This article outlines the framework for data element circulation, identifies three major security and compliance challenges in data flow, and presents five practical measures plus a six‑step method for incorporating data assets into financial statements to enhance transparency and value.
Tencent’s real‑time lakehouse combines Spark, Flink, StarRocks and Presto compute layers with Iceberg‑based management and HDFS/COS storage, and its Intelligent Optimize Service—comprising Compaction, Expiration, Cleaning, Clustering, Index and Auto‑Engine modules—automatically reduces merge time, improves query performance, enables secondary indexing, and dynamically routes hot partitions, while future plans target cold/hot separation, materialized view acceleration, and AI‑driven optimizations.
The talk reviews the rapid evolution of data technologies—from early database foundations and big‑data breakthroughs to the rise of generative AI—highlighting how Ant Group’s data platform is shifting from a cost‑efficiency focus to a value‑centric, multimodal, AI‑driven ecosystem.
The article reviews the rapid advances in generative AI and big‑data technologies, traces the historical development of data infrastructure, and argues that modern data systems are shifting from a cost‑efficiency focus to a value‑centric paradigm driven by multimodal, non‑structured data, vector search and machine‑oriented services.
The TDS platform, central to Baidu MEG’s Turing 3.0 ecosystem, unifies data development, warehouse management, monitoring, and resource control through Spark‑based TDE, a visual studio, and AI‑enhanced tools like Smart Diagnosis and Text2SQL, enabling standardized workflows, scalable scheduling, and handling over 30 k daily tasks.
This article introduces DataFusion, a high‑performance, Rust‑based query engine that leverages Apache Arrow’s columnar memory format to enable fast, extensible data processing across multiple storage formats and cloud sources, explains its architecture, execution model, and provides practical Rust code examples for custom extensions.
This article presents Xide International's cross‑border e‑commerce data platform, detailing its multi‑layer business architecture, the scalability and data‑access problems encountered, and how a Protonbase‑driven data‑warehouse and micro‑service redesign dramatically improved query speed, operational efficiency, and cost.
The article explains how to prepare for interview "if" questions about Binlog loss by describing Flink CDC's binlog extraction principles, possible recovery mechanisms, and practical strategies such as resetting offsets, extending log retention, and building offline‑online reconciliation pipelines.
This article examines the concept, development trajectory, property rights, and monetization pathways of data assets, outlines a comprehensive data asset management framework, and proposes practical implementation plans to help enterprises unlock and capitalize on their data resources.
Facing petabyte‑level data, billions of small files, and the need for POSIX, S3, and HDFS compatibility, Didi designed a new generation of non‑structured storage—OrangeFS—by analyzing internal systems, combining multiple storage solutions, reusing GIFT technology, and implementing a high‑performance metadata service, multi‑protocol fusion, and robust scalability features.
This article details how Ctrip’s data platform evolved from a single‑IDC design to a multi‑IDC, tiered storage and scheduling architecture, covering the challenges of rapid data growth, the migration to Spark 3 via Kyuubi, the introduction of Celeborn shuffle service, and the resulting performance and reliability gains.
This article explores the evolution of data lakes for AI, discusses the challenges of AI-era data management, introduces Apache Iceberg and its architecture, demonstrates PyIceberg-based AI training and inference pipelines, and presents vector table designs with LSH indexing and performance optimizations.
This article explains the challenges of fragmented metric definitions, the benefits of a centralized indicator platform for unified management, agile development, high‑performance querying, and outlines the architecture, capabilities, construction process, and operational best practices to maximize data value.
This article explains Apache Hudi's clustering service, detailing its workflow, three execution modes, and layout optimization strategies—including linear, Z‑order, and Hilbert space‑filling curves—to improve storage locality and query performance in large‑scale data lake environments.
The article details Kuaishou's adoption of a data lake powered by Apache Hudi, covering the challenges of growing data warehouses, the migration from Hive to Hudi, concrete business case studies, promotion strategies, and key takeaways for large‑scale data engineering.
At the 2024 Data Intelligence Conference, ICBC's Big Data and AI Lab detailed the evolution of its data intelligence platform, covering architectural redesign, real‑time data warehouse technology, unified intelligent data tools, and future development directions to boost efficiency and innovation.
