OVHcloud, a leading European cloud hosting provider, migrated its time series data to Grafana Mimir to enhance its observability platform, which serves 1.4 million global customers. The decision was driven by the need for a reliable, scalable, and compliant remote storage solution that supports multi-tenancy and prevents the "noisy neighbor" effect, ensuring operational efficiency. Grafana Mimir was chosen for its Prometheus compatibility, robust open-source community, and extensive documentation, aligning with OVHcloud's open-source philosophy. Rigorous benchmark testing using Grafana k6 confirmed Mimir's capability to handle high data volumes and growth, reducing complexity and improving cost efficiency. This decision reflects OVHcloud's commitment to transparency and scalability, aiming to contribute back to the open-source community while ensuring a flexible infrastructure for future expansion.