• Continuous Data Protection (CDP) – automatically saves a copy of every change made to data, essentially capturing every version of the data that the user saves.
– It allows the user or administrator to restore data to any point in time.
• CDP is different to a typical backup
– you don't have to specify the Point-in-Time to which you would like to recover until you are ready to perform a restore.
CDP is a service that captures changes to data to a separate storage location. • solutions can provide fine granularities of restorable objects ranging from crash-consistent images to logical objects such as files, mail boxes, messages, and database files and logs.
Differences from a typical backup • Traditional backups can only restore data to the point at which the backup was taken.
• With continuous data protection, there are no backup schedules. When data is written to disk, it is also asynchronously written to a second location, usually another computer over the network. This introduces some overhead to disk-write operations but eliminates the need for scheduled backups.