This article outlines the design, architecture, and practical applications of a quality inspection data collection system, covering data point structures, reporting mechanisms, compliance analysis, intelligent strategy iteration, and BI dashboards, illustrating how big‑data techniques enable digital transformation of inspection processes.
This article provides a comprehensive collection of free, unlimited-use API endpoints covering diverse services such as phone number lookup, historical events, stock data, weather forecasts, identity verification, jokes, maps, and many others, offering developers ready-to-use resources for building data-driven applications.
This article presents Kuaishou's comprehensive white‑box cost governance practice over the past year, detailing the data‑governance framework, engine and data‑warehouse white‑boxing techniques, compression algorithm replacement, HBO automatic tuning, operator analysis, and the resulting performance and cost benefits, as well as future plans.
This article explains how Hive serves as a data‑warehouse layer for user‑profile tagging, covering data‑warehouse fundamentals, fact‑and‑dimension modeling, partitioned storage, label aggregation, and ID‑mapping techniques with practical Hive DDL/DML examples.
This article presents Kuaishou's experience of designing and implementing a Doris‑driven lakehouse integrated analytics system, covering the current OLAP landscape, challenges of data duplication and governance, the new architecture with caching and auto‑materialization, implementation details, performance impact, and future work.
This article details the major memory model changes in Flink 1.11 for JobManager and TaskManager, compares them with Flink 1.9, provides concrete JVM command examples, explains the relationship between memory settings and parallelism, and introduces fine‑grained resource management for streaming workloads.
To achieve sub‑second, multi‑dimensional analytics on Bilibili’s hundred‑million‑row datasets, the team built a ClickHouse‑based acceleration layer that combines grouping‑set pre‑aggregation, bitmap (RBM) distinct handling, and a dense dictionary encoding service, dramatically cutting CPU, memory and query latency versus traditional OLAP pipelines.
This article details the FlinkSQL performance enhancements implemented by the streaming team, covering view reuse, redundant shuffle removal, multiple‑input operator redesign, long sliding‑window optimizations, and native JSON format improvements, which together deliver up to 60% CPU savings and massive core‑hour reductions.
This article shares a personal, experience‑driven overview of Apache Paimon, highlighting its design simplicity, key capabilities such as schema evolution, stream‑batch unified processing, primary‑key support, and closed‑loop data handling, while discussing when its features are appropriate for production environments.
This article introduces Apache Hudi's table services, explaining the concepts, execution modes, and detailed workflows of compaction, cleaning, and indexing, and how they optimize storage layout and read/write performance in large‑scale data lake environments.
This article walks through the One Billion Row Challenge, explaining the problem, baseline solution, and a series of performance optimizations—from JVM selection and parallel I/O to custom hash tables, unsafe memory access, and SIMD techniques—that shrink execution time from minutes to under two seconds.
This article introduces the AnalyticDB Spark architecture, explains the need for Spark vectorization, surveys industry vectorized solutions, details ADB Spark's own vectorized implementation with Gluten and Velox, and presents performance test results showing a 6.98‑fold speedup over open‑source Spark.
This article explains the Lambda architecture—a three‑layer model combining batch and real‑time processing for large‑scale data, outlines its components, advantages, disadvantages, common tools, and compares it with the Kappa alternative while providing practical insights for data engineers.
This article provides a comprehensive overview of Elasticsearch, covering its distributed storage architecture, core data model concepts, analysis and query capabilities, practical next‑token pagination techniques, join strategies, and various data synchronization methods for integrating Elasticsearch with other systems.
This article explains how large language models (LLMs) can launch data democratization by constructing a metric platform that combines LLM agents, semantic layers, NL2SQL/NL2API pipelines, warehouse‑internal and external semantics, and showcases SwiftAgent/SwiftMetrics innovations, real‑world case studies, and future directions.
This article explains the concept, value, three‑layer architecture, and practical implementations of a data middle platform, illustrating how it standardizes data, forms a middle‑office organization, and drives cost‑effective business empowerment through examples from Alibaba, NetEase, and other enterprises.
This article shares Xiaomi's experience building a next‑generation one‑stop data development platform on Spark 3.1, covering typical challenges such as Multiple Catalog implementation, Hive‑SQL to Spark‑SQL migration, offline Spark performance and stability optimizations, and future roadmap plans.
