clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- ClickHouseMetrics_VersionInteger metric in http://nameVM:9363/metrics does not show the version for clickhouse-keeper
- Async CPU metrics values are unexpected after upgrading to ClickHouse 25.5.x
- Query condition cache on disk
- Implement Vamana for ANN Vector Search (much faster than HNSW)
- Better support for nested columns
- Adding Replication Support to EmbeddedRocksDB Engine (Disk Only)
- Inconsistent conversion of null to String.
- Push down predicates through VIEW to remote table functions/engines (PostgreSQL/MySQL)
- Four letter word commands for clickhosue-keeper to view the cluster composition
- Multiple authentication methods not supported for xml configuration
- Docs
- C++ not yet supported