This article explains Flink’s three‑layer architecture (APIs & Libraries, Core, Deploy), details its programming interfaces, runtime engine, deployment options, and core concepts such as stateful computation and time semantics, providing a comprehensive guide for building robust stream and batch applications.
This article introduces a universal method for building a real-time data warehouse at Meituan Waimai, covering streaming technologies, architecture choices such as Lambda and Kappa, component design, feature production, SLA management, and practical OLAP solutions using Flink, Storm, and Doris.
This guide walks through setting up Kafka Streams with Spring Boot 2.3, covering environment configuration, core concepts, topology design, and multiple practical examples—including message sending, listening, transformations, aggregations, filtering, branching, and multi‑field grouping—complete with full code snippets and execution results.
Volcengine’s Data Quality Platform bridges the gap between data validation and resource‑intensive computation in large‑scale environments, offering unified stream‑batch monitoring, data exploration, comparison, and alerting across Hive, ClickHouse, Kafka, and more, while addressing scalability, latency, and resource optimization challenges.
This article provides a comprehensive guide to building a large file chunked upload library from scratch using TypeScript, detailing both server-side stream processing for memory efficiency and client-side MD5 calculation with retry mechanisms to ensure reliable and performant file transfers.
This article reviews the Pravega project and its Flink connector, covering Pravega's design for large‑scale streaming, the connector's evolution and exact‑once semantics, Flink 1.11 integration challenges, checkpoint mechanisms, and future plans such as schema‑registry and new Flink features.
To meet Xianyu’s billion‑event‑per‑day real‑time analysis needs, the team built a petabyte‑scale warehouse using Hologres for storage and Alibaba‑enhanced Flink (Blink) for streaming, organized into ODS, DWD, DWS, ADS and DIM layers, enabling minute‑level aggregations, rapid anomaly detection, and instant product‑team insights.
The team automated Baidu Search fault diagnosis by building a side‑index for instant log lookup, streaming incremental analysis, exhaustive rule templates, feature‑engineering pipelines, query‑scene reconstruction, entropy‑based ranking, per‑second timeline views, and chaos‑engineered fault injection, achieving near‑99% accuracy and second‑level, module‑granular stability tracing.
Apache Pulsar 2.8.0 introduces transaction support, featuring a Transaction Coordinator, Transaction Buffer, Transaction Log, Transaction ID, and Pending Acknowledge State, with a detailed workflow that ensures exactly‑once semantics for stream processing, contrasting its design with Kafka’s approach.
This article details how Yuedu Group designed and implemented an overseas big data platform, covering overall system architecture, offline data‑warehouse construction with dimensional modeling, real‑time streaming using Oceanus and ClickHouse, and future plans for cost reduction and data quality assurance.
This article explains how NetEase Cloud Communication designed and implemented a Flink‑based streaming aggregation framework that processes massive heartbeat logs in real time, handles data skew with two‑stage aggregation, and outputs metrics to Kafka and InfluxDB for monitoring and alerting.
This article details how Lakala built a distributed, cloud‑native messaging platform using Apache Pulsar, covering functional requirements, architectural advantages, performance testing, and real‑world integration scenarios such as OGG adapters, TiDB pipelines, OpenMessaging, custom sources, functions, Flink connectors, and future plans.
The article presents a real‑time quantile solution using the TDigest data structure, which clusters data into centroids and stores digests in Redis or Doris, pre‑computes quantiles for all dimension combinations, and provides a reusable API that delivers fast, accurate, low‑memory quantile statistics for diverse business scenarios.
Flink 1.13 introduces passive scaling that lets users adjust parallelism to resize jobs, adds visual tools such as load/back‑pressure charts, CPU flame graphs, and state‑backend metrics for deeper performance insight, and includes numerous community optimizations for easier upgrades and operation.
The Imazon platform unifies Baidu’s image acquisition, feature extraction, and ANN‑based multimodal retrieval into a cloud‑native, real‑time pipeline that ingests billions of images daily, optimizes storage and GPU usage, reduces message‑queue costs, and ensures high‑throughput, low‑latency search across text, visual, and voice queries.
Jet, an open‑source in‑memory distributed batch and stream processing engine, introduces dynamic ClassDefinition for SQL, JDBC sink batch size option, SQL aggregation memory optimizations, improved sliding‑window pickAny performance, numerous extension updates, critical bug fixes, and a major API change to DAG.toDotString for enhanced parallelism control.
