Some data deduplication solutions focus on reducing the amount of data ingested (inline) or after it is stored
(post processing) as part of a backup stream to reduce the amount of storage capacity for storing backups. Some virtual tape libraries (VTLs) have implemented some form of data deduplication to reduce the amount of storage capacity to hold backups in addition to traditional data compression and compaction techniques. VTLs with deduplication should be compatible with existing host server backup software. On the other hand, server based software to perform data deduplication would require new software to installed or existing software updated.
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