This article provides a practical overview of physical servers, comparing them with PCs, explaining hardware classifications, internal components, and essential parameters such as brand, model, serial number, and configuration, while highlighting their role in virtualization and data‑center operations.
This article explores the fundamental differences between servers and personal computers, covering hardware distinctions, operating system environments, classification by form factor and architecture, internal components, and key parameters such as brand, model, serial numbers, and configuration details.
This article explains virtualization concepts, the relationship between virtualization and cloud computing, details KVM architecture and installation, and shows how to manage and monitor KVM virtual machines using tools like libvirt, virt‑manager, virsh, and BCC tracing.
This article introduces six popular virtualization software options for individual users, detailing their key features, platform support, free versus paid versions, and unique advantages to help readers select the most suitable VM solution for testing, development, or everyday use.
This article explains Docker and container technology, contrasting it with virtual machines, describing how containers provide lightweight, fast-starting, isolated environments, outlining Docker's core concepts, commands, and underlying Linux kernel features such as namespaces and cgroups, and summarizing their benefits for developers and operations.
This article explains the motivations for adopting KubeVirt, introduces its concepts and architecture, details the component design, and provides step‑by‑step instructions—including code snippets—for deploying KubeVirt, CDI, Ceph‑CSI, external snapshotter, creating VMs and exposing VNC, while outlining future directions for cloud‑native virtualization.
This article explains how modern data‑center virtualization is shifting from one‑to‑many to many‑to‑one VM models, then walks through the virtio and vhost‑net architectures, their kernel and user‑space components, and provides a step‑by‑step guide to set up a nested KVM environment with OVS for external network access.
The KubeVirt community announces the v1.0 release, detailing its history from a 2016 Red Hat experiment to a CNCF graduated project, describing new features across SIGs, updated release cadence, and future roadmap for cloud‑native virtualization on Kubernetes.
Tencent Cloud’s extensive PMU enhancements—including guest PEBS support, new Intel SPR PDIR++ and PDist features, and AMD Zen4 PerfMon V2 with global‑control registers—significantly lower KVM virtualization overhead, boost instruction‑level accuracy, and provide upstream open‑source contributions for broader cloud performance optimization.
Tencent Cloud’s Hybrid vCPU research, presented at KVM Forum 2023, outlines a three‑stage roadmap from homogeneous cores to mixed x86, ARM, and RISC‑V CPUs, detailing how virtualizing heterogeneous topologies, frequencies, caches, and PMU features can boost VM performance, security, live‑migration flexibility, and data‑center utilization.
This article explains VMware's three network connection types—Bridge, NAT (VMnet8), and Host‑Only (VMnet1)—detailing how each creates virtual adapters, how IP addressing works, and the advantages and limitations of each mode for virtual machine communication.
This article explains the benefits of using Docker for local development, details how Docker Desktop creates a virtualized environment, guides through installing Docker Desktop on Windows (including handling WSL2 kernel and BIOS virtualization issues), and demonstrates running an Nginx container as a first example.
This guide introduces ten popular Linux virtualization solutions—ranging from open‑source desktop hypervisors to enterprise‑grade platforms—detailing their key features, advantages, and typical use cases for developers, system administrators, and businesses.
The article explains Docker's advantages for local development, details common installation issues such as WSL2 kernel updates and BIOS virtualization settings, and walks through setting up Docker Desktop, running a sample Nginx container, and addressing further challenges in container‑based workflows.
This guide introduces six popular virtualization software options—VMware Workstation, VMware Fusion, VirtualBox, QEMU, Parallels Desktop, and Microsoft Hyper‑V—detailing their key features, platform support, pricing models, and why they are suitable for personal testing, development, and learning environments.
This article explains why using Docker for local development offers clear benefits such as isolation, reproducibility, and easy cleanup, walks through installing Docker Desktop with WSL2 and BIOS virtualization settings, and demonstrates running an Nginx container to illustrate the workflow.
This comprehensive guide explains Libvirt’s architecture, installation, network configurations, bridge and NAT modes, optional Open vSwitch usage, and detailed steps for KVM live migration, providing command‑line examples and XML snippets for effective virtualization management.