This article shares ten practical pitfalls encountered when moving hourly Spark session jobs to Flink, covering parallelism load imbalance, state TTL, checkpointing strategies, logging, JMX debugging, state migration risks, reduce vs process choices, input data validation, event‑time handling, and external storage considerations, along with concrete configuration snippets and performance tips.
This article presents the evolution, architecture, and key innovations of Bigo's real‑time computing platform—covering its migration from Spark Streaming to Flink, unified platform design, development tools, operational enhancements, and the efficiency gains achieved in business scenarios such as ETL and AB‑testing.
The article examines the key challenges of real‑time data aggregation—data freshness, timely processing, and result visibility—and surveys common solutions such as timestamp‑based sync, CDC, full and incremental computation, storage formats, and trigger mechanisms.
This article explains how to implement dynamic data partitioning in Apache Flink using a fraud‑detection demo, covering the system architecture, rule‑driven runtime reconfiguration, custom ProcessFunction code, and the underlying key‑by logic that enables flexible, real‑time stream processing.
This talk by Ba Xueyu, a senior big data platform engineer at Zhongyuan Bank, outlines the background, architecture, and engineering practices of a real‑time financial data lake, highlighting its open, timely, and integrated design, streaming platform implementation, and use cases such as anti‑fraud and real‑time BI.
In 2020, Apache Flink surged to become the most active Apache project, releasing three major versions that advanced its unified stream‑batch engine, introduced cloud‑native K8s support, expanded AI capabilities with PyFlink, and fostered a thriving Chinese community, solidifying its role as the de‑facto standard for real‑time computing.
This article explains the purpose, semantics, and design of Apache Kafka’s transaction API, detailing how it enables exactly‑once processing for stream‑processing applications, the role of transaction coordinators and logs, Java API usage, performance considerations, and best‑practice guidance.
The 2020 Flink Forward Asia conference showcased Apache Flink's rapid growth, community milestones, industry adoption, and technical breakthroughs such as unaligned checkpoints, approximate failover, the Nexmark benchmark, stream‑batch unification, AI integration via PyFlink and Alink, and deep cloud‑native support on Kubernetes, illustrated through case studies from Alibaba, Meituan, Kuaishou, and Dell.
This article explains how to leverage Flinkx and Flink Stream API to create a unified data‑sync task that extracts data from sharded MySQL tables, splits the workload, and pushes it to an MQ cluster, while detailing the underlying InputFormat and Reader architecture.
The author shares his personal journey from first encountering Flink to becoming an Apache Flink Committer at ByteDance, detailing community involvement, code contributions, bug fixes, lessons learned, advice for newcomers, and concluding with promotional offers for Flink services.
The Omega real‑time reach system uses a custom DSL that unifies input data, standardizes CEP APIs, and leverages an Antlr V4‑based translation framework to generate Python, C++, JavaScript, and Java code for cloud, edge, and front‑end containers, cutting rule development from days to minutes.
Alibaba’s 2020 Double‑11 achieved unprecedented real‑time processing of 4 billion records per second and 7 TB of data per second using Flink, showcasing the stability, performance and efficiency of its stream‑batch unified architecture across diverse business scenarios.
This article details Didi’s end‑to‑end construction of a real‑time data warehouse for the Ride‑Sharing (顺风车) business, covering motivations, layer‑by‑layer architecture, naming conventions, StreamSQL capabilities, operational tooling, achieved results, challenges, and future batch‑stream integration plans.
This article provides a comprehensive overview of modern real‑time big‑data solutions, detailing Spark Structured Streaming capabilities, CarbonData’s storage architecture, Meituan’s Flink deployments, and Huawei Cloud Stream’s unified streaming service, highlighting their features, challenges, and future directions.
This article describes ByteDance's single‑task recovery solution for Flink's real‑time computation, detailing the problem of global job restarts, the proposed network‑layer enhancements, upstream and downstream optimizations, JobManager restart strategy, implementation challenges, and the measurable latency and availability benefits achieved in production.
This article examines the challenges of existing stream‑processing benchmarks, introduces the open‑source Nexmark framework designed for reproducible, comprehensive performance testing, describes its metrics, query set, workload configurability, and presents experimental results on Flink, highlighting its role in advancing big‑data stream benchmarking.
This article explains why Flink is chosen for online sample generation, describes the end‑to‑end implementation steps—including stream union, state‑timer processing, and output formatting—covers state backend choices, monitoring, validation, fault handling, and platformization for scalable real‑time machine‑learning pipelines.
