clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Perf(TimeSeries): Fuse TimeSeries tag pair extraction
- readonly=2 blocks transition to more-restrictive readonly=1
- Include the peer address in deferred connect errors
- Add min_unreserved_disk_space_for_merge MergeTree setting
- Do not overwrite files on S3Queue move destination collision
- Add more OS sanity checks on server startup
- Quadratic complexity of applying MergeOnKey patch parts with long equal-key runs
- PromQL histogram_avg/histogram_stddev/histogram_stdvar over native histograms
- PromQL histogram_quantile/histogram_fraction over native histograms
- Silent data loss: ATTACH PARTITION FROM + ON CLUSTER drops all rows on multi-replica shards with no error
- Docs
- C++ not yet supported