How TTD Ticket Booking Handles Millions of Users

“Millions log in for TTD tickets at the same time…
so why doesn’t the website crash?”

Instead of letting everyone hit the server at once, the system places every user in a distributed queue.
Slot selection triggers instant backend locking to prevent duplicate darshan bookings.
After successful payment, only then the reservation is permanently written to the database and the Booking ID + PDF is generated.
Save this post if you want more breakdowns of real Indian tech systems.

TTD is built to withstand extreme traffic and concurrency.

• Traffic Flow: Distributed Queue – Kafka / SQS / EventBridge
• Slot Safety: Redis RedLock
• Payment: Razorpay / Paytm / HDFC PG
• Ledger: Aurora PostgreSQL / DynamoDB
• PDF Tickets: Lambda + S3
• Scalability: Auto Scaling + CloudFront CDN

This architecture handles millions of users gracefully — every single release.
Should I break down IRCTC Tatkal Payments or Tirumala Laddu Token System next?