This article details the technical architecture of a Real‑time Data Platform (RTDP), covering component selection such as DBus, Kafka, Wormhole, Moonbox and Davinci, and discusses design considerations, data management, security, operational practices, and various deployment modes for big‑data applications.
This article explores the evolution from traditional to modern data warehouses, outlines the key capabilities of real‑time data platforms such as data real‑time, virtualization, democratization and collaboration, and presents a comprehensive architecture design with unified collection, streaming, compute and visualization layers, while discussing functional, quality, stability, cost, agility and management considerations.
To support Didi’s fast‑growing car‑pool service, a real‑time data warehouse was built using a streamlined layered architecture—ODS, DWD, DIM, DWM, and APP—leveraging Flink‑based StreamSQL, Kafka, Druid and ClickHouse to deliver minute‑level analytics, dashboards, monitoring, and cross‑business interfaces while planning unified meta‑store integration.
This article introduces Confluent KSQL, a SQL‑based real‑time stream processing engine for Kafka, covering its architecture, stream vs table concepts, query lifecycle, Docker‑based setup, DDL commands, example joins, windowed aggregations, connectors, and its advantages and limitations.
This article explains the evolution of Apache Flink's SQL support, detailing the Blink Planner architecture, the end‑to‑end Flink SQL workflow, logical and physical planning, code generation, stream‑specific optimizations such as retraction and mini‑batch, and future development directions.
Youzan created an internal A/B testing platform—combining Java/Node SDKs, a real‑time data pipeline, and a metadata‑driven workflow—to enable data‑driven product iteration, granular traffic allocation, automated logging, statistical analysis, and scalable growth insights across its merchant services, while planning further automation and integration.
Apache Flink 1.11.0, released after four months of development, brings major ecosystem, usability, and stability improvements—including CDC support, a new JDBC catalog, real‑time Hive integration, a redesigned source API, PyFlink enhancements, application mode for Kubernetes, and checkpoint optimizations—while highlighting the growing contribution of Chinese developers.
This article details NetEase's evolution from Storm to Flink for real‑time computing, describing the Sloth platform's architecture, large‑scale deployment, diverse business scenarios, monitoring, alerting, and future development plans, illustrating how Flink powers data synchronization, real‑time warehousing, and e‑commerce analytics and recommendation.
Apache Flink 1.11.0 introduces a suite of major enhancements—including unaligned checkpoints, a unified source interface, CDC support in Table API/SQL, performance‑boosted PyFlink, a new application deployment mode, and numerous UI, Docker, and catalog improvements—aimed at increasing usability, scalability, and integration across streaming and batch workloads.
This article explains Apache Flink's distributed system architecture—including JobManager, ResourceManager, TaskManager, and Dispatcher—covers session and job deployment modes, data transfer mechanisms, event‑time handling with watermarks, various state types and backends, scaling strategies, and the checkpoint/savepoint recovery process.
This article details the evolution of 58 Tongcheng Bao's real‑time data warehouse, describing the initial Spark‑Streaming architecture, its limitations, and the redesign using Flink with a layered ODS‑DWD‑DWS‑APP model, data‑quality monitoring, join techniques, and the resulting improvements in latency and accuracy.
The article provides a comprehensive overview of Apache Flink 1.11, detailing enhancements in cluster deployment, resource management, source/sink APIs, state backends, Table & SQL improvements, DataStream extensions, PyFlink/ML support, and runtime optimizations, along with relevant code examples and references.
This article examines the design of a real‑time data platform, discussing its background concepts, modern data‑warehouse perspective, architectural layers, unified data‑collection, streaming, compute and visualization platforms, and the functional, quality, stability, cost and agility considerations required for building an end‑to‑end real‑time pipeline.
This article provides a comprehensive overview of Apache Flink, explaining how it unifies stream and batch processing on a single runtime, detailing its key features, APIs, libraries, architectural components, fault‑tolerance mechanisms, scheduling, iterative processing, and back‑pressure monitoring.
OPPO's ESA DataFlow is a self‑developed high‑performance data‑flow framework that processes over a trillion events per day, offering flexible routing, scalable sources and sinks, persistent mmap‑based channels, built‑in monitoring, and easy extensibility for diverse data‑collection scenarios.
Apache Flink 1.10 introduces a major upgrade that merges the Blink engine, boosts performance and stability, adds native Kubernetes support, enhances SQL DDL, delivers production‑ready Hive batch compatibility, optimizes memory management, and expands Python UDF capabilities, with detailed feature breakdowns and code examples.
