https://jiangxt2.github.io/en/concepts/Recent content in Core concepts on PortraitsHugoen-USThu, 17 Sep 2026 00:00:00 +0000https://jiangxt2.github.io/en/concepts/columnar-storage/Thu, 17 Sep 2026 00:00:00 +0000https://jiangxt2.github.io/en/concepts/columnar-storage/Understand row and column storage through access patterns, compression, scans, and write cost.https://jiangxt2.github.io/en/concepts/shuffle/Thu, 17 Sep 2026 00:00:00 +0000https://jiangxt2.github.io/en/concepts/shuffle/Why distributed systems redistribute data, and where shuffle cost comes from.https://jiangxt2.github.io/en/concepts/vectorized-execution/Thu, 17 Sep 2026 00:00:00 +0000https://jiangxt2.github.io/en/concepts/vectorized-execution/Understand vectorized execution as batch processing instead of row-at-a-time work, especially in OLAP systems.