99.9% uptime allows for at most 8.76 hours of downtime per year, or approximately 43.8 minutes per month. This figure covers infrastructure-caused downtime - hardware failures, network outages, and data center issues. Planned maintenance windows are communicated in advance and typically scheduled outside peak usage hours.
Achieving 99.9% uptime requires redundancy at every level of the infrastructure stack. Power redundancy (UPS and generator backup) prevents outages from facility power interruptions. Network redundancy (multi-homed uplinks) prevents outages from individual carrier failures. Hardware spare parts availability prevents extended downtime from component failures. AnubizHost invests in all three layers.
For VPS clients, the underlying hypervisor infrastructure is also redundant. If a hypervisor node requires maintenance, live migration moves VPS instances to another node with minimal downtime. This hypervisor-level redundancy is a key enabler of consistent uptime for VPS clients.