This article presents Qichacha's comprehensive data‑cost‑reduction strategy, detailing its Hadoop‑based three‑pillar architecture, layered data warehouse, Hive upgrades, unified metadata across multi‑cloud clusters, middleware choices such as Alluxio and JuiceFS, version‑compatible hybrid clouds, and Kubernetes‑driven resource orchestration to achieve scalable, low‑cost data processing.
This article details Bilibili's transformation of its search offline indexing pipeline, moving from manual MySQL‑based processes to a high‑capacity, distributed KV store and Spark‑driven builds, addressing performance, maintenance, and scalability challenges while improving resource efficiency and iteration speed.
This article summarizes Alibaba Cloud researcher Xu Sheng's presentation on the company's big data and AI product portfolio, covering current offerings, market trends, lakehouse evolution, open‑source contributions, serverless solutions, search capabilities, and the future roadmap for integrated big data‑AI services.
This article examines the challenges of Hudi metadata stored on HDFS, introduces the independently developed Hudi MetaServer for centralized metadata, visual management, unified permission control, TTL, expression payloads, and multi‑active scaling, and outlines future enhancements such as LLS, multi‑table fusion, and JDBC support.
This article outlines practical production‑level optimizations for Apache Doris compaction, covering vertical, segment, and single‑replica compaction methods, compaction policies, concurrency controls, and data‑ingestion tuning to improve import speed and query performance in OLAP workloads.
This article introduces Baidu's log platform that handles billions of daily events, explains UBC logging concepts and monitoring requirements, and details a low‑cost, high‑accuracy architecture using real‑time streaming, dimension mapping, watermarking, and time‑window aggregation to achieve reliable, scalable event monitoring.
This article presents a comprehensive overview of Xiaomi's sales data warehouse, detailing its development history, dimensional modeling theory, multi‑layer architecture, Lambda design with batch and streaming processing, capability layers, security measures, and answers to common technical questions.
This article presents a comprehensive overview of Ant Group's metric system, covering its definition, three-layer architecture, common challenges, concept consensus methods, semantic layer options, mechanism design, productization capabilities, platform improvements, business outcomes, future directions, and a detailed Q&A session.
This article introduces cuDF, a Python GPU DataFrame library with a pandas‑like API, compares it to pandas, explains when to use cuDF versus Dask‑cuDF for single‑GPU or multi‑GPU workloads, and provides practical code examples for common data operations.
This article details Haijing Technology's challenges with real‑time telecom data analysis, explains why traditional Hadoop and ClickHouse solutions fell short, and shows how ByConity's unified engine, multi‑table joins, and elastic scaling enable efficient, low‑latency analytics across complex B‑O‑M domains.
This guide details a step‑by‑step migration plan for HBase and HDFS clusters, covering background, high‑availability architecture, role assignments, expansion and shrinkage of ZooKeeper and JournalNode, NameNode and DataNode migration, rolling restarts, and common upgrade pitfalls.
This article details how a SaaS CRM provider built a cloud‑native Lakehouse platform to support multi‑tenant real‑time analytics, describing data challenges, metadata‑driven architecture, virtual database design, query optimization, BI integration, AI readiness, migration steps, and the resulting performance and scalability gains.
IDC’s 2024 MarketScape report shows Alibaba Cloud topping the Chinese real‑time lakehouse market, highlighting the growing demand for integrated, low‑cost, minute‑level fresh data solutions that combine big‑data, AI, and multi‑engine analytics.
This article presents a comprehensive overview of Meta's open‑source Velox query execution engine, detailing its architecture, vectorized execution model, memory‑pool hierarchy, arbitrator and allocator designs, spilling techniques, and future development plans for large‑scale data processing.
This article details Alibaba Cloud's end‑to‑end architecture for search and advertising recommendation, covering the data platform, AI services, feature‑store design, training and inference optimizations, and the integration of large language models for new recommendation scenarios.
The article reviews Apache Flink 1.20, highlighting the new Materialized Table concept, the DISTRIBUTED BY support for load‑balanced storage and join performance, and state/checkpoint file merging improvements, while providing code examples and practical insights for users.
This article explains Apache Hudi’s write‑side indexing, detailing the indexing API, various index types—including simple, Bloom, bucket, HBase, and record‑level indexes—and their mechanisms, helping readers understand how Hudi validates record existence and optimizes updates and deletions.
