Architectural design principles for 99.9% uptime guarantee.
What is High Availability?
High Availability (HA) is an architectural design approach that ensures systems continue to operate even during planned or unplanned outages.
Availability Metrics
- 99% (Two Nines): ~3.65 days downtime per year
- 99.9% (Three Nines): ~8.76 hours downtime per year
- 99.99% (Four Nines): ~52 minutes downtime per year
- 99.999% (Five Nines): ~5 minutes downtime per year
HA Design Principles
1. Eliminate Single Points of Failure
Have backups for every critical component. Including load balancers, databases, and network connections.
2. Horizontal Scaling
Use multiple smaller servers instead of a single powerful server.
3. Automatic Failover
Automatically switch to backup systems in case of failure.
4. Geographic Distribution
Protect against regional failures by operating in multiple data centers.
5. Graceful Degradation
Ensure core functions continue to work even during partial failures.
CloudRUX HA Infrastructure
CloudRUX offers a 99.9% SLA guarantee. Achieve high availability with redundant power, multiple network connections, automatic failover, and geographic replication options.