Product overview
Enterprise NFS, without the open-source limits
Fusion NFS is a commercially supported NFS server that gives your customers fast, dependable access to shared data on your storage platform. It runs in user space at kernel-class speed, so you get the throughput and keep the flexibility. Because it shares its core with Fusion SMB, NFS and SMB clients can work on the same data.
On a single 200GbE port, Fusion NFS delivers 22.7 GB/s, and one deployment scales to over a million exports. Transparent failover keeps exports online if a node goes down, and every deployment comes with a commercial license and dedicated support from Tuxera.
Faster than the kernel, from user space
In MLPerf Storage 2.0 3D U-Net training on 200GbE, Fusion NFS kept 12 H100 accelerators above 90% utilization, against 9 for kernel NFSD and 5 for NFS-Ganesha, at 22.7 GB/s measured throughput. Fusion NFS also outperforms NFSD on large-IO random reads over RDMA at 200GbE.
Exports
1
million
1,048,575 exports supported per deployment, 50,000 tested
Connections
10
k
NFS connections tested today
MLPerf
12
H100s
Kept above 90% utilization in MLPerf Storage 2.0, against 9 for kernel NFSD
Throughput
22.7
GB/s
Measured single-run throughput, ahead of NFSD and NFS-Ganesha
Downtime
0
Rolling upgrades and global reconfiguration without a restart
Support
24
/7
Commercial support with SLAs and partner-driven feature development
Open-source NFS servers were built for general use. Fusion NFS was designed for enterprise storage products. Because it runs in user space it can be containerized, which kernel NFSD cannot, so each tenant can get its own instance and a single cluster can carry more exports than most providers will ever need. For sovereign and EU-hosted services, Fusion NFS comes from a Finnish company, under a commercial license with no GPL obligations for your own code.
KEY FEATURES
NFS 4.0 and 4.1
Modern, stateful NFS for Linux and HPC clients, with Kerberos authentication through Active Directory or LDAP.
NFS over RDMA
High throughput with low CPU for AI and HPC, plus client trunking across multiple network paths per client for bandwidth and resilience.
User mode
Runs outside the kernel, in containers or on bare metal. Each tenant can have its own instance, and global settings change without a restart.
Scale-out and rolling upgrades
Scale-out clusters where clients ride through node loss, with cluster rolling upgrades at zero downtime.
Massive export scale
1,048,575 exports per deployment and 10,000 tested connections, against 1,000 exports and 4,000 connections for Ganesha.
Multiprotocol with Fusion SMB
NFS locks and SMB opens are coordinated in one place, and NFSv4 ACLs are stored centrally and kept consistent with Windows ACLs, so Linux compute, Windows desktops and Mac workstations work on one copy of the data.
NFS 4.0 and 4.1
Modern, stateful NFS for Linux and HPC clients, with Kerberos authentication through Active Directory or LDAP.
NFS over RDMA
High throughput with low CPU for AI and HPC, plus client trunking across multiple network paths per client for bandwidth and resilience.
User mode
Runs outside the kernel, in containers or on bare metal. Each tenant can have its own instance, and global settings change without a restart.
Scale-out and rolling upgrades
Scale-out clusters where clients ride through node loss, with cluster rolling upgrades at zero downtime.
Massive export scale
1,048,575 exports per deployment and 10,000 tested connections, against 1,000 exports and 4,000 connections for Ganesha.
Multiprotocol with Fusion SMB
NFS locks and SMB opens are coordinated in one place, and NFSv4 ACLs are stored centrally and kept consistent with Windows ACLs, so Linux compute, Windows desktops and Mac workstations work on one copy of the data.
Frequently asked Questions
Why choose Fusion?
Get answers to the most commonly asked questions, or reach out if your question isn’t listed here.
For nearly a decade, Tuxera has produced Fusion SMB to deliver an enterprise-grade SMB server that replaces Windows Server and Samba, whether on-premises or in the cloud. Flexible, powerful and now the world’s most advanced SMB server for Linux.
We are now focusing on NFSD and Ganesha. We have identified a market need for an enterprise NFS to serve the AI, ML and HPC sectors. Fusion SMB features like RDMA, scale-out, and zero-downtime cluster rolling upgrades will be available with Fusion NFS, and most importantly, the protocols will allow access to the same data.
No, Fusion SMB or Fusion NFS can be run independently. However, both protocols are often required. Traditionally, only the largest storage vendors offered a true multi-protocol solution. This is where Tuxera Fusion demonstrates its strength.
Fusion SMB and Fusion NFS will work seamlessly together, delivering multi-protocol support for any Linux server wherever deployed. Linux, Windows and macOS clients will be able to connect with the protocol of their choice, and we will manage permissions and locking.