This article explains how Apache Flink uses event‑time timestamps and watermarks to handle out‑of‑order and late data, describes the assignTimestampsAndWatermarks API with periodic and punctuated watermark assigners, and provides practical code examples for window lateness and side‑output handling.
Apache Flink 1.10 introduces major performance and stability improvements, unified memory configuration, native Kubernetes session mode, enhanced Table API/SQL with production‑ready Hive integration, expanded Python UDF support, and a host of important bug fixes and connector updates, marking the largest community‑driven release to date.
The article describes Ctrip's Prophet platform, which combines Flink real‑time stream processing with TensorFlow deep‑learning models to provide intelligent, low‑latency anomaly detection, replacing traditional rule‑based alerts and addressing challenges such as holiday traffic and model scalability.
This article explains how Alibaba 1688 achieves real‑time recommendation, advertising, and product statistics through a robust middle‑platform foundation, streaming engines like Blink, data synchronization tools, and scalable storage, illustrating three concrete engineering cases and the end‑to‑end real‑time data service pipeline.
This article explains the architecture of a Flink cluster, detailing the startup procedures for JobManager and TaskManager, the three deployment modes, and the end‑to‑end flow of a Flink job from client code through StreamGraph, JobGraph, ExecutionGraph to the physical execution on TaskManagers.
The article surveys modern big‑data architecture, contrasting Lambda and Kappa models, highlights common governance and integration pain points, and proposes an end‑to‑end platform featuring unified metadata, stream‑batch processing, one‑click ingestion, standardized modeling, intelligent query abstraction, and a comprehensive development IDE.
This article explains Flink's sliding window mechanism, shows how the WindowAssigner and WindowOperator work with code examples, analyzes the performance impact of fine‑grained sliding windows, and proposes a practical workaround using tumbling windows combined with external storage such as Redis for efficient PV/UV aggregation.
Apache Flink, the open‑source stream‑and‑batch processing engine, has surged to become one of the most active Apache projects, with rapid community growth in China, unified SQL capabilities, AI‑focused extensions, Kubernetes integration, and benchmark results that outperform Hive by up to seven times.
This article provides an in‑depth Flink interview guide covering the framework’s core concepts, advanced features such as fault‑tolerance, state management, and checkpointing, as well as detailed explanations of its architecture, APIs, partitioning strategies, and source‑code flow, complete with code examples.
The Omega system’s User Reach Center integrates a behavior‑collection hub, a Flink‑based CEP rule engine, and a plug‑in‑driven reach module that routes, filters, and dispatches actions via push, SMS or external calls, delivering sub‑second targeting, higher accuracy, reduced development effort, and plans for offline profiling and data‑loop closure.
This article explains the background, source‑code analysis, and practical implementation of Flink's LatencyMarker feature for measuring end‑to‑end job latency, including metric exposure, configuration options, and code snippets illustrating how latency markers are emitted and processed within the streaming pipeline.
The Xianyu team built a data‑driven system that monitors seller online status and reply speed, uses Siddhi CEP to match behavior patterns, and orchestrates activities, tasks, and synchronization modules, boosting conversion by three percentage points and allowing new scenarios to launch without developer effort.
The article examines how Apache Flink's state management features, including QueryableState and the upcoming Savepoint Processor API, can serve as a lightweight database for real‑time applications, discussing their advantages, limitations, and practical usage scenarios.
The article details Xianyu’s real‑time complex event processing system, which abstracts diverse business scenarios—such as activity coupons, price‑drop alerts, rental suggestions, and promotional offers—into a rule‑driven pipeline comprising log collection, a Blink‑based DSL EPL engine, and configurable result delivery, enabling feature rollout in half a day with ~10‑second latency.
This article explains Flink's checkpoint mechanism, its execution flow, common configuration options, and the benefits and considerations of incremental checkpoints using the RocksDB state backend, providing practical code examples and YAML settings for reliable stream processing.
This guide provides a detailed overview of Apache Flink covering its core streaming engine, APIs (DataSet, DataStream, Table), architectural components, comparison with Spark Streaming, partitioning, parallelism, restart strategies, state backends, time semantics, watermarks, SQL processing, fault‑tolerance mechanisms, memory management, serialization, RPC framework, back‑pressure handling, operator chaining, and practical tips for interview preparation.
