Data Deduplication


Data deduplication is a method used to eliminate data files with repeating data in a system to minimize the space used up by such files. In organizations, systems of storage contain duplicates of data sets in that a file may be saved in different locations but contain similar data thereby being allocated space in both locations. Deduplication therefore identifies such files and saves a single copy of the data and replacing the other formats with pointers in the system. The significant use of deduplication is mostly to free up storage in primary storage, facilitate backup and also aid in disaster recovery processes.


Used in Backup Applications

Data Deduplication is extensively used in backup applications and exists in two ways including source and target deduplication. Both methods help a company to back up their data as they progress with their day to day processes automatically. The methods are facilitated either by WAN connections or over a cloud server whereby the intended data is scanned for any changes since the last backup and the new variations updated to the previous versions. Organizations with larger data sets can as well use the target deduplication method that facilitates the transfer of unlimited data between the client and the server. The intention of the backups is to generally avail new storage space for the running systems.


Used to minimize the amount of used disk space.

Deduplication is an efficient method to identify duplicate files and relocated them by use of pointers. Once the data files are attached to pointers, the space they occupy is cleared thereby leaving new usable disk space. This ability helps save the money an organization needs to use to buy additional space because it reallocates a substantial amount of data files. However, the amount of data that can be relocated depends on the type of data and whether the organization has file sharing options with other organizations. Not only does deduplication create new space, but it also helps to minimize data redundancies in the system.


Network data deduplication

This type of deduplication is used to minimize the number of bytes required to be transferred over a network with endpoints which reduces the bandwidth required. With reduces bytes usage, deduplication helps to make network transfer of data more efficient and faster because fewer bytes are used during the transfer of files. Also, costs for network sharing are minimized due to low byte usage.


Used to improve backing up of files in virtual environments

In virtual servers and virtual desktops, deduplication facilitates the ability to separately duplicate files and whenever one serve edits data, the other virtual server’s version of the data remains the same. In this practice, each of the virtual machine’s files are concatenated together to form a single independent storage space. This implies that the process of backing up and duplicating data files in the virtual systems is made efficient and more accurate which are capabilities that hard links and shared disks do not have.


Used to identify duplicate files

Through post deduplication, files can be analyzed for duplication after being stored which is a process that helps avoid degradation of storage processes. This capability helps users retrieve data files based on their type and location because after deduplication, the files are stored in a systematic manner according to their types and a clear directory path indicated. Alternatively, deduplication can be achieved during the storage process of data files whereby files are scrutinized as they enter the target drive to ensure that none of the data is a duplicate. This is advantageous because duplicate data is never stored thereby effectively saving on space and time needed to go through files checking for duplicates



Data deduplication is a practice organization and individuals should embrace because of its splendid benefits especially when storage space is concerned. The fact that it helps either avoid storage of duplicate files or in their elimination means that each space available on any system will be used specifically for its intended reason without any wastage. Moreover, deduplication goes hand in hand with backups which helps store data in a safer location where it can be retrieved in case the original data is compromised or in the instance of reference.