Bare Metal vs Virtualized VPS in Romania
Bare metal (dedicated server) and virtualized VPS (KVM) serve different performance profiles. KVM virtualization adds minimal overhead (5-10% CPU) for most workloads; bare metal eliminates this overhead and provides dedicated hardware resources. For most applications, KVM VPS provides sufficient performance at lower cost. Bare metal is the right choice for specific high-performance or security-sensitive use cases.
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KVM Overhead and Performance
KVM hypervisor overhead is well-understood: approximately 3-7% CPU overhead for compute-bound workloads, minimal for I/O workloads with virtio drivers (VirtIO NVMe, VirtIO-net). For standard web applications, databases, and network services, this overhead is imperceptible. For CPU-bound compute (intensive video encoding, large-scale machine learning inference, cryptographic operations at very high volume), bare metal eliminates this overhead and can provide 5-10% better throughput.
Security: Isolation Differences
KVM VPS: hardware-level virtualization with separate kernel and memory namespace per VM. Co-tenants cannot access each other's memory. Historical Spectre/Meltdown side-channel attacks could theoretically leak information across VMs on the same physical host - mitigated in modern kernels. Bare metal: no co-tenants at all. No side-channel risk from other VMs. For sensitive applications with serious threat models, bare metal eliminates the co-tenant risk entirely.
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