When it comes to backups there are generally two classes col

 When it comes to backups, there are generally two classes: cold and hot.  Cold backups are taken when the system is as \"quiet\" as possible (least amount of system activity is happening). Hot backups, on the other hand, are taken while the system is fully operational and running normally (some systems need to be available \"all of the time\"). Generally, it is important for any backup to represent, or capture, a consistent point-in-time across the entire file system. That is, in the ideal scenario, all files are backed up at the same time. Given that backups generally take a modest amount of time to perform, explain how journaled file systems can be leveraged to create consistent point-in-time hot backups.