Guest Column | May 27, 2015

Get Answers For System Sizing Of Backup Storage With Data Deduplication

By Bill Andrews, CEO, ExaGrid Systems

Data deduplication compares each backup to previous backups and only stores the bytes or blocks that change. Employing data deduplication with backup storage greatly reduces the amount of disk storage required and also saves on WAN bandwidth as only the changes are stored, and only changes traverse the WAN to the offsite/disaster recovery site.

Sizing how much disk-based backup with data deduplication storage is required is not easy and requires a lot of information to ensure that the system is sized correctly or you could be faced with having to buy more capacity in 6 to 12 months.

The following factors all play into properly sizing backup storage with data deduplication. Sizing backup storage with deduplication is far more complex than sizing primary storage. Most vendors have a sizing calculator to help you size properly. Be careful regarding an industry-old practice of under sizing to lower the entry price. Within 6 to 12 months, you may discover that your backup storage is undersized, and there is nothing you can do except to buy more. Disk-based backup storage system sizing is important to the success of the implementation and also protects budgets up front and over time.

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