continuous data protection (security) (CDP)
Continuous Data Protection(CDP) is a backup and restore data storage technique that continuously tracks and records only the changes in data. It is not a replacement for backups. With the CDP technique, each data transaction is backed up and time-mapped. By calling up the original data and the stored modifications, it is possible to reproduce data states from any point in time.
CDP recording can be block and file oriented and has appropriate selection criteria to reconstruct the required data sets from the variety of data. Continuous Data Protection is considered Backup to Disk or Disk to Disk( D2D), and serves as intermediate storage before archiving.
The Storage Networking Industry Association( SNIA), the storage networking standards body, defines CDP technology as follows: "Continuous Data Protection is a method that continuously captures or tracks data modifications and stores changes independently of the primary data, allowing recovery points for any point in the past. CDP systems can be based on block storage, file storage, or application storage and provide recoverable objects for infinitely variable recovery points." In addition to continuous data protection (CDP), there is also near-continuous data protection (near CDP). In this method, snapshots are created at specified time intervals.