Deduplication is arguably the biggest advancement in backup technology in the last two decades. It is single-handedly responsible for enabling the shift from tape to disk for the bulk of backup data, and its popularity only increases with each passing day. Understanding the different kinds of deduplication, also known as dedupe, is important for any person looking at backup technology.
What is data deduplication?
Dedupe is the identification and elimination of duplicate blocks within a dataset. It is similar to compression, which only identifies redundant blocks in a single file. Deduplication can find redundant blocks of data between files from different directories, different data types, even different servers in different locations.
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