This article explains the complete Apache Hudi write pipeline, detailing each step from client creation to commit, and describes the various write operations such as Upsert, Insert, Bulk Insert, Delete, Delete Partition, and Insert‑Overwrite, providing a comprehensive overview for data‑lake practitioners.
Haijing Technology faced Hadoop's real‑time limits and ClickHouse's operational pain points, so it adopted the open‑source ByConity platform, which provides a unified table engine, fast multi‑table joins, and seamless scaling to deliver a carrier‑grade real‑time analytics solution.
This presentation details Alibaba Cloud's AI platform, covering the end‑to‑end pipeline from big‑data processing and feature engineering to large‑model training, inference optimization, recommendation system architecture, and RAG applications, highlighting practical engineering solutions and performance gains.
This article provides a comprehensive overview of Apache Spark SQL, covering its fundamental concepts such as TreeNode, AST, and QueryPlan, the distinction between logical and physical plans, the rule‑execution framework, core components like SparkSqlParser and Analyzer, as well as the Spark Session, Dataset/DataFrame, and various writer APIs, supplemented by a detailed Q&A session.
This guide details how to use Alibaba Cloud ACK Fluid to accelerate data access, improve system stability, and ensure cache consistency across AI, big‑data, and analytics workloads by selecting appropriate ECS instances, cache media, scheduling affinity, and runtime configurations.
Kingsoft Office migrated its reporting platform from a multi‑engine stack to StarRocks 3.0, achieving a 48.84% performance gain, halving query latency, reducing operational costs, and improving resource utilization while supporting storage‑compute separation and seamless Trino SQL compatibility.
This article introduces Tencent's Big Data Processing Suite (TBDS) and the open‑source Gravitino project, explaining how they provide a unified metadata service and a comprehensive, extensible permission model to address data and permission islands across heterogeneous Hadoop and MPP ecosystems.
This article explains the concept, design principles, and core components of a data middle platform, detailing its overall, functional, layered, logical, and data architectures, as well as the specific platforms for data collection, processing, organization, governance, quality, sharing, and visualization, illustrated with diagrams.
This technical report details the background, architecture, construction, core issues, migration plans, and future roadmap of moving 58's HBase clusters to a cloud‑native environment, highlighting cost reduction, operational automation, and performance optimizations.
This article presents Kuaishou's metric middle platform, detailing its background, design principles, metric management and service architecture, including headless BI concepts, unified analysis language OAX, query engine OCTO, data modeling layers, acceleration strategies, and future directions toward intelligence and high performance.
This article provides a comprehensive overview of object storage, covering its origins, historical development, fundamental operations, key advantages over block and file storage, major application scenarios, and predicted future trends in cloud and big‑data environments.
This article explores how power‑law and other heavy‑tailed distributions appear in content ecosystems, explains their statistical foundations, discusses why they are common, and presents data‑driven strategies—including integer programming, graph‑based creator analysis, and causal inference—to optimize content production, recommendation, and settlement policies.
This article provides a comprehensive overview of Apache Doris, explaining its frontend and backend nodes, storage structures such as tablets, rowsets, and segments, replication mechanisms, partitioning versus bucketing, indexing types, compaction processes, and high‑availability strategies through a detailed Q&A format.
This article explains Paimon's core concepts—including snapshots, partitions, buckets, consistency guarantees, file layout, LSM‑tree organization, and compaction strategies—while also covering table management tasks such as snapshot expiration, rollback, partition expiration, and small‑file mitigation techniques.
The article examines the rapid rise of lakehouse architecture, its market momentum, core components—including storage, metadata, table formats, and compute layers—compares Iceberg, Hudi, and Delta Lake, discusses the shift from HDFS to object storage, and outlines the strategic importance of lakehouses for AI-driven data management and future data infrastructure trends.
This case study details how Qunar’s engineering team analyzed and resolved severe Kafka production bottlenecks during peak traffic by adding targeted monitoring, tuning thread and filebeat parameters, and validating changes through gray‑scale tests, ultimately saving 2000 CPU cores across three clusters.
This article presents Xiaohongshu's multi‑cloud unified data acceleration layer built with Alluxio, detailing the challenges of multi‑cloud architectures, the design goals, Alluxio's architecture and features, real‑world case studies in AI training and recommendation indexing, performance improvements, and future plans.
