Booking.com migrated its 250 PB Hadoop data lake (500 PB with replication) to a new platform on schedule and without downtime, detailing the architecture and processes that enabled Europe’s largest data lake move.

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Booking.com migrated its 250 PB Hadoop data lake (500 PB with replication) to a new platform on schedule and without downtime, detailing the architecture and processes that enabled Europe’s largest data lake move.

Booking.com re‑engineered its largest Node.js service, cutting compute costs by 38%, using fewer pods, 20% less memory per pod, and reducing latency without code changes.