ExaGrid's Two-Tier Architecture Tackles the Backup Storage Tradeoff
Most backup storage systems make you choose between fast backups and efficient storage. Inline deduplication appliances save space but slow down your backup window. Standard disk storage keeps backups fast but costs more for long-term retention.
ExaGrid built something different. The company's tiered approach uses a Landing Zone for fast ingest and a separate Repository Tier for deduplicated long-term storage. This architecture handles both requirements without compromise.
I learned about this during the 64th IT Press Tour in New York.
How the Architecture Works
The Landing Zone acts as a high-speed cache. When backup data arrives, it writes directly to disk at full speed. No deduplication happens inline, so there's no processing overhead slowing down the backup window.
Behind the scenes, ExaGrid's adaptive deduplication runs in parallel. It compares incoming data to previous backups and moves only unique blocks to the Repository Tier. The Landing Zone keeps the most recent full backup readily available for instant restores.
This matters because inline deduplication creates two problems. First, it becomes a bottleneck during backups when you need maximum throughput. Second, it forces rehydration during restores when you need data quickly. ExaGrid avoids both issues.
The company claims backup performance twice as fast as Pure Storage's all-SSD arrays. That's because Pure doesn't optimize for large sequential backup jobs the way ExaGrid does.
Scale-Out Architecture
ExaGrid uses true scale-out rather than scale-up. Each appliance contains its own CPU, memory, network interfaces, and storage. When you add capacity, you add complete appliances rather than shelves to a controller.
The difference shows up in backup windows. Traditional deduplication appliances use a front-end controller that becomes saturated as you add storage. The backup window expands over time. With ExaGrid, each appliance handles its own deduplication, so throughput scales linearly.
A single system can scale to 32 appliances, handling 2.7 petabytes of full backup data before deduplication. Systems support up to 6 petabytes in environments using tools like Veeam SOBR or NetBackup disk pools.
Deep Backup Integration
ExaGrid supports 25 backup applications including Veeam, Commvault, Veritas NetBackup, and Rubrik. But support goes beyond basic compatibility.
For Veeam, ExaGrid integrates with the data mover protocol for 30% faster ingest. It supports Veeam Fast Clone for synthetic fulls that run 30 times faster. The appliances work as SOBR repositories with automated job management.
With Commvault, ExaGrid can deduplicate data that Commvault already deduplicated, achieving an additional 3:1 reduction. It supports both Commvault and ExaGrid replication for DR flexibility.
NetBackup integration includes nine certified features: OST, accelerator, optimized duplication, auto image replication, instant recovery, granular recovery, analytics integration, and single target storage pools.
For Oracle RMAN, ExaGrid supports channel-based backups with automatic failover if an appliance goes offline.
Ransomware Protection
The Repository Tier isn't connected to the network. Only ExaGrid's code can access it. This creates an air gap that threat actors can't reach through network protocols.
When a ransomware attack sends delete commands, ExaGrid removes data from the Landing Zone but not from the Repository. The system implements delayed deletes with configurable retention periods.
ExaGrid added AI-powered detection in its latest release. The system learns normal deletion patterns over time. When deletion activity falls outside established patterns, it alerts administrators and automatically extends the retention time lock. Both IT and security officers must clear the alert before deletion resumes.
SSD Appliances Coming
ExaGrid plans to ship an all-SSD appliance line in December 2025. The company spent years rewriting code to eliminate bottlenecks that show up with faster storage.
The SSD version uses TLC rather than QLC flash. TLC costs 15% more but lasts longer. In backup environments with constant writes and deletions, QLC wears out too quickly. ExaGrid's math shows TLC provides better total cost of ownership.
The SSD appliances reduce the Landing Zone to 20% of total capacity, since deduplication can process data fast enough to move it to the Repository quickly.
Practical Considerations
ExaGrid ships appliances customers can install themselves in 30 minutes to three hours with phone support. Hardware replacements ship next business day and customers can swap components themselves.
Support uses assigned level 2 engineers rather than tier 1 gatekeepers. Each engineer handles a specific group of customers. When you call, you get the same person who knows your environment.
Backup storage typically runs six to nine years in production. ExaGrid has no planned obsolescence or forced upgrades. The architecture allows mixed appliance models in the same system as you scale.
For organizations running Veeam, Commvault, NetBackup, or Rubrik with 50TB or more of backup data, ExaGrid's architecture solves real engineering problems. The tiered approach delivers both fast backup windows and efficient long-term storage without forcing tradeoffs.