VirtIO, a para‑virtualization device interface created by Rusty Russell, delivers near‑native I/O performance in virtualized environments by separating front‑end drivers and back‑end emulators, standardizing device types, and optimizing transport through Virtqueues, making it a key component of modern cloud and Linux virtualization stacks.
This article provides a comprehensive overview of the ARMv8‑A architecture, detailing its two execution states (AArch64 and AArch32), register sets, exception levels, instruction sets, key features, and the mechanisms that enable virtualization such as hypervisor operation at EL2, stage‑2 address translation, VMID handling, and device emulation through SMMU.
This article traces the evolution of data storage and computing—from 1725’s punched paper tape and Jacquard looms through Turing’s theoretical breakthroughs, early computers, the rise of operating systems, virtualization, cloud services, and modern AI—highlighting how each milestone laid the groundwork for today’s digital world.
This article explains how CNStack’s cloud‑native virtualization service combines KubeVirt, containerized storage, and hybrid networking to manage VMs alongside containers, detailing its architecture, features, VM image pipeline, and future roadmap for unified cloud‑native operations.
This guide walks you through enabling the required Windows features, downloading a community‑built WSA package, running the installation script, handling version requirements, troubleshooting common failures, and uninstalling the subsystem on Windows 10.
Microsoft has partnered with Parallels to allow the Arm version of Windows 11 Pro and Enterprise to run in virtual environments on Apple M1 and M2 Macs, offering a licensed solution, one‑click installation tools, and alternative cloud PC options, while noting hardware and software limitations.
Microsoft and Parallels now enable Arm‑based Windows 11 to run in virtual environments on Apple M1 and M2 Macs, offering a licensed solution with one‑click tools, while noting performance limits and alternative cloud options.
This guide explains how Docker‑OSX lets you launch a fully functional macOS environment inside a Docker container, covering installation, key features, command‑line setup, SSH access, VNC visualization, and tips for building a VNC‑enabled image.
This article explains the design of Virtio-fs, its architecture and high‑availability features, and details the crash‑recovery mechanism—including crash models, state preservation, supervisor coordination, request idempotence, downtime optimization, and hot upgrade/migration—implemented by ByteDance's STE team for secure container workloads.
This article clarifies the three VMware Workstation network modes—Bridge, NAT, and Host‑Only—by describing their virtual switch configurations, how they map to VMnet adapters, and the practical implications for connectivity, security, and IP addressing.
This interview reveals how ByteDance’s STE team, a youthful group of Linux kernel engineers, identified and solved memory‑management redundancy, contributed the HVO and VDUSE projects to the open‑source community, and leveraged these advances to boost cloud‑native performance and reliability across the company.
This article reviews ByteDance's STE team's breakthrough that reduces KVM hot‑upgrade downtime from 1000 ms to 160 ms by transparently supporting PCI passthrough devices, detailing the underlying challenges, three key kernel/hypervisor improvements, proof‑of‑concept results, and their impact on cloud IaaS operations.
This article explains how Kubernetes can be configured for multi‑tenant isolation using control‑plane mechanisms like namespaces, RBAC, and quotas, data‑plane techniques such as container runtimes, storage policies, and network policies, and compares namespace‑based tenancy with virtual control‑plane and multi‑cluster approaches.
The article provides a comprehensive technical walkthrough of the Hyper‑V DirectX component, detailing its architecture, virtual GPU configuration, attack surface, and step‑by‑step exploitation of four critical CVEs (CVE‑2022‑21918, CVE‑2021‑43219, CVE‑2022‑21912, CVE‑2022‑21898) with code snippets and debugging insights.
Guest PEBS, a virtualization‑aware implementation of Intel’s Precise Event‑Based Sampling integrated into KVM by Tencent Cloud, eliminates interrupt overhead and instruction‑skid, delivering low‑latency, fine‑grained hardware performance data inside virtual machines, enabling accurate profiling, latency reduction, and cost‑effective optimization for cloud workloads.
Oracle’s VirtualBox 7 beta introduces official support for Windows 11, macOS Big Sur and Monterey, enhances the Windows 11 setup experience with unattended installation, and expands host‑OS compatibility, while keeping the open‑source, XML‑based VM configuration that makes migration easy.
