Announcing OpenTSDB 2.4.0: Rollup and Pre-Aggregation Storage, Histograms, Sketches, and More

This post announces OpenTSDB 2.4.0, detailing the implementation of Rollup and Pre-Aggregation Storage for efficient long-term data retention and faster querying of aggregated data. It also introduces support for Histograms and Data Sketches (specifically mentioning Yahoo's Data Sketches library) for accurate percentile calculations across multiple time series, addressing a mathematical limitation of combining individual percentile data. Additional features include HBase Date Tiered Compaction, a new authentication plugin interface, direct data fetching from Bigtable/HBase via search indexes, enhanced UID cache controls, and configurable query limits.