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JD Tech Talk

Jan 6, 2025 · Fundamentals

Understanding IO Models: Blocking, Non‑Blocking, Multiplexing, Signal‑Driven and Asynchronous IO

This article explains the fundamentals of input/output (IO) in operating systems, covering the basic IO concept, the role of the OS, the two‑phase IO call process, and detailed descriptions of blocking, non‑blocking, multiplexed (select, poll, epoll), signal‑driven and asynchronous IO models with example code.

IOMultiplexingNon‑Blocking IO

0 likes · 13 min read

Understanding IO Models: Blocking, Non‑Blocking, Multiplexing, Signal‑Driven and Asynchronous IO

macrozheng

Oct 10, 2024 · Fundamentals

How Zero‑Copy Boosts Data Transfer: IO Mechanisms, mmap, sendfile & splice Explained

This article explains the concept of zero‑copy, compares traditional I/O copying with mmap, sendfile, DMA scatter/gather and splice techniques, and shows how Java NIO leverages mmap and sendfile to achieve high‑performance data transfer while minimizing CPU involvement.

IOJava NIOLinux

0 likes · 15 min read

How Zero‑Copy Boosts Data Transfer: IO Mechanisms, mmap, sendfile & splice Explained

macrozheng

Sep 24, 2024 · Backend Development

Master SpringBoot’s Built‑in Utility Classes: Assertions, Collections, IO, and More

This article provides a concise guide to SpringBoot’s built‑in utility classes—including Assert, ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, and AOP helpers—explaining their purpose, key methods, and offering ready‑to‑use code examples to boost development efficiency.

AssertionsIOJava

0 likes · 14 min read

Master SpringBoot’s Built‑in Utility Classes: Assertions, Collections, IO, and More

Deepin Linux

May 24, 2024 · Fundamentals

Understanding Zero‑Copy Technology: Concepts, Mechanisms, and Linux Implementations

Zero‑copy is an optimization technique that eliminates unnecessary memory copies between kernel and user space by leveraging DMA, memory‑mapping and specialized system calls, thereby reducing CPU load, latency and improving throughput for high‑performance networking, storage and multimedia workloads.

DMAIOLinux

0 likes · 18 min read

Understanding Zero‑Copy Technology: Concepts, Mechanisms, and Linux Implementations

Rare Earth Juejin Tech Community

May 17, 2024 · Backend Development

Understanding and Optimizing Java Thread Pools: Creation, Configuration, and Monitoring

This article explains why threads are essential for performance, how to create and configure Java thread pools using the Executors utility, distinguishes CPU, IO, and scheduled pool types, and demonstrates monitoring techniques for latency and deadlock detection with practical code examples.

CPUExecutorServiceIO

0 likes · 25 min read

Understanding and Optimizing Java Thread Pools: Creation, Configuration, and Monitoring

JD Retail Technology

Mar 11, 2024 · Fundamentals

Understanding IO Models: Blocking, Non‑Blocking, Multiplexing, Signal‑Driven and Asynchronous IO

This article explains the concept of IO, the role of the operating system, the complete IO workflow, and compares five common IO models—blocking, non‑blocking, select/poll/epoll multiplexing, signal‑driven, and asynchronous—highlighting their mechanisms, advantages, and typical use cases.

IOMultiplexingNonBlocking

0 likes · 12 min read

Selected Java Interview Questions

Oct 12, 2023 · Backend Development

Spring Framework Utility Classes Overview: Assertions, ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, AopUtils

This article provides a comprehensive overview of Spring Framework utility classes—including Assert, ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, and AopUtils—explaining their purpose, key methods, and usage examples with code snippets for backend developers.

AssertionsBackendIO

0 likes · 14 min read

Spring Framework Utility Classes Overview: Assertions, ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, AopUtils

Java Architect Essentials

Sep 1, 2023 · Backend Development

Spring Boot Built‑in Utility Classes Overview

This article introduces the most commonly used Spring Boot utility classes—including assertions, object and collection helpers, file/IO utilities, reflection, and AOP support—providing code examples and usage guidelines to help Java backend developers write cleaner, more efficient code.

AssertionsIOJava

0 likes · 19 min read

Spring Boot Built‑in Utility Classes Overview

Selected Java Interview Questions

May 29, 2023 · Backend Development

Understanding Blocking, Non‑Blocking, and I/O Multiplexing Models in Unix Network Programming

This article introduces the basic concepts of I/O and explains three Unix network programming models—blocking I/O, non‑blocking I/O, and I/O multiplexing—detailing their workflows, advantages, disadvantages, and practical analogies for better comprehension.

IOIO MultiplexingNon‑Blocking IO

0 likes · 10 min read

Understanding Blocking, Non‑Blocking, and I/O Multiplexing Models in Unix Network Programming

Efficient Ops

Mar 1, 2023 · Backend Development

Understanding Synchronous vs Asynchronous and Blocking vs Non‑Blocking I/O in Java

This article uses a playful dialogue and water‑kettle analogies to explain the differences between synchronous and asynchronous I/O, blocking and non‑blocking operations, and then details Java's three I/O models—BIO, NIO, and AIO—so readers can choose the right approach for their web projects.

