Friday, May 15, 2026

Storage News in VMware Cloud Foundation 9.1

VMware Cloud Foundation 9.1 brings several important storage enhancements, mostly focused on VMware vSAN ESA, storage efficiency, cyber resilience, disaggregated storage, and new object storage capabilities.

From an enterprise architecture point of view, VCF 9.1 continues to transform vSAN from a traditional HCI datastore into a broader software-defined storage platform for private cloud. 

 vSAN Global Deduplication is Generally Available

One of the most important storage changes in VCF 9.1 is the general availability of vSAN Global Deduplication.

Unlike older deduplication models that were more limited in scope, vSAN Global Deduplication is designed for vSAN ESA and works across the cluster. This helps reduce duplicated blocks and improves usable storage efficiency.

The practical benefit is simple: organizations can store more data on the same physical hardware.

Enhanced Compression in vSAN ESA

VCF 9.1 introduces improved compression techniques in vSAN ESA. These enhancements are designed to provide better compression ratios while keeping resource overhead low.

This is especially useful for workloads with compressible data patterns, such as:

  • databases
  • enterprise applications
  • virtual desktop environments
  • large VM estates
  • private cloud platforms with many similar operating system images

Together, global deduplication and enhanced compression improve the economics of vSAN-based private cloud infrastructure.

Better Storage Efficiency and Lower TCO

The combination of global deduplication and enhanced compression directly impacts storage total cost of ownership.

For enterprise and cloud service provider environments, this is important because storage is often one of the largest cost components in private cloud design.

Better data reduction means:

  • less physical NVMe capacity required
  • better usable capacity per host
  • improved cost per usable terabyte
  • better return on vSAN ESA hardware investment

Effective Capacity View

VCF 9.1 introduces a new Effective Capacity view for vSAN. This is a very practical operational improvement because raw capacity, usable capacity, deduplication, compression, and resilience overhead can be difficult to understand in large environments.

The new view helps administrators better understand how much capacity is really available for workloads after accounting for storage policies, resilience, and data reduction.

This is useful for:

  • capacity planning
  • tenant reporting
  • hardware expansion planning
  • TCO analysis
  • cloud service provider chargeback/showback models

vSAN Auto-RAID

VCF 9.1 continues to improve the operational model of vSAN ESA with Auto-RAID. Auto-RAID helps simplify data resilience by automatically selecting appropriate protection behavior based on the cluster configuration and storage policy.

This reduces the need for administrators to manually design every resilience decision and helps make vSAN easier to operate at scale.

vSAN Storage Clusters and Disaggregated Storage

VCF 9.1 improves the vSAN storage cluster model. This is important because not every environment wants a pure HCI model where compute and storage must always scale together.

With disaggregated storage, organizations can separate compute scaling from storage scaling. This is useful when some clusters need more CPU and memory while other parts of the environment require more storage capacity or storage performance.

This model is especially interesting for:

  • large private cloud platforms
  • cloud service providers
  • dedicated storage clusters
  • environments with mixed workload profiles

End-to-End Encryption for vSAN Storage Clusters

VCF 9.1 adds stronger security for disaggregated vSAN storage topologies. vSAN can now provide end-to-end encryption of storage traffic between the client cluster and the storage cluster.

This is an important feature for regulated industries such as finance, healthcare, government, and service provider environments where storage traffic protection is a design requirement.

Native S3-Compatible Object Storage

Another major storage-related announcement is native S3-compatible object storage in vSAN for VCF 9.1.

This is significant because vSAN is no longer only about VM block storage and file services. With native S3-compatible object storage, VCF moves closer to a complete private cloud storage platform.

The strategic direction is clear: provide block, file, and object storage capabilities from the same private cloud platform.

This can be useful for:

  • cloud-native applications
  • AI and data pipelines
  • backup and archive use cases
  • developer platforms
  • S3-compatible application integrations

vSAN Replication for Workloads on Any Storage

VCF 9.1 extends vSAN replication capabilities. Workloads running on non-vSAN storage can now be replicated to a vSAN ESA target.

This is very important for heterogeneous enterprise environments where not all workloads run on vSAN. Many organizations still use external enterprise arrays, NFS, VMFS, or other software-defined storage platforms.

With this enhancement, vSAN ESA can become a common recovery target even when production workloads are not running on vSAN.

Flexible Snapshot Scheduling

VCF 9.1 improves native snapshot scheduling for protection and recovery scenarios. Flexible snapshot schedules, including GFS-style retention models, help organizations build longer retention policies directly into the platform.

This is especially useful for cyber recovery and operational recovery scenarios where short-term snapshots are not enough.

Cyber Recovery and Clean Room Use Cases

Storage is no longer only about performance and capacity. In VCF 9.1, storage is also part of cyber resilience.

VCF 9.1, together with VMware Advanced Cyber Compliance, supports on-premises clean room recovery scenarios. This allows organizations to build isolated recovery environments without relying only on cloud-based recovery sites.

For ransomware recovery, this is a very important architectural direction.

Enhanced Support for Enterprise Workloads

VCF 9.1 also strengthens vSAN support for important enterprise workloads, including SAP HANA and SAP NetWeaver scenarios.

This matters because enterprise private cloud platforms must support not only cloud-native applications, but also traditional business-critical applications.

Architecture Impact

From an architecture perspective, the storage changes in VCF 9.1 can be summarized in four major trends:

  • Efficiency: global deduplication and enhanced compression reduce physical capacity requirements.
  • Flexibility: disaggregated vSAN storage allows compute and storage to scale independently.
  • Resilience: replication, snapshots, and clean room recovery improve cyber recovery options.
  • Cloud storage model: native S3-compatible object storage expands vSAN beyond traditional VM storage.

Why This Matters

VCF 9.1 storage enhancements are important because they address several real-world private cloud challenges:

  • How to reduce storage cost?
  • How to improve usable capacity?
  • How to protect workloads from ransomware?
  • How to support both traditional and cloud-native workloads?
  • How to avoid scaling compute and storage together when it is not necessary?

The answer in VCF 9.1 is a more capable vSAN ESA platform with better efficiency, more flexible topology options, stronger protection, and broader storage services.

Conclusion

VMware Cloud Foundation 9.1 brings meaningful storage improvements. The most important changes are vSAN Global Deduplication, enhanced compression, Effective Capacity View, vSAN Auto-RAID, improved disaggregated storage, end-to-end encryption for storage clusters, native S3-compatible object storage, and enhanced protection and recovery capabilities.

For enterprise architects and cloud service providers, VCF 9.1 makes vSAN ESA more attractive as a core private cloud storage platform. It is no longer just a hyperconverged datastore. It is becoming a broader software-defined storage layer for modern private cloud.

References

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