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| ==== Lecture 4: More Index Structures ==== | ==== Lecture 4: More Index Structures ==== | ||
| - | * During Lecture 4 ({{:teaching:infoh417:slides-lect4-part1.pdf|slides part I}}, {{:teaching:infoh417:slides-lect4-part2.pdf|slides part II}}, {{:teaching:infoh417:slides-ch13-indexstruc.odp|slides part II in OpenOffice Impress format}}) we have studied index structures based on hashing. Hash-based indexes are discussed in depth in section 14.3 and 15.7 in the book. | + | * During Lecture 4 ({{:teaching:infoh417:slides-lect4-part1.pdf|slides}}, {{:teaching:infoh417:slides-ch13-indexstruc.odp|slides in OpenOffice Impress format}}) we have studied index structures based on hashing. Hash-based indexes are discussed in depth in section 14.3 and 15.7 in the book. |
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| * In addition, we have also introduced data warehouses {{:teaching:infoh417:slides-lect5.pdf|slides}}) and motivated the need for multidimensional index structures. Subsequently, we and have studied various index structures that deal gracefully with multidimensional search keys. See sections 14.4-14.6, pages 661-688 (in the international edition) or pages 649-676 (in the new international edition) of the book. | * In addition, we have also introduced data warehouses {{:teaching:infoh417:slides-lect5.pdf|slides}}) and motivated the need for multidimensional index structures. Subsequently, we and have studied various index structures that deal gracefully with multidimensional search keys. See sections 14.4-14.6, pages 661-688 (in the international edition) or pages 649-676 (in the new international edition) of the book. | ||
| + | ==== Project Assignment: External Memory Algorithms ==== | ||
| + | * In this assignment you are asked to implement an external-memory merge-sort algorithm, and examine its performance under different parameters. Be sure to visit the [[teaching:infoh417:project|project's page]] for full details and modalities. | ||