Mastering Internet Operations: Roles, Responsibilities, and Evolution

Internet operations focus on service, emphasizing stability, security, and efficiency to ensure 24/7 high‑quality service for users.

Operations engineers strengthen the stability of the underlying infrastructure, basic services, and online applications by conducting daily inspections, identifying potential risks, optimizing architecture to prevent common failures, and improving disaster‑recovery capabilities through multi‑data‑center integration. Monitoring, log analysis, and other techniques enable rapid fault detection and response, reducing downtime and meeting availability targets.

In terms of security, engineers address all layers of the stack to ensure users can safely and completely access online services. This includes network boundary segmentation, ACL management, traffic analysis, DDoS mitigation, OS and open‑source software vulnerability scanning and patching, application‑level defenses such as XSS and SQL injection protection, security process definition, code scanning, permission audits, intrusion detection, and business risk control, thereby safeguarding company and user data while resisting malicious attacks.

Beyond stability and security, operations also aim for high efficiency. Optimizations such as I/O tuning for database performance and image compression to reduce bandwidth usage deliver maximum user value with minimal resources. Tooling and platforms further accelerate product releases and improve internal operational efficiency.

Operations Work Classification

As internet businesses grow, mature companies subdivide operations roles. The typical classification (see diagram) includes system operations, application operations, database operations, operations security, and operations R&D, each with specific responsibilities.

System Operations

System operations manage IDC, network, CDN, and basic services (LVS, NTP, DNS), as well as asset management, server selection, delivery, and maintenance.

IDC Data Center Construction

Collect business requirements, estimate future data‑center scale, and evaluate factors such as backbone network distribution, building architecture, Internet access, attack defense, expansion capacity, space reservation, dedicated lines, and on‑site support to select and build appropriate data centers.

Network Construction

Design and plan production network architecture, including data‑center, transport, and CDN networks, and perform daily network tuning.

LVS Load Balancing and SNAT Construction

Build load‑balancing clusters based on traffic volume and business needs, providing high‑performance, high‑availability traffic distribution and unified network‑level attack protection. SNAT offers centralized public‑access services with high performance and availability.

CDN Planning and Construction

Handle third‑party and self‑built CDN, select and schedule third‑party CDN, plan new CDN node layouts, maintain CDN services and monitoring, ensure stability and efficiency, analyze file characteristics for optimal acceleration strategies, and troubleshoot CDN issues.

Server Selection, Delivery, and Maintenance

Test and select servers, conduct component and workload testing, reduce power consumption, increase rack density, promote new hardware and solutions, diagnose hardware faults, and develop monitoring tools.

OS, Kernel Selection and Maintenance

Select and customize operating systems, optimize kernels, manage patches and internal releases, maintain YUM repositories, handle OS‑related incidents, and provide targeted optimization support.

Asset Management

Record and manage physical resources such as data centers, networks, cabinets, servers, ACLs, and IPs, establish accurate processes, and expose APIs for automation.

Basic Service Construction

Design highly available architectures for DNS, NTP, SYSLOG, and other foundational services to avoid single points of failure.

Application Operations

Application operations handle online service changes, monitoring, disaster recovery, data backup, routine inspections, and emergency response.

Design Review

Participate in product design reviews to ensure high‑availability requirements are met from an operations perspective.

Service Management

Define upgrade, rollback plans, implement changes, track service dependencies, detect defects, set stability metrics, improve monitoring accuracy, and respond to incidents promptly.

Resource Management

Manage server assets, assess data‑center distribution, network bandwidth, and allocate resources according to service needs.

Routine Checks

Establish and continuously improve service inspection points, conduct regular checks, and investigate any discovered issues.

Plan Management

Set thresholds for monitoring and system metrics, create and update response plans, and conduct regular drills.

Data Backup

Develop backup strategies, perform backups according to standards, ensure data availability and integrity, and conduct regular recovery tests.

Database Operations

Database operations design storage solutions, schema, indexes, and optimize SQL, while handling changes, monitoring, backup, high availability, and automation.

Design Review

Participate in early‑stage design reviews to propose storage, schema, SQL standards, and index strategies that meet high‑availability and performance goals.

Capacity Planning

Understand database capacity limits, identify bottlenecks, and perform optimization, sharding, or scaling before reaching limits.

Data Backup and Disaster Recovery

Define backup and DR strategies, execute regular recovery tests, and ensure backup usability and completeness.

Database Monitoring

Implement health and performance monitoring to promptly detect database issues.

Database Security

Establish account systems, enforce strict permissions, manage offline backup data, and reduce risks of accidental operations and data leakage.

High Availability and Performance Optimization

Design failover solutions for single‑point failures, continuously optimize performance through new storage, hardware, filesystem, database, and SQL improvements while controlling costs.

Automation System Development

Develop automated database operation systems covering deployment, auto‑scaling, sharding, permission management, backup/recovery, SQL review, and failover.

Operations R&D

Design and develop generic operation platforms such as asset management, monitoring, and data‑permission systems, providing APIs for automation.

Operations Platform

Record and manage services and their relationships, enabling automated, workflow‑driven daily operations like machine management, restart, rename, initialization, domain management, traffic switching, and plan execution.

Monitoring System

Design and develop monitoring to collect, alert, store, analyze, and visualize server and network metrics, improving timeliness, accuracy, and intelligence of alerts.

Automated Deployment System

Participate in developing automated deployment tools, handling data, permissions, API development, and web interfaces, and provide PaaS‑style high‑availability platforms integrated with cloud computing.

Operations Security

Operations security strengthens network, system, and business layers through regular scanning, penetration testing, tool development, and incident response.

Security Policy Establishment

Develop practical security policies based on internal processes.

Security Training

Provide targeted security training and assessments, establishing security responsibilities across the organization.

Risk Assessment

Conduct black‑box and white‑box testing to produce comprehensive risk assessments for networks, servers, applications, and user data.

Security Construction

Reinforce weak points based on risk results, deploy security devices, apply patches, defend against viruses, perform source‑code scanning, and offer security consulting, using encryption, anonymization, and data deletion to protect data value.

Security Compliance

Handle external compliance requirements such as payment licensing.

Emergency Response

Establish security alert systems, collect third‑party findings, coordinate remediation, assess impact, and investigate root causes.

Operations Work Development Process

Early teams performed basic data‑center, network, and server tasks with minimal online service involvement.

As products matured, teams added server monitoring and 4/7‑layer operations (LVS, Nginx), using manual or simple scripts for service changes and open‑source monitoring tools.

Increasing scale led to division into system and application operations; application teams took over service monitoring, backup, change management, and began building automation tools.

Further growth required multi‑data‑center disaster recovery, plan management, and advanced security measures, resulting in five major categories: system operations, application operations, database operations, operations security, and operations R&D.