BackendIOJava

0 likes · 5 min read

Understanding Synchronous vs Asynchronous and Blocking vs Non‑Blocking I/O in Java

Rare Earth Juejin Tech Community

Nov 18, 2022 · Fundamentals

Understanding Java IO Streams: BIO, Byte and Character Streams, and Practical Read/Write Examples

This article introduces Java's three generations of IO frameworks, explains the differences between blocking BIO, NIO, and NIO2, details byte and character streams, and provides complete example programs for writing to and reading from text files using try‑with‑resources and stream conversions.

BIOIOJava

0 likes · 14 min read

Understanding Java IO Streams: BIO, Byte and Character Streams, and Practical Read/Write Examples

Architects' Tech Alliance

Jul 14, 2022 · Fundamentals

Understanding Synchronous vs Asynchronous, Blocking vs Non-Blocking, and Linux I/O Models

This article explains the concepts of synchronous and asynchronous execution, blocking and non‑blocking operations, user and kernel space, process switching, file descriptors, cache I/O, and compares various Linux I/O models such as blocking, non‑blocking, multiplexing, signal‑driven and asynchronous I/O, including the differences among select, poll and epoll.

IOLinuxasynchronous

0 likes · 14 min read

Understanding Synchronous vs Asynchronous, Blocking vs Non-Blocking, and Linux I/O Models

Refining Core Development Skills

Jan 6, 2022 · Fundamentals

The Evolution and Principles of Coroutines: From COBOL to Modern Languages

This article traces the historical origins of coroutines from early COBOL compiler challenges, explains their cooperative execution model, compares them with thread scheduling, and reviews how modern languages like Python, C++ and Go implement coroutine support to improve IO‑bound performance.

C++CoroutineGo

0 likes · 16 min read

The Evolution and Principles of Coroutines: From COBOL to Modern Languages

Coolpad Technology Team

Nov 18, 2021 · Mobile Development

Optimizing Cold Startup Performance of Android Apps: A Case Study with Alipay

This article analyzes why Alipay’s cold start on our device is slower than on competing phones and presents a series of optimizations—including CPU boosting, Dex2oat strategy adjustments, GC frequency reduction, and I/O improvements—that collectively close the performance gap.

AndroidCPUCold Start

0 likes · 11 min read

Optimizing Cold Startup Performance of Android Apps: A Case Study with Alipay

Top Architect

Aug 31, 2021 · Backend Development

Understanding Different I/O Models: Blocking, Non‑Blocking, Multiplexing, and Asynchronous

This article explains the four main I/O models—synchronous blocking, synchronous non‑blocking, I/O multiplexing (Reactor), and asynchronous I/O (Proactor)—illustrates their characteristics with examples, and encourages readers to share the content after gaining a clearer understanding of these fundamental backend concepts.

BackendIOMultiplexing

0 likes · 3 min read

Understanding Different I/O Models: Blocking, Non‑Blocking, Multiplexing, and Asynchronous

Full-Stack Internet Architecture

Aug 19, 2021 · Databases

Understanding Redis 6.0 Multithreading Model and Configuration

The article explains Redis 6.0's new features—especially the multithreaded network I/O model—why earlier versions were single‑threaded, how the IO threads cooperate with the main thread, configuration steps, thread‑count recommendations, and the model's limitations and performance implications.

DatabaseIORedis

0 likes · 9 min read

Understanding Redis 6.0 Multithreading Model and Configuration

Selected Java Interview Questions

Jul 10, 2021 · Backend Development

Differences Between Java NIO and IO, Channels, Buffers, and Their Comparison with Netty

This article explains the core differences between Java NIO and traditional IO, introduces the concepts of channels and buffers, describes buffer state management, provides a complete NIO selector code example, and compares the NIO workflow with Netty's model.

BackendBuffersChannels

0 likes · 10 min read

Differences Between Java NIO and IO, Channels, Buffers, and Their Comparison with Netty

Code Ape Tech Column

Mar 2, 2021 · Backend Development

A Quick Introduction to Java NIO with Practical Examples

This article explains Java NIO fundamentals—including Channels, Buffers, and Selectors—compares them with traditional IO, and provides multiple runnable code examples such as FileChannel, SocketChannel, Selector loops, memory‑mapped files, scatter/gather, transferTo/From, Pipe and DatagramChannel to illustrate non‑blocking and high‑performance I/O.

BufferIOJava

0 likes · 31 min read

A Quick Introduction to Java NIO with Practical Examples

vivo Internet Technology

Feb 25, 2021 · Mobile Development

Understanding File Descriptors and FD Leaks in Android

Android inherits Linux file descriptors, which are indexed by non‑negative integers and limited per process, and this article explains their kernel structures, common leak sources such as HandlerThread eventfd, unclosed streams, and SQLite cursor windows, plus practical commands and monitoring techniques to detect and fix FD leaks.

AndroidFD LeakFileDescriptor

0 likes · 20 min read

Understanding File Descriptors and FD Leaks in Android

Selected Java Interview Questions

Nov 20, 2020 · Fundamentals

Comprehensive Guide to Java IO Streams: Concepts, Types, and Practical Examples

This article explains the fundamentals of Java IO, covering the definition of streams, their characteristics, classification by direction, data unit and function, the role of node and processing streams, buffering for performance, serialization, and includes extensive code examples and efficiency comparisons.

Buffered StreamsFile I/OIO

0 likes · 23 min read

Comprehensive Guide to Java IO Streams: Concepts, Types, and Practical Examples