Editor's note: This is the first installment of a four-part series that will examine the technology and implementation strategies deployed in data de-duplication solutions:
The original products for the data de-duplication market were based on specific systems that focused on improving the value of disk-to-disk backup solutions while providing organizations the ability to minimize their reliance on tape.
As data de-duplication solutions have become more prevalent, a few primary storage suppliers have attempted to implement the technology as an add-on feature, most notably in their VTLs. Backup software vendors are also adding the capability to their solutions. With so many data de-duplication options available to the IT manager today, the new question is, Where is the best place to host the data de-duplication process?
As you are reading, keep in mind that the primary focus of data de-duplication is secondary storage -- archive and backup, as opposed to primary storage. Also note that what constitutes duplicate data may not be immediately obvious. An Oracle database, for example, can be backed up in several ways -- using the built-in RMAN utility; using an organizations enterprise backup software application; or using an Oracle-specific backup utility. Each of these methods creates its own data set. Since those data sets are backups of the same Oracle database, the data within each set is essentially identical.
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