Tag
dictionary-encoding
- Jun 24, 2025 Dictionary Encoding and the Cardinality Cliff How replacing repeated values with ordinals shrinks a column, why the win collapses as distinct values grow, and what happens to a column chunk when the dictionary outgrows its budget. data engineering
- Feb 10, 2025 Block Compression and Columnar Layout for Log Storage Why compressing a block of records beats compressing each record, how column-wise encoding exposes value locality, and what the block size trades away. observability