This article explores the two toughest problems in distributed stream processing—exactly‑once message handling and ordering—by dissecting the underlying impossibility of perfect failure detectors, the liveness‑vs‑safety trade‑off, zombie processes, and the practical solutions employed by systems such as Flink, Kafka Streams, MillWheel, and Spark.
This article explains how Flink CEP, a complex event processing library for Apache Flink, is employed at Haolo Mobility to detect intricate patterns in endless data streams by modeling patterns as states and using pattern conditions for state transitions, illustrating its practical application in real‑world big‑data scenarios.
This article compiles a curated list of the most reliable and official Apache Flink learning materials—including beginner tutorials, source‑code walkthroughs, advanced topics, community articles, real‑world case studies, and downloadable resources—providing a one‑stop reference for developers and researchers interested in stream processing and big‑data analytics.
This article explains how Mogu’s advertising system designs and evolves a real‑time data pipeline—covering merchant and operation needs, data collection, cleaning, processing with Storm, Flink, and Kylin, and service guarantees—to enable high‑quality, low‑latency analytics for advertisers and the platform.
The article details how Kuaishou leverages Apache Flink for large‑scale stream processing, describing its application scenarios, cluster sizing, interval join optimization, RocksDB performance challenges, source throttling strategies, JobManager stability, frequent job failures, and platform‑wide improvements.
This article describes the motivation, technology selection, implementation details, and practical challenges of building a real‑time data warehouse using Flink, covering stream ingestion, data cleaning, dimension‑table joins, state backend choices, and operational lessons for large‑scale streaming pipelines.
This article examines Flink’s industrial‑scale network stack, detailing the credit‑based flow control introduced in version 1.5, the refactored task‑IO thread collaboration, and serialization optimizations that together improve throughput and latency for large‑scale stream processing workloads.
This article analyzes the difficulties of achieving exactly-once delivery in Apache Flink, explains the distinction between state and end‑to‑end exactly‑once, and details how Flink implements exactly‑once sinks using idempotent and transactional approaches, including a Bucketing File Sink example.
This article explains why the author chose Apache Flink for real‑time stream processing, highlighting its unique combination of high throughput, low latency, event‑time support, stateful computation, flexible windows, and fault tolerance, while also reflecting on the challenges of adopting a less‑documented technology.
The Ziru IM project uses Apache Flink to monitor real-time conversation metrics such as timely reply rates, average session duration, and message counts, employing two dialogue models and session definitions to enhance service quality and operational insight within an in‑app communication platform.
This article explains how to register scalar UDFs, table‑valued UDTFs, and aggregate UDAFs in Apache Flink, illustrates typical compilation and runtime pitfalls with concrete Scala code examples, and provides corrected implementations and best‑practice tips for reliable function registration.
This article explains how Apache Pulsar and Apache Flink can be combined to provide a unified, scalable, and fault‑tolerant data processing platform, covering Pulsar's architecture, its differences from other messaging systems, various integration patterns, and concrete code examples for stream and batch workloads.
On June 29, the Apache Flink Beijing Meetup presented a comprehensive analysis of Flink 1.9’s major architectural changes, new Table API & SQL capabilities, runtime and core enhancements, and future roadmap, with slides and resources made available for download.
This article provides an in‑depth overview of Flink SQL, covering its origins, the latest 1.7.0 and 1.8.0 enhancements, the underlying programming model, common operators and built‑in functions, and a complete end‑to‑end example that analyzes NBA scoring‑leader data using Flink SQL.
The article explains Kafka's consumer‑group rebalance and Pulsar's unified queue/stream subscription models, compares their partition assignment strategies, and demonstrates both with Docker‑based Pulsar setups, Java consumer code, and practical failover and exclusive scenarios.
This article provides a detailed introduction to FlinkCEP, covering how to add the library, define simple and composite patterns, use quantifiers and conditions, handle skip strategies, time constraints, and select results, with complete Java and Scala code examples for complex event processing.
Based on data transmission and reliability metrics, this article compares Apache Storm and Apache Flink in stream processing, presenting benchmark designs, test environments, results for synthetic and Kafka data, and offers practical recommendations such as operator chaining, object reuse, and checkpoint strategies to maximize Flink performance.
This article presents a detailed performance benchmark comparing Apache Storm and Apache Flink in stream processing, focusing on data transmission methods, reliability mechanisms, operator chaining, and both self‑generated and Kafka‑sourced workloads, and provides practical optimization recommendations based on the results.
