Persistence

Symptom data is persisted for durability, recovery, and historical analysis.

Persistence Layers

In-Memory State

• Active symptom tracking
• Real-time queries
• Sub-millisecond access

Checkpoint Storage

• Periodic state snapshots
• Recovery after failures
• Point-in-time restoration

Historical Storage

• Complete symptom records
• Long-term retention
• Analytics and reporting

Data Retention

Retention policies by tier:

• Active: Until resolved + 24 hours
• Recent: 90 days rolling
• Archive: Per tenant configuration (1-7 years)

Recovery

On component failure:

• State restored from checkpoints
• Replay of recent events
• Consistent state reconstruction
• No symptom loss

Query Patterns

Different storage tiers support:

• Real-time dashboards (in-memory)
• Operational queries (recent storage)
• Historical reports (archive storage)