Agoda is the Singapore wing of Booking Holdings, the world’s leading provider of online travel (the brand behind Booking.com, Kayak, Priceline, etc.). From January 2023 to February 2025, Agoda server traffic spiked by 50 times. That’s fantastic business growth, but also the trigger for an interesting engineering challenge.
Specifically, the team had to determine how to scale their ScyllaDB-backed online feature store to maintain 10ms P99 latencies despite this growth. Complicating the situation, traffic was highly bursty, cache hit rates…

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