This article shares detailed practical experiences from DingXiangYuan's big‑data platform on using Apache Kyuubi and Apache Celeborn, covering architecture, flexible configuration, AuthZ fine‑grained permissions, small‑file and Z‑Order optimizations, Arrow‑based large result transmission, and operational tips such as connection‑level issues and Netty cache handling.
This article examines JD's self‑developed Buffalo distributed workflow scheduling system for big‑data ETL, detailing its two‑layer entity model, instance‑based scheduling, high‑availability three‑layer architecture, performance optimizations, cold‑hot data separation, and open APIs to support massive, complex data pipelines.
This article provides an in‑depth overview of Apache Kafka, covering its use cases, comparison with other message queues, versioning, performance mechanisms, core concepts such as topics, partitions, offsets, consumer groups, rebalancing, replication, leader election, idempotence, transactions, compression, interceptors, request handling, and practical configuration tips for reliable streaming applications.
This guide walks you through creating a Kafka‑enabled EMR Serverless Spark cluster, configuring network connections and security groups, uploading JARs and Python resources, and finally launching and monitoring a PySpark streaming application.
This article introduces the fundamentals of distributed computing, compares major frameworks such as Hadoop, Spark, and Flink, and outlines their key components, performance characteristics, and typical application scenarios including big‑data analytics, cloud services, real‑time streaming, and scientific computing.
Twitter migrated from a Lambda-based dual‑pipeline system to a Kappa architecture that relies on a single real‑time stream using Kafka, Google Pub/Sub, Dataflow, and BigTable, dramatically reducing latency, increasing throughput, and improving data accuracy for processing billions of daily events.
This article examines Douyin Group's e‑commerce data‑tracking journey, detailing the progression from early log collection to Log 3.0, the challenges posed by rapidly evolving user flows, and the comprehensive solution framework—including BTM/BCM management, SDK capabilities, and an attribution platform—that improves data quality, development efficiency, and attribution accuracy.
Blaze is Kuaishou's self‑developed native execution engine that leverages Rust, DataFusion, and SIMD vectorization to accelerate Spark workloads, offering a 30%+ compute boost, detailed architectural components, deep production‑grade optimizations, and a roadmap for broader adoption.
This article explains how combining Flink with Hologres creates a unified, real‑time streaming warehouse, detailing traditional layering approaches, the advantages of the Hologres‑based solution, core capabilities like Binlog and resource isolation, and a practical e‑commerce case study demonstrating performance gains.
This article explains how to construct a full‑chain data lineage system, covering its overall architecture, quality measurement framework, and application layer, and demonstrates practical use cases such as handling data growth, monitoring warehouse changes, accelerating development, ensuring consistency, and automating metric decomposition in real‑world business scenarios.
This article outlines the step‑by‑step evolution of Baidu's Feed data warehouse—from traditional layered modeling to hour‑level core tables, then real‑time wide tables, and finally a flow‑batch integrated multi‑version wide‑table architecture—highlighting the motivations, design choices, challenges, and resulting benefits.
This article provides a comprehensive overview of Apache Spark, covering its origins, key characteristics, core concepts such as RDD, DAG, partitioning and dependencies, the internal architecture including SparkConf, SparkContext, SparkEnv, storage and scheduling systems, as well as deployment models and the company behind the product.
This article introduces the open‑source Python package TransBigData, explains how to install it, and demonstrates step‑by‑step methods for reading mobile signaling data, preprocessing, identifying stays and moves, extracting home and work locations, and visualizing individual activity patterns using Jupyter notebooks.
An insider reveals that Gaode Maps' traffic‑light countdown and green‑wave speed suggestions are generated by a proprietary algorithm—supported by a recent patent—rather than direct real‑time signal data, highlighting the role of big‑data analytics in modern navigation.
This article introduces Apache SeaTunnel, a modern data integration platform designed for the EtLT era, detailing its architecture, core connector APIs, checkpoint mechanism, model inference, multi‑table synchronization, the high‑performance SeaTunnel Zeta engine, OLAP use cases, community roadmap, and the commercial WhaleTunnel product.
This article explains why a comprehensive data asset catalog is essential for modern enterprises, outlines its core components such as inventory, metadata, data lineage, standards and access control, details step‑by‑step construction methods, and highlights key applications in governance, quality, compliance, architecture and valuation.
This article explains the concept, advantages, and drawbacks of materialized views, describes how MaxCompute implements them—including creation syntax, maintenance properties, automatic query rewrite, smart recommendation, and auto‑materialization—and shares performance results and future improvement plans.
