Hardware failures are inevitable in any data center. At Tilaa, we mitigate this risk by maintaining a strict N+1 Redundancy strategy across all our clusters. This ensures that hardware issues rarely impact your service availability.
What is N+1 Redundancy?
We design our infrastructure so that there is always more capacity available than is currently needed. For every cluster of active servers (hypervisors), we keep specific machines online but empty.
Hot Spares:
These "spare servers" are fully configured, powered on, and connected to the network and storage backend. They sit idle, waiting to take over workload instantly if an active server fails.
These "spare servers" are fully configured, powered on, and connected to the network and storage backend. They sit idle, waiting to take over workload instantly if an active server fails.
How this protects your VPS
This setup allows for High Availability (HA) and rapid recovery:
- Automatic Failover: If the physical server hosting your VPS experiences a critical hardware failure (e.g., a motherboard crash), our monitoring system detects this immediately.
- Instant Migration: Because your data is stored on shared central storage (SAN), we instantly reboot your VPS on one of the waiting "Hot Spare" servers.
- Result: Your server is back online within minutes, without us needing to repair the broken hardware first.
Proactive Maintenance
We also use this capacity for preventative maintenance. If our monitoring detects a potential issue (like a failing memory module) on a host:
- We Live Migrate all running VPSs from that host to a spare server.
- Your server stays online without interruption.
- Our engineers can then safely take the faulty hardware offline for repairs.