What is a high-availability cluster?
A high-availability (HA) cluster is an IT architecture in which several physical servers work together as a single system. If one of the servers fails, the others automatically take over its workloads, with no interruption for users. The result: minimal downtime and guaranteed business continuity.
For companies that depend on critical applications — ERP, databases, file servers, email — an HA cluster is no longer a luxury but a necessity.
Virtualization platforms: VMware, Hyper-V or Proxmox?
Virtualization lets you run multiple virtual servers on a single physical server, making better use of hardware and reducing costs. The three main platforms we deploy at Gobalt Solutions are:
VMware vSphere / vSAN — the reference enterprise solution, with advanced HA features, vMotion (live migration of virtual machines) and distributed storage through vSAN. Ideal for complex environments with high performance and availability requirements.
Microsoft Hyper-V — built natively into Windows Server, Hyper-V offers a solid virtualization solution at a lower cost. With Failover Clustering and Storage Spaces Direct (S2D), it can deliver availability comparable to VMware in many scenarios.
Proxmox VE — an open-source alternative that combines KVM virtualization with LXC containers. Excellent for companies that want flexibility and lower licensing costs without sacrificing essential features.
How to choose the right solution?
The choice depends on several factors: budget, environment complexity, performance requirements, team experience and growth plans. VMware remains the preferred choice for complex enterprise environments, Hyper-V fits very well in Microsoft ecosystems, and Proxmox is ideal for companies that prefer lower-cost open-source solutions.
At Gobalt Solutions we have deployed HA clusters on all three platforms across diverse industries — from aerospace and paper manufacturing to textiles and woodworking. Every project started from a careful analysis of the client's needs, not from a preset technology preference.
The concrete benefits of virtualization
Lower hardware costs — fewer physical servers mean lower costs for power, cooling and data center space.
Fast disaster recovery — virtual machines can be replicated and restored much faster than traditional physical servers.
Scalability — additional resources (CPU, memory, storage) can be added without service interruption.
Snapshots and simpler backups — the ability to create instant restore points before any major change.
If your current infrastructure still relies on standalone physical servers or an outdated virtualization solution, we invite you to explore the available options together. See our reference projects or contact us for a consultation.