Timeseries DB for sampled data based on LSM-tree. Support different sampling strategies and aggregations.

Some references/alternatives/inspiration:

• https://docs.victoriametrics.com/keyConcepts.html
• https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html#deduplication
• https://prometheus.io/docs/prometheus/latest/storage/
• https://bytedance.feishu.cn/docs/doccnZmYFqHBm06BbvYgjsHHcKc - TerarkDB forked from RocksDB
• https://www.influxdata.com/
• https://github.com/questdb/questdb
• http://www.vldb.org/pvldb/vol8/p1816-teller.pdf
• https://github.com/facebookarchive/beringei
• http://daslab.seas.harvard.edu/monkey/
• About timeseries