This article examines the critical role of shuffle in big‑data processing, compares Spark's native shuffle with the External Shuffle Service (ESS) and Remote Shuffle Service (RSS) solutions, introduces Uniffle's architecture and configuration, and shares practical deployment experiences and performance results within a 360 internal environment.
This article outlines the digital transformation of retail supply chains, detailing the challenges faced, the layered architecture for data integration, the role of a supply‑chain control tower with AI‑driven capabilities, and the emergence of data‑centric supply‑chain finance solutions.
This article presents a practical overview of StarRocks and Apache Paimon data‑lake capabilities, explains their performance advantages, details migration strategies from Trino/Presto and other engines, describes cluster‑to‑cluster migration, and outlines future roadmap for integration and optimization.
The two‑day DataFunCon 2024 Beijing conference gathered hundreds of big‑data and AI experts to discuss the evolution from data lakes to lake‑warehouses, large‑model development, practical applications, and future strategies for enterprises, while showcasing partner exhibitions and a vibrant community spirit.
The DataFunCon 2024 Beijing conference opened with keynote speeches on the evolution of Alibaba Cloud's big data platform, explored distributed data warehousing, large model research, and practical AI applications, and concluded with a round‑table discussing future trends and enterprise strategies for big data and AI integration.
RiskFactor unifies iQIYI’s legacy real‑time and offline feature platforms onto Opal’s DAG‑plus‑SQL engine, accelerating feature production fifteen‑fold, cutting latency from hours to minutes, streamlining development, lowering costs, and delivering more reliable, versioned risk‑control capabilities against sophisticated online threats.
This article examines the growing challenges of data management—such as asset discoverability, architectural rigidity, development quality, and rising resource costs—and presents a comprehensive data‑governance framework that leverages standards, agile architecture, development isolation, and active‑metadata‑driven lifecycle evaluation to improve efficiency, reduce expenses, and enable intelligent, automated data back‑filling.
This article explains how to construct a financial indicator system and its underlying data warehouse using FineBI, covering metric hierarchy design, ODS/DWD/DWS/ADS layers, AI‑enhanced BI analysis, and practical tips for organizational adoption and governance.
This article details the design and implementation of a high‑availability, real‑time logistics supply‑chain dashboard, covering Flink‑based data pipelines, ClickHouse OLAP storage, metric consistency, stability measures, extensible configuration, and comprehensive monitoring to ensure accurate, scalable performance during major promotions.
This article explains a distributed‑computing approach for generating a globally unique integer index from massive string datasets, replacing single‑reducer sorting with hash‑bucket partitioning and parallel processing to cut runtime from 30 minutes to just 2 minutes.
StarRocks 3.3 introduces a comprehensive set of enhancements—including maturity levels, ARM‑optimized performance, advanced caching, materialized‑view rewrites, storage optimizations, and expanded lakehouse ecosystem support—that together boost stability, query speed, and usability for large‑scale analytics workloads.
The forum presents a series of technical talks on multi‑cloud data architecture, covering Xiaomi’s lake‑warehouse practice, cross‑border e‑commerce data platforms, Alluxio‑based machine‑learning acceleration, Qichacha’s cost‑effective data solutions, and Kuaishou’s Flink on Kubernetes migration, highlighting strategies, implementations, and audience benefits.
This article presents the design and implementation of a high‑availability, real‑time logistics supply‑chain monitoring dashboard, covering its data processing pipeline with Flink, storage choices between Elasticsearch and ClickHouse, multi‑layer architecture, metric consistency, stability mechanisms, extensibility configurations, and monitoring practices.
This article defines distributed storage, presents China's market size and growth rates from 2021 to 2022, breaks down the market into file, block, and object segments, highlights the top adopting industries, and outlines nine key application scenarios driving rapid expansion.
The article presents a comprehensive case study of XinXuan Group’s data ecosystem, detailing its business background, data platform construction, governance framework, technical architecture, and practical analytics applications that support live‑commerce operations and strategic decision‑making.
This article explains how Apache Hudi integrates with Spark to read data, detailing the Spark‑SQL planning stages, the Spark‑Hudi read workflow, and the four main Hudi query types—snapshot, read‑optimized, time‑travel, and incremental—along with example SQL commands and code snippets.
