This article provides a comprehensive overview of Apache APISIX Ingress, explaining its architecture, comparison with Kubernetes Ingress Nginx, detailed feature set, custom resource definitions, practical deployment scenarios such as traffic splitting and authentication, and future roadmap within the cloud‑native ecosystem.
This article explains how Spinnaker enables continuous delivery in Kubernetes environments by describing its role, deployment workflow, micro‑service architecture, pipeline design across DEV and UAT namespaces, and practical best‑practice recommendations for secure and efficient CD operations.
In this interview, Zhou Xiaosi shares his seven‑year journey at QingCloud, the challenges of launching KubeSphere, his product and R&D management philosophy, and why hybrid‑cloud and cloud‑native strategies are essential for Chinese software to become globally competitive.
The article examines Docker’s evolution from a pioneering container platform to its current struggles, highlighting how funding pressures, strategic missteps, a contentious relationship with Kubernetes, and leadership conflicts led to missed commercial opportunities and a precarious future for the company.
This article explains why modern enterprises need multiple Kubernetes clusters—covering single‑cluster limits, hybrid‑cloud requirements, and fault‑tolerance—then compares two architectural models and reviews both Kubernetes‑centric federation and network‑centric service‑mesh solutions with practical implementation guidance.
This article provides a comprehensive overview of microservices architecture, covering its definition, key characteristics, advantages and drawbacks, suitable organizational contexts, core components such as service discovery, gateways, configuration centers, monitoring, circuit breaking, as well as containerization and orchestration technologies.
This article explains the architecture of Nacos, its core components such as Provider/Consumer apps, Name Server, Nacos Server and Console, and details how Spring Cloud integrates with Nacos for service registration, heartbeat monitoring, dynamic address discovery, and the underlying Open API/SDK mechanisms.
This article explains the fundamentals of Kubernetes and Docker, covering container concepts, Linux namespaces and cgroups, Docker's evolution, and a detailed overview of Kubernetes' master‑node architecture and its core components for managing containerised workloads.
This article details the evaluation, migration, and practical implementation of replacing Ingress‑Nginx with Apache APISIX Ingress at YouPai Cloud, covering architectural changes, performance trade‑offs, configuration methods, health‑check strategies, and future expectations for a unified cloud‑native gateway.
Recent tech headlines cover Apple’s former materials chief under criminal investigation, Facebook’s massive outage, Google’s Android 12 launch, the Forbes Cloud 100 rankings, a Linux Foundation report showing a 455% rise in Kubernetes certifications, and a new cloud‑native training course.
This tutorial introduces Knative, explains its architecture and core components, and provides a detailed, image‑rich walkthrough for deploying Knative on Alibaba Cloud, testing a sample serverless application, and managing the cluster via CloudShell.
This article provides a comprehensive overview of Spring Cloud’s core modules—including Eureka, Zuul, Ribbon, Hystrix, Feign, and Config—explains their roles in microservice architectures, compares registration centers such as Nacos, ZooKeeper, Consul and Etcd, and discusses best practices for API gateways and service discovery.
This article explains the Kubernetes pod lifecycle, the meaning of the Terminating state, detailed pod creation and deletion processes, and the eviction mechanisms of both kube‑controller‑manager and kubelet, offering troubleshooting steps and best practices to resolve pods that remain stuck in Terminating.
This article presents a comprehensive overview of serverless application DevOps, covering the definition, benefits, common use cases, development workflow, container image deployment, CI/CD pipelines with AWS SAM, security strategies, monitoring tools, and real‑world examples such as Coca‑Cola.
This article introduces ten powerful Alibaba open‑source projects—including Druid, fastjson, Dubbo, RocketMQ, Arthas, Nacos, EasyExcel, Sentinel, Otter, P3C, and Spring Cloud Alibaba—detailing their key features, advantages, usage scenarios, and Maven dependencies, providing developers with essential tools for building robust, cloud‑native Java applications.
This article presents a collection of powerful kubectl commands and techniques—including API inspection, status‑based pod filtering, node‑specific pod listing, distribution counting with awk, and proxy usage—to help Kubernetes users troubleshoot and manage clusters more efficiently.
This article compares nine widely used open‑source service‑mesh frameworks, explains their core features and typical use cases, and provides practical criteria to help DevOps teams select the most suitable mesh for their micro‑service deployments on Kubernetes or other platforms.
