Proxmox + TrueNAS — The Perfect Virtualisation Foundation

Virtualisation has long become the backbone of modern IT infrastructures. Yet while many organisations rely on expensive, proprietary solutions, the combination of Proxmox VE and TrueNAS offers a powerful, flexible, and cost-effective alternative. Both systems come from the open-source world, deliver enterprise functionality — and complement each other perfectly. Together, they form a robust foundation for virtualisation, containerisation, and storage management that leaves nothing to be desired.

Why Proxmox and TrueNAS Are Such a Great Match

The key lies in the clear separation of responsibilities: Proxmox handles virtualisation and workload management, while TrueNAS serves as a powerful storage backend. Through native support for ZFS, snapshots, replication, and high availability, the result is a harmonious infrastructure that combines stability, performance, and fault tolerance — entirely without licence costs.

Benefits at a Glance:

• Open source without compromise: full transparency and control

• Enterprise features included: clustering, HA, snapshots, replication

• Scalable: from small setups to enterprise environments

• Cost-effective: no licence or subscription fees

• Flexible: deployable on-premises, hybrid, or at the edge

Architecture in Action

In a typical setup, TrueNAS acts as the central storage system, while Proxmox provides the compute power and virtualisation.

• Storage connectivity: TrueNAS can be connected to Proxmox via NFS, iSCSI, or SMB.

• Cluster functionality: Multiple Proxmox nodes access the same TrueNAS storage and can automatically restart virtual machines or containers in the event of a failure (high availability).

• Data security: ZFS on TrueNAS provides checksums, snapshots, and replication — a shield against data loss and ransomware.

This setup enables both performance-intensive virtual machines (VMs) and container workloads to be operated reliably and at scale.

High Availability and Fault Tolerance

A key argument for the combination of Proxmox and TrueNAS is their capacity for high availability.

• Proxmox detects a node failure and automatically restarts affected VMs on another host.

• TrueNAS clusters (e.g. TrueNAS Enterprise) can operate as redundant dual-controller systems.

• Snapshots and asynchronous replication enable rapid recovery — even during site-level outages.

This combination ensures maximum uptime at minimal operating costs.

Performance and Tuning

In virtualised systems, performance depends heavily on the storage architecture. By combining ZFS with modern network design, impressive results can be achieved:

• 10/25/100 Gbit Ethernet for low latency and high throughput

• NVMe cache (L2ARC) for frequently accessed data

• SLOG devices (Separate Log) for write-intensive workloads

• On-the-fly snapshots without performance degradation

• Smart recordsize/volblocksize tuning per workload

This allows Proxmox clusters with TrueNAS storage to deliver enterprise performance without the need for expensive proprietary systems.

Real-World Example: Virtualisation in the Mid-Market

Many mid-sized organisations already rely on the Proxmox and TrueNAS duo. One example: a software company with 80 employees runs its entire development and test environment on a three-node Proxmox cluster with centralised TrueNAS storage.

• Benefit: Centralised management, rapid recovery, predictable costs.

• Result: 40 % lower operating costs with higher performance and fault tolerance.

Conclusion

With Proxmox + TrueNAS, organisations invest in a future-proof IT architecture that combines performance, stability, and cost efficiency. This open-source combination proves that enterprise IT does not have to be expensive to be reliable and scalable.

—> Rethink virtualisation now! Learn how Proxmox and TrueNAS work together in your IT environment:

—> Request a free consultation — we analyse your current infrastructure. —> Try a TrueNAS demo — experience the performance live.

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