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thanos
Highly available Prometheus setup with long term storage capabilities. A CNCF Incubating project.
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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.
It's weird. Remote write sends exactly the same data with the same resolution as what Prometheus gets from scraping. It should be identical, unless you have issues with remote write which can be tracked via specific metrics.
An alternative solution is to use 3rd party vendors. Thanos can upload Prometheus data to object storage (AWS S3 or GCE) which does not need replication. VictoriaMetrics vmagent can do the scraping and replicate metrics to multiple destinations. TimescaleDB uses bult-in Postgres streaming replication.