This article provides a comprehensive overview of the Cloud Native Computing Foundation (CNCF), its origins, definition of cloud‑native, the full technology stack, member organizations, key historical milestones, 2019 survey statistics, and a technical comparison between the SpringCloud + CloudFoundry and container + Kubernetes ecosystems.
This article explains how OpenKruise extends Kubernetes with PodUnavailableBudget to protect application availability during voluntary disruptions, compares it with native PodDisruptionBudget, and provides practical YAML examples for stateless, stateful, and single‑instance workloads.
This tutorial explains why Kubernetes controllers are essential for pod reliability, details the concepts and specifications of DaemonSet, Job, and CronJob, provides step‑by‑step YAML examples and kubectl commands, and demonstrates rolling updates and scheduled tasks in a cloud‑native environment.
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.
This article examines the business storage requirements of large‑scale advertising platforms and details how BaikalDB was architected as a cloud‑native, MySQL‑compatible distributed database that combines OLTP, OLAP, KV and full‑text capabilities while ensuring high reliability, low cost and linear scalability.
This article explains the motivation behind choosing Loki over heavyweight ELK/EFK stacks for container‑cloud logging, outlines Loki's lightweight architecture and components, provides step‑by‑step deployment instructions on OpenShift/Kubernetes, and demonstrates how to query logs using the LogQL language and HTTP API.
In this interview, Baidu's chief infrastructure architect explains the high‑performance, data‑intensive demands of its core search business, the role of middle‑platform and microservice architectures, the evolution and impact of cloud‑native technologies, and practical advice for SME architects designing modern IT systems.
This article explains how to configure Kubernetes liveness, readiness, and startup probes using exec, HTTP, and TCP checks, demonstrates practical YAML examples, shows how probes affect pod lifecycle events, and provides best‑practice recommendations to avoid common pitfalls.
This article analyzes why our Kubernetes clusters were constantly unstable—citing an erratic release process, missing monitoring, logging, documentation, and unclear request routing—and presents a comprehensive solution that includes a Kubernetes‑centric CI/CD pipeline, federated monitoring, centralized logging, a documentation hub, and integrated traffic management.
This article explains what object storage services are, introduces MinIO as a compatible, high‑performance open‑source alternative to AWS S3, and provides step‑by‑step guidance for single‑node and distributed deployments using Docker on various operating systems.
The article explains the history of containers, the role of Docker and Kubernetes, why Kubernetes is deprecating Docker's dockershim, the timeline for the change, its impact on users, and the steps required to migrate to OCI‑compatible runtimes such as containerd or CRI‑O.
This article introduces Loki, a lightweight log aggregation system for Kubernetes, explains its background and motivations, details its simple architecture and core components (Distributor, Ingester, Querier), discusses scalability and storage options, and provides step‑by‑step deployment instructions with example YAML and shell commands.
The article explains how Alibaba merged its proprietary HSF framework with the open‑source Dubbo, outlines the technical challenges of cloud‑native migration, describes Dubbo 3.0’s new features such as the Triple protocol and Service Mesh integration, and shares a large‑scale production case from DingTalk.
This article explores HashiCorp's evolution, detailing how its low‑code tools like Terraform, Nomad, Consul, and Vault automate complex cloud infrastructure tasks, the founders' story, product pivots, and the company's future in the rapidly changing cloud‑native landscape.
This guide explains what an Envoy CORS filter is, details its configuration options, and provides step‑by‑step VirtualService and EnvoyFilter examples for simple, credentialed, prefix, regex, exposed‑header, non‑simple requests and shadow logging in Istio.
This guide explains how to use Velero to back up and restore Kubernetes clusters, covering its principles, backup types, storage configuration, installation of Velero and MinIO, and step‑by‑step commands for creating, testing, and recovering a MySQL workload.
This article provides a comprehensive overview of Kubernetes, covering its core features, resource‑estimation examples, evolution of service deployment models, the relationship between cloud and Kubernetes, cloud‑native principles, and a detailed look at its historical background and architectural components.
This article introduces the Internet of Things concept, highlights its massive market growth, and provides a detailed overview of DC3—an open‑source, Spring Cloud‑powered IoT platform—including its four‑layer architecture, core modules, and functional goals for scalable, fault‑tolerant, and cloud‑native deployments.
