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We're currently using InfluxDB for some timeseries metrics, but the 2.0 migration path have been terrible, even for simple examples, so we're looking for something else.

Have anyone migrated from InfluxDB to ClickHouse?

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Disclaimer: I work at ClickHouse

At a previous company, I wrote a simple TCP server to receive LineProtocol, parse it and write to ClickHouse. I was absolutely blown away by how fast I could chart data in Grafana [1]. The compression was stellar, as well...I was able to store and chart years of history data. We basically just stopped sending data to Influx and migrated everything over to the ClickHouse backend.

[1] https://grafana.com/grafana/plugins/grafana-clickhouse-datas...

Clickhouse is so stupidly, mindbogglingly fast at what it does that you can often replace a much more specialized databases or specialized schemas / queries with brute force Clickhouse and come out far ahead. It really depends on the size of what you are doing. I've used Clickhouse for timeseries data in the tens of millions events per day and it worked well.

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