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mimir
Grafana Mimir provides horizontally scalable, highly available, multi-tenant, long-term storage for Prometheus.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Perhaps a storage plugin tool like mirmirmight help? they have migration tools, and would then use long term storae (such as S3)
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