This session explains why Kubernetes monitoring is essential for end-to-end observability, describes the five data sources and layers it covers, and walks through discovering and locating architecture, performance, resource, scheduling, and network issues using topology, anomaly detection, and correlation techniques.
This guide walks beginners through a structured learning path for Kubernetes, covering fundamentals, core components, key objects, controllers, storage, networking, resource management, security, cluster operations, backup, logging, monitoring, DevOps practices, and deeper topics like architecture, source code, and operator development.
This comprehensive guide walks beginners through Kubernetes fundamentals, core components, key objects, storage, networking, resource management, security, cluster operations, backup, logging, monitoring, DevOps practices, and deep‑dive techniques, providing a clear learning path and practical tips for effective use.
In this interview, Huawei Cloud Chief Fang Guowei shares his journey from early cloud pioneer to executive, explains why psychological and profit barriers outweigh technical challenges, outlines Huawei Cloud’s six strategic strengths, introduces Cloud Native 2.0, and offers practical advice for developers and enterprises navigating digital transformation.
This article examines the challenges of exploding microservice counts, rising infrastructure costs, and complex topologies, and details a cloud‑native, service‑decoupled DevOps infrastructure that uses standardization, declarative provisioning, intelligent automation, contract and diff testing, and a unified release engine to dramatically improve delivery efficiency and reliability.
This guide explains how kubectl interacts with the Kubernetes API, demonstrates command‑completion setup for Bash, Zsh and macOS, shows how to view resource specifications, use custom‑column output, switch clusters and namespaces via kubeconfig or kubectx, and extend functionality with plugins such as krew.
The SpringOne conference highlighted the upcoming Spring Framework 6.0, detailing its Java 17 and Jakarta EE 9 foundation, roadmap milestones, key migration points, Spring Boot 3 integration, and the imminent Java 17 release, offering developers a clear view of the next decade of Spring development.
This article analyzes the limitations of the Linux Completely Fair Scheduler (CFS) for high‑priority workloads, introduces Tencent's custom offline BT scheduler that provides absolute preemption, and presents experimental results showing significant improvements in latency, CPU utilization, and carbon‑reduction for cloud‑native services.
GitOps automates infrastructure management by applying DevOps best practices such as version control, pull requests, and CI/CD pipelines to declarative infrastructure code, enabling reliable, observable, and secure deployments especially in Kubernetes‑based cloud‑native environments.
This article explains what an error‑tracking system is, introduces Sentry, and provides a step‑by‑step guide to deploying Sentry on Kubernetes using Helm, OpenEBS storage, PostgreSQL, and configuring projects and alerts for effective monitoring.
This article explains the core principles of Kubernetes networking, covering pod IP allocation, intra‑node communication via veth pairs and bridges, and inter‑node packet routing using CIDR blocks and cloud provider routes, all illustrated with diagrams.
The article analyzes how digital transformation creates new "agile IT" demands—such as massive app operations, self‑developed services, frequent migrations, and decoupled architectures—and explains why cloud‑native technologies, organized around containers, microservices, and DevOps, are essential to meet these challenges across four evolutionary stages.
Facing over a million concurrent connected vehicles, Chinese IoT leader ZhongRui chose RocketMQ over Kafka, leveraging Alibaba Cloud’s managed service to achieve low‑latency, high‑throughput, fault‑tolerant messaging, while adopting cloud‑native microservices, containerization, and serverless techniques to streamline operations and reduce costs.
This article presents a comprehensive design of a cloud‑native ClickHouse OLAP system, detailing its three‑layer architecture, storage‑compute separation, unified metadata management, high‑availability mechanisms, elastic scaling, cost reductions, and future enhancements for multi‑replica and MPP query support.
This guide introduces beginners to containerization by explaining Docker’s core components, Linux kernel mechanisms, and networking, then progresses to Kubernetes, detailing its architecture, key objects such as Pods, Deployments, Services, and storage concepts, and how they orchestrate distributed container workloads.
Over the past year, the author chronicles a hands‑on journey from a fresh graduate to a cloud‑native specialist, detailing the design and implementation of an enterprise‑grade Kubernetes architecture—including multi‑cluster logging, CI/CD pipelines, Istio service mesh, monitoring, and private‑deployment strategies—while sharing practical lessons learned.
