Evolution of Memory Management: Fixed Partition, Dynamic Partition, and Overlay Techniques

Early computers used fixed‑size partitions that wasted space, then dynamic partitions that improved utilization but caused fragmentation, and finally overlay techniques that let programs exceed physical RAM by swapping modules, each step exposing limitations that ultimately drove the creation of virtual memory systems.

Operating SystemsOverlayVirtual Memory

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Evolution of Memory Management: Fixed Partition, Dynamic Partition, and Overlay Techniques

Big Data Technology & Architecture

May 27, 2022 · Databases

Advanced Doris Features: Rollup, Join Types, Colocation, Dynamic Partition, Bitmap, and Materialized Views

This article explains Doris database enhancements including Rollup indexes, Broadcast/Shuffle/Colocation joins, dynamic partition management, bitmap aggregation, and materialized view creation, providing syntax examples and operational principles for each feature.

BitmapColocationJOIN

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Advanced Doris Features: Rollup, Join Types, Colocation, Dynamic Partition, Bitmap, and Materialized Views

Big Data Technology & Architecture

Oct 28, 2020 · Big Data

Optimizing Hive Queries: Fetch Task Conversion, Local Mode, Map‑Side Aggregation, and Dynamic Partitioning

This article explains how to optimize Hive query performance by configuring fetch task conversion, enabling local mode, using map‑side aggregation, handling COUNT(DISTINCT) efficiently, avoiding Cartesian joins, applying partition and column pruning, and setting dynamic partition parameters, with practical command‑line examples.

dynamic partitionlocal modequery optimization

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Optimizing Hive Queries: Fetch Task Conversion, Local Mode, Map‑Side Aggregation, and Dynamic Partitioning