This article explains Docker's background, how it differs from virtual machines, its practical advantages such as resource efficiency, fast startup, consistent environments, and continuous delivery, and introduces core concepts like images, containers, and repositories for modern cloud‑native development.
This talk walks through Docker’s appeal, its rise to popularity, the underlying container technology history, core architecture, networking, namespaces, cgroups, and common commands, illustrating how containers streamline deployment compared to traditional VMs and why Docker remains pivotal in cloud-native environments.
This article examines the fundamental differences between virtual machines and containers, compares their performance, resource usage, and security, and presents arguments from both supporters to assess whether containers will ultimately replace virtual machines in development and data‑center environments.
This article provides a detailed overview of large‑scale RDMA technology, covering basic concepts, major protocols, network‑level techniques such as congestion control, lossless‑to‑lossy evolution and multipath, virtualization, communication libraries for AI training and storage, performance tuning, monitoring, and real‑world deployment experiences.
The article examines why Ant Design's Table feels sluggish, covering its historical design choices, memoization behavior, challenges with virtual scrolling and editable cells, and how breaking‑change management influences performance and developer experience.
This article examines why Ant Design’s Table component often feels sluggish, covering historical design choices, memoization pitfalls with external state, the challenges of virtual scrolling for editable tables, and how the shouldCellUpdate and onCell APIs provide finer‑grained rendering control.
Ubuntu 22.04 LTS, codenamed Jammy Jellyfish, introduces five distinctive capabilities—including optimized data‑driven workloads, enhanced Active Directory integration, a real‑time kernel option, updated packages and drivers, and performance boosts—that together position it as arguably the strongest long‑term support Ubuntu version to date.
This article provides a comprehensive overview of virtualization technology, covering its historical background, core concepts such as partitioning, isolation and encapsulation, various virtualization models including full, paravirtualization, hardware‑assisted approaches, and the evolution toward containerization with Docker and LXC.
This article explains how Kube-OVN extends KubeVirt networking by providing fixed and stable VM IP addresses, multi‑tenant VPC/Subnet isolation, live‑migration IP preservation, and high‑performance SR‑IOV/OVS‑DPDK acceleration, along with practical configuration examples and reference links.
This comprehensive guide explains Docker's core concepts, advantages over traditional virtual machines, installation steps, essential commands, Dockerfile directives, image import/export, storage volumes, and networking options, providing a practical roadmap for container-based development and operations.
This comprehensive guide explains Docker's core concepts, advantages over traditional VMs, architecture, essential commands, Dockerfile syntax, image management, storage volumes, and networking modes, providing step‑by‑step instructions for installing, configuring, and operating containers on Linux systems.
This article reviews the evolution of data‑center infrastructure across three historic waves, introduces the fourth wave—Application‑Defined Infrastructure (ADI)—and examines how container technology, hypervisor‑based virtualization, hyper‑converged infrastructure, and Robin Systems’ ADI solution address the operational challenges of modern cloud‑native and stateful applications.
This article explains ARMv8‑A AArch64 virtualization support, covering Stage 2 page‑table translation, virtual exceptions, traps, hypervisor types, memory management, device emulation, interrupt handling, clock virtualization, VHE, nested virtualization, and the performance overhead of context switches.
WebVM is a browser‑based virtual machine that runs a full Debian environment entirely on the client using HTML5, WebAssembly, and the CheerpX technology, eliminating the need for a server and allowing execution of x86 binaries, Python, C, and other languages directly within the web.
This article explains what Vagrant is, outlines its development history, provides step‑by‑step instructions for installing and using it, compares it with traditional virtual‑machine workflows, and highlights its advantages for creating reproducible development environments.
This article explains the fundamentals of Armv8‑A AArch64 virtualization, covering stage‑2 address translation, virtual exceptions, hypervisor types, VM/vCPU relationships, memory‑management integration, MMIO emulation, SMMU handling, instruction trapping, virtual interrupt routing, clock virtualization, VHE, nested virtualization and associated performance overheads.
This article describes Yiche's cloud‑native transformation that unifies virtualization and containerization by evaluating Kata, Virtlet and KubeVirt, selecting KubeVirt, detailing its architecture, storage integration, custom enhancements, deployment challenges, and future work for a hybrid infrastructure.