This article introduces six popular open‑source Spring Cloud microservice projects, detailing their core features, technology stacks, and providing repository links and screenshots to help developers quickly study and adopt enterprise‑grade microservice architectures.
A 2021 Forrester survey of 422 Chinese developers reveals how cloud‑native technologies such as containers, Kubernetes and Serverless are reshaping development roles, boosting productivity, and driving a shift from traditional on‑premise coding to a fully cloud‑native, edge‑enabled ecosystem, while highlighting emerging challenges and opportunities.
This article explains the fundamental concepts of Kubernetes—including what pods are, how they manage related services, the underlying networking and storage mechanisms, and the roles of ReplicaSet, Deployment, and StatefulSet in scaling and updating both stateless and stateful applications.
The article summarizes key insights from the 2021 GIAC Cloud Native conference, covering strategies to limit service explosion radius, SkyWalking-based Kubernetes event monitoring, Kuaishou's Service Mesh implementation, and Dubbogo 3.0's innovations such as proxyless mesh and adaptive throttling.
The article analyzes why a company's clusters were unstable—unstable release process, missing monitoring and logging, insufficient documentation, and unclear request routing—and proposes a comprehensive solution built around Kubernetes‑centric CI/CD, a federated Prometheus monitoring platform, Elasticsearch logging, centralized documentation, and Kong/Istio traffic management.
Docker announced a subscription‑based Business edition of Docker Desktop, outlining its enterprise‑focused features, pricing, the continued free Personal tier, and a detailed look at the platform’s architecture, workflow, and the company’s turbulent growth and two perceived “deaths.”
This step‑by‑step tutorial shows how to set up a two‑node Kubernetes cluster, install OpenYurt, deploy the eKuiper edge stream‑processing engine and its manager UI on the cloud node, and configure a Yurt tunnel so the cloud dashboard can securely manage eKuiper instances running on the edge node.
Clusternet is an open‑source cloud‑native Kubernetes multi‑cluster management project that enables seamless registration, synchronization, and deployment of applications across public, private, hybrid, or edge clusters using lightweight agents and hubs, supporting various sync modes, RBAC, and kubectl plugins.
This article explains the internal architecture of Nacos, its role as a service registry in Spring Cloud, the registration and heartbeat mechanisms, and how clients dynamically discover service instances using both Open API and SDK approaches.
The 8.11 Midway face‑to‑face livestream recap highlights a year of componentization, serverless evolution, progressive design, new mini‑program cloud development, Vercel support, GitHub Actions, code generation, and the preview of Midway 3.x, outlining the framework's roadmap and community contributions.
KubeSphere builds a cloud‑native container management system atop Kubernetes, offering multi‑cloud, multi‑cluster management, declarative APIs, and RBAC‑based permission control through its core components ks‑console, ks‑apiserver, and ks‑controller‑manager, while leveraging CustomResources, controllers, and Go‑restful for extensible, secure operations.
This article explains how Dubbo 3.0 adopts an application‑level service discovery mechanism to dramatically reduce memory and registry overhead, details the full server‑exposure workflow—including injvm, service‑discovery‑registry, Triple and MetadataService steps—and provides concrete code snippets and diagrams for each phase.
The 2020 IDC report shows Alibaba Cloud leading China’s relational database market with over 28% share, pioneering cloud‑native solutions like PolarDB and RDS, while public‑cloud deployments surpass traditional on‑premises databases, a trend expected to reach 73.5% by 2025.
This article explains the limitations of a traditional Prometheus‑based monitoring stack for Kubernetes, demonstrates how integrating Thanos improves metric retention, scalability, and storage cost, and provides a complete multi‑cluster deployment example with Terraform and Helm configurations.
This article explains what GitOps is, its core principles such as declarative configuration and versioned state, the operational benefits it brings—including improved visibility, productivity, reliability, and security—and provides step‑by‑step guidance on implementing GitOps workflows for cloud‑native applications.
NetEase Media details its year‑long journey building a cloud‑native container platform—covering foundational concepts, a robust infrastructure framework, Kubernetes deployment, solutions to pre‑containerization challenges, and practical best practices such as graceful shutdowns, health probes, and resource‑limit configurations.
