What is Data deduplication ?
Data deduplication is a technique for reducing the amount of storage space an organization needs to save its data.
In its simplest form, deduplication takes place on the file level; that is, it eliminates duplicate copies of the same file.
This kind of deduplication is sometimes called file-level deduplication or single instance storage (SIS). Deduplication can also take place on the block level, eliminating duplicated blocks of data that occur in non-identical files. Block-level deduplication frees up more space than SIS, and a particular type known as variable block or variable length deduplication has become very popular.
Often the phrase "data deduplication" is used as a synonym for block-level or variable length deduplication.
Data deduplication is a technique for reducing the amount of storage space an organization needs to save its data.
In its simplest form, deduplication takes place on the file level; that is, it eliminates duplicate copies of the same file.
This kind of deduplication is sometimes called file-level deduplication or single instance storage (SIS). Deduplication can also take place on the block level, eliminating duplicated blocks of data that occur in non-identical files. Block-level deduplication frees up more space than SIS, and a particular type known as variable block or variable length deduplication has become very popular.
Often the phrase "data deduplication" is used as a synonym for block-level or variable length deduplication.
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