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Technical exploration and thoughts · 655 articles
Elasticsearch 7.3 Java Practice: Index & Document CRUD Fu...
elasticsearch-rest-high-level-client implements index and document CRUD, including: create index via JSON and XContentBuilder two ways, config shards and replicas, delete index, insert single docum...
Elasticsearch Term Exact Query & Bool Combination Practic...
This article demonstrates Elasticsearch term-level queries including term, terms, range, exists, prefix, regexp, fuzzy, ids queries, and bool compound queries. Covers creating book index, inserting...
Elasticsearch Filter DSL Full Practice: Filter Query, Sor...
This article introduces Filter DSL vs query difference: Filter DSL doesn't calculate relevance score, specifically optimized for filter scenario execution...
Elasticsearch Mapping & Document CRUD Practice (Based on ...
This article details Elasticsearch 7.x/8.x mapping config and document CRUD operations, including index/field mapping creation, mapping properties (type, index, store, analyzer), document create, q...
Elasticsearch Query DSL Practice: match/match_phrase/quer...
In-depth explanation of core Query DSL usage in Elasticsearch 7.3, focusing on differences and pitfalls of match, match_phrase, query_string, multi_match and other full-text search statements in re...
Spark Cluster Architecture & Deployment Modes
Deep dive into Spark cluster core components Driver, Cluster Manager, Executor responsibilities, comparison of Standalone, YARN, Kubernetes deployment modes, and static vs dynamic resource allocati...
Elasticsearch-Head & Kibana 7.3.0 Practice: Installation ...
Introduction to Elasticsearch-Head plugin and Kibana 7.3.0 installation and connectivity points, covering Chrome extension quick access, ES cluster health and...
Elasticsearch Index Operations & IK Analyzer Practice: 7....
Elasticsearch index create, existence check (single/multi/all), open/close/delete and health troubleshooting, as well as IK analyzer installation, ik_max_word/ik_smart analysis and Nginx hosting sc...
Elasticsearch Getting Started: Index/Document CRUD & Sear...
Elasticsearch (ES 7.x/8.x) minimum examples: Create index, insert document, query by ID, update and _search search flow, with return samples and screenshots, help readers complete 'index/document C...
Elasticsearch 7.3.0 Three-Node Cluster Practice: Director...
Elasticsearch 7.3.0 three-node cluster deployment practice tutorial, covering directory creation and permission settings, system parameter config...
ELK Elastic Stack (ELK) Practice: Architecture Key Points...
Article introduces core capabilities and common practices of Elasticsearch 8.x, Logstash 8.x, Kibana 8.x, covering key aspects of centralized logging system: collection, transmission, indexing, sha...
Elasticsearch Single Machine Cloud Server Deployment & Op...
Elasticsearch is a distributed full-text search engine, supports single-node mode and cluster mode deployment. Generally, small companies can use Single-Node Mode for their business scenarios.
Apache Kylin Cube7 Practice: Aggregation Group/RowKey/Enc...
Covers Aggregation Group, Mandatory Dimension, Hierarchy Dimension, Joint Dimension usage trade-offs, and explains impact of dictionary encoding, RowKey order, ShardBy sharding on build and query p...
Apache Kylin 1.6 Streaming Cubing Practice: Kafka to Minu...
Kafka→Kylin real-time OLAP pipeline, providing minute-level aggregation queries for common 2025 business scenarios (e-commerce transactions, user behavior, IoT monitoring).
Spark RDD Deep Dive: Five Key Features
Comprehensive analysis of Spark core data abstraction RDD's five key features (partitions, compute function, dependencies, partitioner, preferred locations), lazy evaluation, fault tolerance, and n...
Spark RDD Creation & Transformation Operations
Detailed explanation of three RDD creation methods (parallelize, textFile, transform from existing RDD), and usage of common Transformation operators like map, filter, flatMap, groupBy, sortBy with...
Apache Kylin Segment Merge Practice: Manual/Auto Merge, R...
Apache Kylin Segment merge practice tutorial, covering manual MERGE Job flow, continuous Segment requirements, Auto Merge multi-level threshold strategy, Retention Threshold cleanup logic, deletion...
Apache Kylin Cuboid Pruning Practice: Derived Dimensions ...
Cuboid pruning optimization: When there are many dimensions, Cuboid count grows exponentially, causing long build time and storage expansion. Engineering...
Apache Kylin Cube Practice: Complete Guide for Modeling, ...
Apache Kylin 4.0 Cube modeling and query acceleration method: Complete star modeling with fact tables and dimension tables, design dimensions and measures, use...
Apache Kylin Incremental Cube & Segment Practice: Daily P...
Using date field of Hive partitioned table as Partition Date Column, split Cube into multiple Segments, incrementally build by range to avoid repeated computation of historical data; also compare f...