Vector search
Native ANN via vector data type + SAI. Similar to pgvector for Postgres. RAG on Cassandra without external vector DB.
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SAI (Storage-Attached Index)
Compact, fast secondary index. Replaces SASI. Better performance + smaller footprint.
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Unified Compaction Strategy
New adaptive compaction. Combines STCS + LCS benefits. Tunable scaling parameter. Recommended default.