This guide walks you through installing Multipass on macOS, creating and managing lightweight Ubuntu virtual machines via the command line, including mounting directories, transferring files, automating setup with cloud‑init, and comparing its simplicity to Docker‑style workflows.
Security researchers at ESET reveal that the Hive ransomware group has expanded its attacks to Linux and FreeBSD systems, releasing a buggy yet feature‑rich Linux variant written in Go, while noting a broader industry trend of ransomware operators developing Linux encryptors to compromise virtualized server environments.
Docker is a lightweight, open‑source container platform that packages applications and their dependencies into portable images, offering faster startup, lower resource consumption, and easier migration compared to traditional virtual machines, while providing isolation, standardization, and security for modern cloud‑native deployments.
KVM turns the Linux kernel into a hypervisor that, together with QEMU, provides hardware‑assisted CPU and memory virtualization on ARM64 platforms, using EL2‑based Stage‑2 address translation, while offering multiple I/O virtualization methods such as emulation, virtio, device passthrough, and shared assignment for flexible guest performance and isolation.
This tutorial walks through the fundamentals of Linux bridge devices, showing how to create a bridge with iproute2, connect it to veth pairs, assign IP addresses, attach a physical NIC, and apply the setup in virtual‑machine and Docker environments while explaining common pitfalls and networking behavior.
Virtualization is a resource management technique that abstracts physical servers, networks, memory, and storage into flexible virtual components, enabling higher utilization, isolation, and flexibility across software, hardware, memory, network, desktop, and service layers, with hypervisors like VMware ESXi, KVM, and Xen orchestrating multiple operating systems on a single physical host.
This article explains the role of operating systems in computers and servers, outlines the main server OS families, introduces TencentOS's server, IoT, and edge variants, and details the performance, security, and cloud‑native advantages of TencentOS Server.
This article traces the historical development of IT infrastructure—from 1990s LAN‑based client/server systems through data‑center hosting, virtualization, and finally the serverless model—explaining how each stage addresses previous limitations and why stateless function execution has become the modern cloud computing paradigm.
The talk explains how a purpose‑built microVMM like Firecracker—an ultra‑lightweight, Rust‑based virtual machine monitor running on KVM—delivers the strong isolation, millisecond‑scale startup, and high‑density performance essential for modern serverless platforms, while outlining current benchmarks and future enhancements.
This article traces the evolution of cloud computing from the first computer ENIAC through the rise of networks, servers, and data centers, explains how Amazon and Google pioneered the term, and highlights its three core features—resource pooling, elastic scalability, and reliable security—showing why it’s reshaping IT today.
This article explains the evolution of cloud computing from resource management to elastic virtualization, the emergence of IaaS, PaaS and SaaS service models, how big‑data processing relies on distributed cloud platforms, and why artificial intelligence now depends on massive data and cloud‑scale compute to deliver intelligent services.
This article explains the concept of a virtual tree, why it is needed for rendering massive data sets, and provides a step‑by‑step implementation—including flattening the tree, calculating visible nodes, simulating scroll, and decorating the list—demonstrating a speedup from 26 seconds to 0.19 seconds.
This article explains what Docker is, its underlying architecture—including namespaces, cgroups, and union file systems—its client‑server model, its core concepts such as images and containers, its installation methods, a step‑by‑step Koa hello‑world example, and how to migrate containers using export and import commands.
In this interview, ByteDance cloud engineer Wu Chen explains how system‑level IaaS virtualization delivered elasticity, cost‑effectiveness, and strong isolation to support Douyin’s Spring Festival red‑envelope event, compares virtualization with containers, shares reliability lessons from a power‑outage test, and outlines future trends.
This article explains how to configure Linux network interfaces, interpret configuration files, set up DNS and hosts, understand routing (static and dynamic), examine IP and MAC header structures, apply CIDR subnetting, differentiate private and public addresses, and choose common virtual networking methods such as bridge, NAT, and host‑only.
The article explains how Nutanix's hyper‑converged infrastructure combines general‑purpose servers, local storage, and intelligent software to replace traditional siloed data‑center components, offering scalable, fault‑tolerant, and cloud‑like performance for enterprise IT environments.
This article introduces Docker as an open‑source container platform, explains how containers run on Linux and Windows hosts, describes Windows Server and Hyper‑V container runtimes, and compares Docker containers with traditional virtual machines, highlighting resource efficiency, isolation, and deployment advantages.
