File for reproductible environment :

Nothing is stored on the VM instances : see volumes configuration out of the docker-compose file.

Sharding and replica is straightforward and defined in these files :

• ch_configs/config.d/remote_server.xml
• ch-configs/macros_chX.xml (replace X with server’s instance number)

Starting clickhouse servers :

$ docker-compose up -d ch1 ch2 ch3 ch4

$ docker ps -a