Better and better: new features of Apache IoTDB
summary
Apache IoTDB since v0.12 adds a cluster module built on Raft with separate meta and data Raft groups (strong replication, optional eventual reads), a Java-based UDF and trigger framework loadable as jars without restart, multi-variable time-series and a practical hot‑backup pattern, and time partitioning plus virtual store groups that cut write contention by splitting one logical storage group into N physical shards; used in Shanghai subway for high throughput and a Grafana plugin is forthcoming.
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