Data reduction Definitions

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  • C

    centralized backup

    Centralized backup is a process that involves automatically replicating data from remote sites and sending it over a network to a main (centralized) location for storage.

  • D

    data archiving

    Data archiving migrates infrequently used data to low-cost, high-capacity archive storage for long-term retention.

  • data deduplication hardware

    Data deduplication hardware is a storage product that eliminates redundant copies of data and retains one instance to be stored. Although these products are sold as appliances or disk libraries, they include software that performs the deduplication.

  • data deduplication ratio

    To calculate the deduplication ratio, divide the capacity of backed up data before dupliates are removed by the actual capacity used once the backup is complete.

  • data reduction

    Data reduction minimizes the amount of data an organization needs to store, usually by eliminating redundant information. The most common data reduction methods are deduplication and compression.

  • G

    global data deduplication

    Global data deduplication is a method of preventing redundant data when backing up data to multiple deduplication devices.

  • I

    inline deduplication

    Inline deduplication is the removal of redundancies from data before or as it is being written to a backup device.

  • N

    near-continuous data protection (near CDP)

    Near-continuous data protection, sometimes called near-continuous protection, is a general term for backup and recovery products that take snapshots at set intervals. The term evolved from a need to differentiate products that take snapshots on a pre-determined schedule (every fifteen minutes, for example) from those products that take snapshots each time new data is written (true CDP).

  • P

    post-processing deduplication (PPD)

    Post-processing deduplication (PPD), also known as asynchronous de-duplication, is the analysis and removal of redundant data after a backup is complete and data has been written to storage.

  • S

    source deduplication

    Source deduplication is the removal of redundancies from data before transmission to the backup target.

  • T

    target deduplication

    Target deduplication is the removal of redundancies from a backup transmission as it passes through an appliance sitting between the source and the backup target.

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