clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- FR: an ability to control server-wide parallelism of s3queue retrieval+processing
- RL or MAB tuning of query settings (based on statistics per normalized_query_hash)
- max_threads_for_leaf setting
- Preserve value if TOAST reference is received
- Support Array of Double Sketches/Tuple Sketches in Clickhouse similar to Druid
- If I specify an incorrect value of the buffer size, it shows the error, Logical error: 'Too large size (...) passed to allocator. It indicates an error.'
- materialize_projections_on_insert
- Stale field references microseconds/milliseconds
- Some exceptions are too long
- ClickHouse-Keeper fails to start on Ubuntu 22.04 on AWS with exit code 233/RUNTIME_DIRECTORY
- Docs
- C++ not yet supported