A fundamental aspect of NFS performance is the use of RDMA. With faster performance than NFSD over RDMA, or Ganesha over TCP (which does not support RDMA). We can deliver 22.7GB/sec compared to 22.5GB/sec for NFSD and 13.6GB/sec for Ganesha. (1x200GbE port)
Aggregate performance and high availability via scale-out will also be available from day one. When combined with rolling upgrades, this creates a true enterprise NFS solution that provides continuous ultra-high performance to connected systems.
Cloud service providers
Choose our highly scalable, low overhead, container-based file server. Increase tenant density, while decreasing compute resources.
Learn more
Data platform providers
Unleash the full potential of your platform's capabilities with the world's fastest SMB solution.
Learn more
Media & entertainment
Handle massive 4K, 8K, and 16K video files across Mac, Windows, and Linux at speeds other solutions can't match.
Learn more
Medical & healthcare
Spend less time waiting for progress bars and more time innovating and making breakthroughs.
Learn more
System integrators
Get the secure, scalable, compatible solution, with the most flexibility, without compromising on capabilities.
Learn more
Technical specifications
Detailed product specifications
Local evaluations are possible with our NFS server implementation. Get in touch or find a local partner in your region.
TUXERA FUSION DOCUMENTATION
- Supports NFS 4.0 and 4.1
- Supported on Intel, AMD, Arm and PowerPC
- User mode deployment, in containers or on bare metal
- NFS over RDMA
- NFS client trunking
- Multiprotocol access with Fusion SMB: central lock and handle control, shared NFSv4 and Windows ACLs
- Scale-out clustering with transparent failover (active-active, active-passive)
- Cluster rolling upgrade with zero downtime
- Dynamic global reconfiguration without a restart
- 1,048,575 exports per deployment, 50,000 tested
- 10,000 NFS connections tested
- Distributed file system support
- Supports standalone file systems such as ext4, XFS and ZFS
- Supports distributed cluster file systems such as WekaFS, IBM Storage Scale (GPFS), DAOS, CephFS, Lustre, GlusterFS, GFS2 and OCFS2. Custom VFS module development is available.
- Kerberos authentication through Active Directory or LDAP
- NFSv4 ACLs stored centrally and kept consistent with Windows ACLs
- Partner-driven feature development
- Commercial license with no GPL or LGPL obligations on your product
- Log/audit support
- Internal health monitoring
- Runtime statistics
- Quota support
RELATED RESOURCES
More resources for inspiration
Why better SMB performance is key to speeding up data transfers
Learn more
Fusion File Share by Tuxera failover and recovery in Kubernetes
Learn more
Improving file server reliability using SMB transparent failover with continuous availability
Learn more
Tuxera and IDEATEC have signed a strategic partnership to build a joint Data-to-Action model for enterprise AI. Fusion SMB provides the file data access layer, IDEATEC’s AX iPaaS turns AI…
Windows and macOS have never stopped relying on SMB, and cloud platforms have not either. Four workloads where SMB support creates a clear opportunity for cloud service providers, and what…
Most enterprise storage runs on two protocols, SMB and NFS, kept apart for decades because neither knows about the other’s locks or permissions. Tuxera Fusion brings both onto one platform…
Fusion SMB, Tuxera’s Linux SMB server, read at 46.86 GB/s where Samba, the open-source SMB server for Linux, managed 4.17 GB/s on identical hardware. A short tour of the MLPerf,…
Quieter aisles, sharper conversations. Duncan Beattie on why NAB 2026 was Tuxera’s best show yet — and the performance numbers that made a year-old benchmark look quaint: 10.5 GB/s to…
When AI platforms underperform in production, most teams reach for more GPUs. But the real bottleneck is often the storage layer ; how data reaches compute, not compute itself. Shared…
Tuxera is showcasing breakthrough file sharing performance at NAB Show, highlighting its Fusion SMB platform and a technology preview of Fusion NFS. With speeds reaching 40 GB/s via Windows SMB…
Modern broadcast security must move beyond perimeter defenses, embedding encrypted workflows, zero trust principles, and resilient transport directly into distributed production infrastructure.
Ned Pyle compares Fusion SMB, a Linux SMB server, with Windows Server on scale, clustering, performance, and security, using side-by-side tests on the same hardware.
Tuxera, the award-winning global leader in quality-assured file systems and storage management solutions, is expanding its reach in Korea with Ocube taking responsibility for promoting and distributing Tuxera’s product portfolio in the country. Earlier…
Seamless data access and enhanced security across massive research data infrastructure. Helsinki, Finland [Dec 1, 2025] – Tuxera, a leading provider of quality-assured file systems and networking technologies, announces that…
Tuxera brought Fusion SMB and a technology preview of Fusion NFS to SC25 in St. Louis, while IBM partner Data In Science Technologies showed Fusion SMB running in IBM Storage…