The article presents Tencent's evolution of real‑time stream processing using Flink, the design of the Oceanus one‑stop visual platform, and a series of deep extensions and optimizations—including UI redesign, JobManager failover, checkpoint handling, enhanced windows, LocalKeyBy, idle detection, and log isolation—aimed at supporting petabyte‑scale data workloads.
The article presents Alibaba Cloud's real-time computing solution based on Flink and HBase, covering market competition, open‑source ecosystem, containerized architecture on Kubernetes, and typical applications such as online education video analysis, city‑brain traffic management, and fraud detection.
This article describes how Didi adopted Apache Flink for its real‑time data streams, detailing the platformized architecture, production use cases such as ETL, monitoring and CEP, the evolution of StreamSQL, and the engineering improvements made to support large‑scale, low‑latency processing.
This article explains why cache clusters are essential, describes the problems caused by hot keys and large values, and presents a multi‑layer solution using streaming analytics, automatic hotspot detection, local JVM caching, and rate‑limiting to keep backend systems stable under massive traffic spikes.
This article explains how Apache Flink's State TTL feature works, demonstrates configuring TTL for state size control and automatic cleanup, and details the continuous cleanup mechanisms introduced in Flink 1.8.0 for both heap and RocksDB state backends.
This article explains how Apache Flink’s TwoPhaseCommitSinkFunction, introduced in version 1.4, enables end-to-end exactly-once semantics when integrated with Apache Kafka, detailing the checkpoint mechanism and the two-phase commit protocol that ensures reliable data processing.
This article explains Apache Kafka as a distributed streaming platform, detailing its key features, core APIs, topic and log architecture, partitioning, consumer groups, guarantees, and how it serves both messaging and storage roles for real‑time and batch processing in big‑data environments.
By iteratively redesigning the fatigue‑event detection pipeline and leveraging Apache Flink’s stateful stream processing, the team reduced network overhead, cut resource usage to a third, and achieved a stable 45,000 TPS throughput on six containers with 20 GB memory, while outlining three optimization phases and practical lessons.
The article explains how data heterogeneity is achieved using JD's BinLake to capture MySQL binlogs, with Flink handling sequential and parallel consumption for order, subscription, and product data, discussing challenges such as ordering guarantees, idempotency, IO overhead, and the shift toward stream‑processing architectures.
Xianyu’s Mach system tackles the e‑commerce challenge of instantly selecting high‑quality items from billions of products by leveraging Blink’s low‑latency stream computing, detailing its architecture—including state, windows, custom UDX functions, data merging, rule execution, and SQL‑to‑MVEL conversion—to achieve sub‑second processing at massive scale.
Mahé, Xianyu’s real‑time product selection platform, uses Alibaba’s Blink stream engine to merge, evaluate roughly 300 rule‑based filters per item and emit only changed results, processing 1.4 billion daily messages at up to 50 k TPS through a four‑layer, stateful architecture.
Youzan’s real‑time computing platform progressed from early Storm deployments through Spark Streaming to a Flink‑based architecture, adding unified task management, monitoring, and dedicated streaming clusters, while now pursuing SQL‑driven jobs, a Druid OLAP engine, and a future real‑time data warehouse.
This article explains Apache Flink’s fundamental design principle that treats batch as a special case of stream, compares native streaming with micro‑batching, describes its deployment modes, fault‑tolerance mechanisms, unified data and scheduling layers, and outlines Alibaba’s architectural optimizations for the platform.
This article outlines the challenges of financial risk control in the internet era and presents a comprehensive real‑time metrics processing system, covering data leakage, fraud, big‑data opportunities, AI model deployment, and the technical architecture of the Bangsheng real‑time indicator platform.
Alibaba’s Blink, an internal enhancement of Apache Flink, is now open‑sourced, bringing advanced runtime, SQL/TableAPI, Hive compatibility, Zeppelin integration, and a revamped Flink Web UI to dramatically boost performance and scalability for both streaming and batch workloads.
This article analyzes the difficulties of achieving exactly-once delivery in Apache Flink, explains the distinction between state and end‑to‑end semantics, and details how idempotent and transactional sinks—illustrated with the Bucketing File Sink—realize exactly‑once guarantees through checkpoint‑based two‑phase commit.
This article explains the concept of stateful computation in stream processing, highlights the shortcomings of traditional systems, and details how Apache Flink provides rich state access, various state backends, and robust checkpointing mechanisms to achieve scalable, fault‑tolerant real‑time analytics.
