7.5.1. 其他时序数据库¶

RRDtool http://oss.oetiker.ch/rrdtool/
关联: Graphite
Kdb+ http://kx.com/
Druid http://druid.io/
KairosDB http://kairosdb.github.io/
from: https://www.sojson.com/blog/67.html
RRD(round-robin-database): RRDtool使用的底层存储。C语言编写的。性能比较高
whisper: Graphite底层的存储,Python写的
prometheus: An open-source service monitoring system and time series database. 目前只有单机版本
kairosdb: OpenTSDB的改善版，底层存储引擎是Cassandra。
Heroic: Kairosdb的改善版，Spotify公司开源的时序数据库（Spotify的监控框架），引入了ElasticSearch作为元数据索引。目前还处于不稳定状态。
CorfuDB: https://github.com/CorfuDB/CorfuDB:
```
A cluster consistency platform
```
TimescaleDB: https://www.timescale.com/:
```
PostgreSQL for time‑series
```

The Berkeley Tree DataBase provides very fast storage of
  scalar-valued timeseries data

Confluo: * https://www.usenix.org/conference/nsdi19/presentation/khandelwal * https://github.com/ucbrise/confluo * Real-time Monitoring and Analysis of Data Streams