We have an application running all the time and we are affordable to have very minimal downtime for backup. During downtime we have to take a back up of the application's database related files. It's not RDBMS, a kind of flat file database.
The directory size is 18 GB. The application is running on SunOS. We use tar and compress commands to archive. But this takes around 30 mins. We want to minimise the time it takes for archiving. Is there any other efficient way to archive and time saving methods.