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Data Domain SISL™ Scaling Architecture

High-Speed Inline Deduplication with Small System Hardware

While tape has been the dominant storage medium for data protection for decades because of its low cost, it is losing ground to deduplication in disk systems. Deduplication is an approach that can deliver an order of magnitude greater data reduction than traditional compression over time.

Data Domain’s SISL (Stream-Informed Segment Layout) technology has many unique advantages:

  • 99% of duplicate data segments are identified in RAM, inline, before storing to disk.
  • Related segments and fingerprints are stored together, so large groups can be read at once.
  • Data Domain can utilize the full capacity of large SATA disks for data protection and, without increasing RAM, minimize the number of disks needed to deliver high throughput.
  • In the long term, SISL allows DD OS-based system performance to track dramatic CPU speed improvements.

In SISL, Data Domain has developed a proven architecture that uses deduplication to achieve high throughput with economical storage hardware. Over time, this will allow the continued scaling of CPUs to add direct benefit to system throughput scalability.

“Data Domain continues to address the scalability demands of large environments. The new DD580 retains the simplicity of Data Domain’s appliances while raising the bar significantly in terms of de-dupe performance. In addition, Data Domain offers the advantage of immediate replication capabilities for DR applications. Enterprise-class customers will want to consider the DD580.”

— Heidi Biggar, Analyst, Enterprise Strategy Group
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