Thanks for the compliment! It's becoming a habit with us and benchmarks. We just really want to dig in and understand what's going on and why things work the way they do. ;-)
There really are so many nuances and as we tried to say a number of times, ClickHouse is really great at what it does well. But it's still OLAP at heart (which precludes OLTP features many apps take for granted) and after enabling TimescaleDB compression, the query story isn't as cut and dry. We don't claim that TimescaleDB is the fastest in all circumstances, or that it absolutely has to be for every workload. Features and versatility play a major part in the decision.
> Versions: TimescaleDB version 2.4.0, community edition, with PostgreSQL 13
and the link you posted explains that it's the non OSI license version:
> TimescaleDB Community is made available under the Timescale License ("TSL")
I would assume it does but reading the article implies that it does not.
The code that's currently used by TSBS was submitted by Altinity, a heavy supporter of ClickHouse in the U.S., but TSBS is open source and anyone is welcome to contribute and make the process/test better!
May be worth pointing that out in the article since the increased disk usage has been mentioned multiple times in the article without any indication that it's only temporary until ClickHouse merges the parts.
How much you save is again exactly the same as when dealing directly with files: it depends on the data and on the compression algo.
From what I see, the trade off in disk space usage would point me toward Timescale for most of my workloads. The insert performance tradeoff just wouldn’t justify the difference for me.