Daily Active Users: 500K DAU
Concurrent Users: 100K average
Events Browsed: 5M page views/day
Tickets Sold: 50K tickets/day
Peak Hours: 6-9 PM local time (3x normal traffic)

Concurrent Users: 10M users simultaneously
Queue Entries: 10M users in virtual queue
Tickets Available: 50K tickets
Sale Duration: 2-3 hours
Purchase Rate: 50K tickets/minute peak
Success Rate: 0.5% (50K tickets / 10M users)

T-60 min: 100K users (normal)
T-30 min: 500K users (5x - pre-sale anticipation)
T-10 min: 2M users (20x - queue opens)
T-0 min: 10M users (100x - sale starts)
T+30 min: 5M users (50x - still trying)
T+60 min: 2M users (20x - sold out)
T+120 min: 500K users (5x - back to normal)

Normal: 10K requests/second
Major Sale Peak: 1M requests/second (100x spike)

Breakdown:
- Event page loads: 500K req/s
- Seat availability checks: 300K req/s
- Add to cart: 100K req/s
- Checkout attempts: 50K req/s
- Payment processing: 10K req/s

Reads: 800K reads/second (availability checks)
Writes: 50K writes/second (reservations, purchases)
Transactions: 10K transactions/second (payment processing)

Active Events: 100K events
Event Details: 100K × 50KB = 5 GB
Seat Maps: 100K × 500KB = 50 GB
Total Event Data: 55 GB

Total Seats: 100K events × 5K seats avg = 500M seats
Seat Status: 500M × 100 bytes = 50 GB
Reservation Data: 10M active reservations × 1KB = 10 GB
Total Inventory: 60 GB

Users: 100M × 5KB = 500 GB
Order History: 500M orders × 2KB = 1 TB
Payment Data: 500M transactions × 1KB = 500 GB
Total User Data: 2 TB

Normal: 100 MB/s
Peak: 10 GB/s (100x spike)

Breakdown:
- API requests: 8 GB/s
- Image uploads: 1 GB/s
- WebSocket connections: 1 GB/s

Normal: 500 MB/s
Peak: 50 GB/s (100x spike)

Breakdown:
- Event pages: 30 GB/s
- Seat maps: 10 GB/s
- API responses: 5 GB/s
- Ticket PDFs: 5 GB/s

Normal: 500 instances (16 vCPU, 32GB RAM each)
Peak: 50,000 instances (100x scale-up)
Auto-scaling: Scale from 500 to 50K in 10 minutes
Total Compute: 800K vCPUs, 1.6 PB RAM at peak

Primary Databases: 100 shards (64 vCPU, 256GB RAM)
Read Replicas: 500 replicas (32 vCPU, 128GB RAM)
Cache Clusters: 1,000 Redis nodes (16 vCPU, 128GB RAM)
Total: 100K vCPUs, 200 TB RAM

Queue Capacity: 10M concurrent users
Queue Processing Rate: 10K users/second
Average Wait Time: 15-30 minutes
Queue Data: 10M × 1KB = 10 GB

Enqueue: 100K users/second
Dequeue: 10K users/second
Position Updates: 10M updates/minute
Heartbeat Checks: 10M checks/minute

Compute (50K instances × 8 hours): $400K
Database (peak load): $50K
Cache (1K nodes × 8 hours): $20K
CDN (50 TB transfer): $10K
Queue System: $10K
Total: $490K per major sale

Annual (50 major sales): $24.5M
Normal operations: $5M/year
Total Annual: $29.5M

Infrastructure: $0.06 per ticket
Payment Processing: $0.50 per ticket (2% + $0.30)
Total: $0.56 per ticket
Revenue: $15 per ticket (10% commission on $150 avg)
Margin: $14.44 per ticket (96% margin)