Continuous Data Protection
Continuous data protection
A recent innovation, continuous data protection (CDP), fills this data protection gap. CDP technology automatically captures transaction and object changes that occur between tape saves. It then saves that data on disk-based storage devices.
The CDP software also makes it easy to use these saved updates to quickly recover data to any point in time. Another advantage of CDP technology is that, unlike tape backups, it does not require the interruption of applications to perform backups.
With CDP in place, if an important document is accidentally deleted or data is corrupted, it can be restored to its state immediately prior to when the problem occurred. A click of a button initiates the CDP recovery function and individual data items are then typically restored within seconds.
CDP also reduces recovery times when restoring large quantities of data because, unlike other data recovery options, there is no need to rebuild and resynchronize volumes and then apply journal or other archive logs to bring the data forward to the desired point.
Compared to other options, the reduction in recovery times can be dramatic. For example, CDP can typically recover one terabyte of data in about 20 minutes. It would take about three hours to recover the same amount of data from a local disk-based copy, nine hours from a remote disk-based copy and 17 hours from a tape-based backup. CDP is available as standalone software or may be integrated into a complete HA solution.