Virtualisation

Virtualisation abstracts physical resources so virtual machines or other isolated environments can run on a hypervisor. It enables workload consolidation and allocation of CPU, memory, storage and networking through a shared management layer. It does not create unlimited capacity or automatic availability: contention, drivers, licences, storage, network and failure domains still matter. A snapshot can support a short change but is not an independent backup or tested recovery process. Design should map workloads, dependencies, reservations, growth, administrative access and behaviour when a host fails. Guest and hypervisor monitoring answer different questions. Validation measures performance and recovery under representative load. Consolidating many services also concentrates impact, so redundancy and operations need evidence.