What tasks did you have with ClickHouse?

In working with ClickHouse, I often encountered tasks such as:

• Optimizing queries for analytics on large volumes of data to reduce response time.
• Configuring partitioning and indexes to speed up queries.
• Integrating ClickHouse with streaming systems (e.g., Kafka) for real-time data loading.
• Solving issues related to load and query balancing in the cluster.
• Setting up data backup and recovery.

For example, to speed up reports, I had to redesign the table schema by adding materialized views and optimizing aggregate functions.