This guide details the investigation of Mellanox CX‑5 NIC support for OVS flow‑table acceleration, outlines required software versions, explains VT‑d and SR‑IOV technologies, provides step‑by‑step host configuration, OVS setup, test procedures, performance results in VXLAN and VLAN environments, and explores the feasibility and scripts for VF hot‑migration.
This article provides a concise, illustrated explanation of the relationship between Kubernetes and Docker, covering official definitions, virtualization and deployment perspectives, and how Kubernetes manages Docker containers, helping readers grasp core concepts and practical usage in modern cloud-native environments.
This article details the leaked Windows 10X RTM build, explains how to set up the VHDX image in Hyper‑V, and walks through the system’s unique UI, task‑bar, start menu, operation center, resource explorer, split‑screen, shortcut keys, anti‑theft features, and app compatibility limitations.
This article provides a comprehensive overview of KubeVirt, a Kubernetes plugin that enables virtual machine management alongside containers, covering its background, technical selection, core concepts, CRDs, component architecture, common operations, storage and networking options, SDK usage, and integration into a private cloud platform.
This article explores how KubeVirt extends Kubernetes to manage virtual machines, compares it with OpenStack, details technical selection, core components, CRDs, storage and networking options, and shares practical SDK usage and migration experiences for cloud‑native virtualization.
This article explains the evolution of virtualization—from early hypervisors and Popek‑Goldberg requirements through full and para‑virtualization, hardware‑assisted techniques, KVM‑QEMU integration, and finally ultra‑light solutions like firecracker—highlighting their roles, trade‑offs, and impact on cloud computing.
This article introduces KubeVirt as a Kubernetes plugin for managing virtual machines, compares it with OpenStack and other solutions, explains its CRDs, components, storage and networking options, and provides detailed code examples and SDK usage for deploying and operating VMs in a cloud‑native environment.
This article explains how KubeVirt extends Kubernetes to manage virtual machines, covering the background of OpenStack‑to‑K8s migration, technical selection, KubeVirt architecture, CRDs, components, common operations, storage and networking choices, SDK usage, and practical deployment experiences within a private cloud platform.
This article examines the challenges of running both VMs and containers in a hybrid OpenStack‑Kubernetes environment, evaluates KubeVirt against alternatives such as Virtlet and Kata, and provides detailed guidance on KubeVirt architecture, CRDs, storage, networking, SDK usage, and integration with internal platforms.
This guide walks through using macOS Big Sur's Virtualization Kit together with the open‑source vftool to compile, sign, and run a minimal Ubuntu virtual machine, covering image preparation, network configuration, launchctl auto‑start, and essential post‑creation tweaks.
This guide explains practical techniques and command‑line tools—such as systemd‑detect‑virt, cgroup inspection, DMI data, and cloud‑provider metadata—to determine whether a given shell environment is running inside a container, a virtual machine, or on bare‑metal hardware, including scripts for Docker, rkt, AWS, OpenStack and more.
This guide introduces Nano, a Go‑based KVM virtualization manager, and walks through its core architecture, three‑minute installation, service startup, and basic configuration for creating and monitoring cloud instances.
This tutorial explains how to leverage KubeVirt on a Kubernetes cluster to create and run a Windows 10 virtual machine, covering architecture, disk options, preparation, installation, image upload, VM definition, networking, VNC/RDP access, and CNI troubleshooting in a comprehensive, hands‑on manner.
Docker emerged to address the challenges of disparate development, testing, and production environments by leveraging Linux kernel features like namespaces and cgroups, offering lightweight, fast-starting containers that isolate applications without the overhead of traditional virtual machines, and providing versatile use cases from cloud hosting to CI/CD pipelines.
This article explains how DevOps principles are adapted for mobile app delivery, detailing the unique challenges of fragmented build environments, device diversity, longer release cycles, and massive scale, and describes Alibaba Cloud’s EMAS Mobile DevOps solution, its architecture, security, scalability, and future roadmap.
Docker confirms plans to support Apple Silicon Macs but faces several technical hurdles, requiring pipeline changes, reliance on Go and Electron, and coordination with other virtualization tools like VMware and Parallels to deliver a seamless Docker Desktop experience on M1 devices.
