Understanding Metrics
Deep dive into health scores, performance metrics, and network analytics
Health Score System
XandScan uses a storage-first scoring system optimized for Xandeum's mission to provide exabyte-scale storage for Solana dApps.
Score Components
Storage Health (30% weight)
Optimal capacity utilization between 60-80%. Too low means wasted capacity, too high risks running out of space.
Availability (30% weight)
Percentage of nodes actively providing storage access. Higher is better.
Version Health (25% weight)
Percentage of nodes running the latest software version for compatibility.
Distribution (15% weight)
Geographic diversity and decentralization across countries and regions.
Health Score = (Storage × 30%) + (Availability × 30%) + (Version × 25%) + (Distribution × 15%)
Network Health Grade
The letter grade system provides quick assessment based on composite scoring:
A+ / A (90-100 points)
Excellent: Uptime 99%+, latency <50ms, active nodes >90%, optimal storage
B (70-89 points)
Good: Uptime 95%+, latency <100ms, active nodes 80-90%, good storage management
C (50-69 points)
Fair: Uptime 90%+, latency <200ms, monitoring recommended
D / F (<50 points)
Poor: Low uptime, high latency, or critical storage/availability issues
Performance Metrics Explained
Uptime
Percentage of time a node is online and responsive. Calculated as:
Uptime = (Time Online / Total Time) × 100
- • 99%+ = Exceptional (less than 7 hours downtime per month)
- • 95-99% = Very good (1-2 days downtime per month)
- • 90-95% = Good (2-3 days downtime per month)
- • <90% = Needs improvement
Latency
Average time for a node to respond to requests, measured in milliseconds (ms):
- • <50ms = Excellent (local/nearby node)
- • 50-100ms = Very good (regional node)
- • 100-200ms = Good (distant node)
- • 200-500ms = Fair (international node)
- • >500ms = Poor (very distant or overloaded)
Storage Efficiency
How well storage capacity is utilized:
- • 60-80% used = Optimal (room to grow, actively used)
- • 40-60% used = Good (some capacity available)
- • <40% used = Underutilized (wasted capacity)
- • >80% used = High utilization (may need expansion soon)
- • >90% used = Critical (expansion recommended)
Success Rate
Percentage of successful operations vs. total operations:
- • 99%+ = Excellent (very reliable)
- • 95-99% = Good (occasional failures)
- • 90-95% = Fair (frequent failures)
- • <90% = Poor (unreliable node)
Decentralization Score
Measures geographic distribution and network resilience (0-100):
- • Based on number of unique countries and regions
- • Considers distribution evenness (not just total countries)
- • Higher scores indicate better fault tolerance
- • 90+ = Highly decentralized
- • 70-89 = Well distributed
- • 50-69 = Moderately distributed
- • <50 = Centralized (concentration risk)
Key Takeaways
- • Storage and availability are weighted highest (60% combined)
- • Health scores update every 30 seconds with live data
- • Geographic diversity improves network resilience
- • Version health ensures network-wide compatibility
- • All metrics are calculated from real pNode data via pRPC