The article outlines the latest OCM 0.4.0 release—including addon registration, a new Placement API with YAML examples, the alpha‑stage clusteradm CLI—while previewing the 0.5.0 roadmap, integrations with KubeVela, ArgoCD, Clusternet, and real‑world deployments on Alibaba Cloud.
This article provides a detailed tutorial on setting up an NFS server, configuring a Kubernetes deployment of Nginx with NFS volume mounts, and explains static versus dynamic persistent storage in K8s, complete with command examples and YAML configuration.
This article reviews the current state of Kubernetes horizontal and vertical autoscaling, compares HPA, VPA, and KNative KPA, discusses their limitations, and proposes short‑ and long‑term ideas for a more dynamic, low‑ops scheduling system.
This article surveys eleven essential open‑source tools for Kubernetes, grouping them into three categories—running clusters, accelerating feedback loops, and enriching IDE experiences—while explaining each tool’s purpose, key features, and practical usage tips for developers and operators.
This article explains the recent US export restrictions on Docker, highlights the need for open‑source replacements, and provides detailed overviews of ten prominent Docker alternatives—including Podman, LXC, RKT, OpenVZ, Rancher, Nanobox, Singularity, Kubernetes, OpenShift, and Apache Mesos—covering their key capabilities, security aspects, and platform support.
This article introduces Apache APISIX, examines the challenges of using it as a data‑plane in a service‑mesh architecture, presents the apisix‑mesh‑agent as an intermediary solution, and outlines the advantages, design, and future roadmap of a APISIX‑based cloud‑native service mesh.
This article chronicles SegmentFault's evolution from a single‑instance VPS to a cloud‑native platform on KubeSphere, explaining why Kubernetes was chosen, how front‑end/back‑end separation reshaped the system, and the operational lessons learned for cost‑effective, automated deployments.
This tutorial walks through pulling the MySQL image, creating NFS‑backed PersistentVolume and PersistentVolumeClaim, deploying MySQL on Kubernetes, verifying the pod, inserting sample data, and confirming the data is stored on the NFS server.
The article describes how a bank built a Kubernetes‑based, containerized MySQL service platform (CDD) to improve database high availability, resource utilization, automated operations, and agile delivery by addressing network, storage, scheduling, and management challenges through custom networking, hybrid storage, scheduler extensions, and multi‑AZ deployment.
This article explains the fundamental principles of Kubernetes core components—including pods, their networking and storage mechanisms, the role of ReplicaSets for scaling, how Deployments enable rolling updates, and how StatefulSets manage stateful services—providing clear insights and visual diagrams for each concept.
This article explains how Kuaishou's Y‑Tech team designs a server‑side video‑effects platform that tackles high computational load, real‑time constraints, and resource limits by adopting asynchronous workflows, task‑queue scheduling, and cloud‑native serverless frameworks such as Netflix Conductor and Knative.
This guide explains the relationship between Pods and controllers, introduces Kubernetes Deployments for managing stateless applications, and provides a complete YAML example to create a Tomcat Deployment with three replicas and a NodePort Service, followed by the kubectl command to apply the configuration.
This article explains the design, model, and practical usage of Alibaba's open‑source ChaosBlade and its platform chaosblade‑box, detailing how a unified chaos experiment model enables scalable, multi‑environment fault injection for cloud‑native systems and improves high‑availability testing.
The 2021 Sysdig report analyzes millions of containers to uncover short lifespans, shifting runtime choices, rising use of Prometheus, prevalent security misconfigurations, image‑scanning practices, and emerging threats, offering actionable insights for organizations managing cloud‑native workloads.
This article provides a comprehensive introduction to Docker, covering its fundamental concepts, differences from virtual machines, step‑by‑step installation, creating Dockerfiles, building and running container images, publishing to registries, and practical best‑practice recommendations for modern cloud‑native development.
The article compiles expert experiences from major Chinese tech firms on progressive system refactoring, platform‑centric redesign, service‑oriented evolution, and high‑performance architecture, highlighting practical steps, technology choices, and lessons learned for modern backend and operations engineering.
This article explains how to deploy the ChaosBlade Operator on a KubeSphere cluster, define and run various chaos experiments—such as CPU overload, network latency, packet loss, and process kill/stop—against RadonDB MySQL containers, and verify the impact to improve system resilience and fault‑tolerance.
