How Monzo Bank reduced cost of TTL from time series index tables in Amazon Keyspaces

Original URL: https://aws.amazon.com/blogs/database/how-monzo-bank-reduced-cost-of-ttl-from-time-series-index-tables-in-amazon-keyspaces/

Added Date: January 27, 2025

Memo: Monzo Bank optimized their data retention strategy in Amazon Keyspaces by replacing the traditional Time to Live (TTL) approach with a bulk deletion mechanism. By partitioning time-series data across multiple tables, each representing a specific time bucket, they can efficiently drop entire tables of expired data. This method significantly reduces operational costs associated with per-row TTL deletions.