This article provides a concise, three‑chapter overview of servers, defining what a server is, detailing the hardware components that make up modern server systems, and explaining the software layers—from operating systems to virtualization and cloud services—that enable diverse enterprise applications.
This article traces the evolution of container technology from early OS virtualization concepts in the 1970s through the rise of Docker, Kubernetes, and CNCF standards, outlining four distinct development phases, resource‑isolation techniques, commercial service models, and future trends shaping the cloud‑native ecosystem.
The article examines the end of Moore's Law, the rapid growth of cloud computing, the challenges of virtualization overhead, and how Alibaba's Shenlong architecture leverages hardware acceleration to revive performance gains and reshape the future of hardware‑software co‑evolution.
The article explains the three cloud computing service models—Infrastructure as a Service, Platform as a Service, and Software as a Service—detailing how each layer integrates resources, benefits users and providers, and fits into the overall resource‑integration hierarchy of cloud architecture.
This article chronicles the evolution of cloud computing, beginning with early mainframe concepts like ENIAC and time‑sharing, through the emergence of utility and grid computing, and culminating in the commercial breakthroughs of Amazon Web Services and Google’s cloud initiatives.
This article explains hyper‑convergence technology—its definition, evolution from 1.0 to 3.0, core features such as software‑defined storage and VM‑centric design, market growth, and the strategic value it brings to modern cloud‑native data‑center architectures.
An in‑depth look at bare metal servers explains how they differ from virtualized cloud instances, why they’re needed for performance‑critical or security‑sensitive workloads, their integration with cloud services, and market trends driving their growing adoption.
DiDi Cloud reduced GPU VM provisioning latency by over 90% through kernel‑level pre‑zeroing of idle pages, transparent huge pages, optimized VFIO DMA mapping, and boot‑sequence streamlining, turning GPU instance creation faster than CPU‑only VMs and meeting strict latency demands.
This article traces Docker's evolution from a startup's LXC‑based PaaS to an open‑source container platform, explains its lightweight virtualization advantages over virtual machines, introduces Kubernetes as a powerful orchestration system, and shows how these technologies are reshaping telecom core networks with container‑based micro‑services.
The article presents a detailed analysis of the 2019 Q4 global hyper‑converged infrastructure market, highlighting revenue growth, vendor market shares, the three main competitive camps, and the rising role of Chinese manufacturers such as Huawei, H3C and Sangfor.
This article explains how virtualization technology—ranging from early hypervisors and Popek‑Goldberg requirements to hardware‑assisted extensions, KVM‑QEMU, and lightweight container solutions like Docker and Firecracker—forms the foundation of modern cloud computing, detailing its evolution, mechanisms, and trade‑offs.
This article explores the evolution of virtualization technology—from its theoretical foundations and early hypervisor designs to full and para-virtualization, hardware-assisted extensions, and lightweight solutions like containers and microVMs—explaining key concepts, architectures, and their roles in modern cloud computing.
This tutorial provides a detailed, step‑by‑step walkthrough for installing CentOS 8 on VMware Workstation (or VirtualBox/Docker), covering preparation, virtual machine configuration, OS installation options, network and storage settings, and final login procedures for system administrators.
This article traces the evolution from early virtualization challenges to modern container technologies, explaining how LXC laid the groundwork for Docker, how Docker differs from virtual machines, and why containers have become essential for cloud‑native development and DevOps workflows.
This article provides a comprehensive, numbered glossary of core operating‑system concepts—including OS fundamentals, kernel and user modes, memory hierarchy, process management, I/O mechanisms, virtualization, and networking—each defined succinctly and illustrated with diagrams to aid understanding.
This article explains the concept of cloud computing, its historical background, core characteristics such as virtualization, scalability and on‑demand provisioning, and describes the three main service models—Infrastructure as a Service, Platform as a Service, and Software as a Service—while highlighting its benefits for enterprises and individuals.
This article explains how Docker solves environment‑configuration challenges, compares containers with virtual machines on startup speed, resource usage, and isolation, outlines Docker’s key advantages such as easy deployment and low cost, and discusses its remaining drawbacks like isolation limits, performance under high concurrency, and storage considerations.