This article introduces OPPO's self‑developed data lake storage system CBFS, covering the fundamentals of data lake storage, the multi‑layer CBFS architecture, its core technologies such as metadata management and erasure coding, and future directions for large‑scale, low‑cost data analytics.
This article chronicles the four‑year evolution of Baidu's Fengjing performance‑monitoring platform, detailing its data collection, processing pipelines, successive architectural versions (1.0‑4.0), challenges such as probe intrusion and massive data volume, and the engineering solutions that enabled large‑scale, low‑cost, cloud‑native observability for thousands of Java services.
This article explains Kubernetes controllers, the relationship between pods and controllers, deployment use cases, YAML file handling, and provides step‑by‑step kubectl commands for creating, exposing, scaling, upgrading, and rolling back deployments in a cloud‑native environment.
This article examines Netflix’s open‑source Spinnaker platform, detailing its microservice architecture, GitHub‑based code management, GitHub Actions continuous‑integration workflow, and Halyard‑driven deployment process, including sample build.yml and version.yaml configurations, offering practical insights for cloud‑native DevOps implementations.
Qunar shares how it built a large‑scale chaos engineering platform for thousands of microservices, detailing tool selection, architecture, evolution stages, fault‑injection scenarios, strong/weak dependency automation, open‑source contributions, and future plans for automated random drills.
This guide explains how to allocate CPU and memory to containers and pods in Kubernetes, clarifies resource units, demonstrates practical Deployment, ResourceQuota, and LimitRange configurations with YAML examples, and lists useful tools for monitoring and enforcing resource constraints.
This guide explains how to configure Jenkins to connect to both same‑cluster and cross‑cluster Kubernetes environments, covering role bindings, network ports, certificate generation, Kubernetes cloud settings, pod template configuration, and testing via freestyle and pipeline jobs.
The Kubernetes 1.22 release introduces 53 enhancements—including GA Server‑Side Apply, stable external credential providers, etcd 3.5.0, memory QoS, Windows support, seccomp defaults, and numerous API deprecations—while shifting the release cadence to three major versions per year to balance development workload and user adoption.
This guide walks through deploying the NFS‑subdir‑external‑provisioner on Kubernetes, covering migration to the new repository, configuring storage classes with subdirectory support, applying RBAC resources, creating PVCs, enabling high‑availability with leader election, and troubleshooting common mount errors.
This article analyzes the evolution of Baidu's advertising data storage, detailing the business-driven requirements, the design and development of the BaikalDB distributed database, its architecture across storage, compute and scheduling layers, key features such as Raft replication and multi‑index support, and the lessons learned for building cloud‑native, high‑performance databases.
Kubernetes announced a new release cadence, moving from four to three annual versions to reduce contributor workload, ease downstream adoption, and focus on higher release quality, with detailed policy changes and a predicted 2021 schedule.
This article explains the concept of microservices, compares them with traditional monolithic web applications, outlines their advantages and challenges, and introduces first‑generation frameworks like Spring Cloud and Dubbo as well as next‑generation service‑mesh solutions such as Linkerd, Envoy, Istio, and Conduit, especially in Kubernetes environments.
The article explains why Go is gaining popularity, highlighting its superior execution performance, high development efficiency, and extensive adoption by leading companies in cloud infrastructure, microservices, and open‑source projects such as Docker, Kubernetes, and many Chinese tech firms.
The article describes a virtual environment solution that uses traffic coloring and routing to enable independent branch testing for micro‑services, improving development efficiency, reducing test costs, and supporting HTTP, RPC, and MQ protocols within a cloud‑native infrastructure.
At ServerlessDays China 2021, leaders from AWS, Alibaba Cloud, ByteDance and Tencent Cloud examined serverless concepts, showcased cost‑saving implementations, discussed cold‑start optimizations, identified adoption hurdles such as tooling and lock‑in, and forecasted a future where serverless becomes a ubiquitous, hyper‑unified compute model integrating cloud, edge and storage.
This article describes how Baidu engineered a flexible, multi‑level fault‑tolerant architecture—including dynamic retry scheduling, multi‑recall coordination, ranking layer degradation, and cross‑IDC multi‑master storage—to achieve five‑nine availability for its massive feed recommendation service.
