually completes in minutes depending on the environment. You can monitor the migration progress in the <catalog_dir>/log/spad/spad.log log file. You can search the log file with the keyword to monitor the migration progress. After the migration completes, a log message is found in the file.