- Added a pluggable data format engine with Lucene support, dynamic property definitions, tiered storage APIs (WritableWarm, Hot/Warm tiering) and a block‑cache SPI.
- Enhanced the analytics engine: distributed aggregation/join, many new PPL commands/functions (window, datetime, math, crypto, etc.), native Arrow transport, and gRPC aggregation support.
- Implemented native memory admission control, backpressure, workload‑management settings, and deprecated the boolean constructor of FetchSourceContext with warnings.
3.7.0
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Fixed bugs: bulk request hang when an index is deleted, case‑insensitive/escaped wildcard queries, array‑index errors on wildcard fields, and negative fielddata stats.