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Comment by hagen1778
Storing telemetry efficiently is only part of what Monitoring is supposed to do. The other part is querying: ad-hoc queries, dashboards, alerting queries executed each 15s or so. For querying to work fast, there has to be an efficient index or multiple indexes depending on the query.
Since you referred ClickHouse as efficient columnar storage, please see what makes it different from a time series database - https://altinity.com/wp-content/uploads/2021/11/How-ClickHou...