Cloud Migration Guide

Migrating to the cloud is one of the most impactful decisions your business can make. Done well, it improves reliability, agility, and cost efficiency. Done poorly, it can cause downtime, data loss, and budget overruns. This guide provides a proven, step-by-step framework for migrating your Hong Kong workloads to Hong Kong Info Cloud with minimal risk.

遷移到雲端是您的企業所能做出的最具影響力的決策之一。做得好，可以提高可靠性、敏捷性和成本效益；做得不好，則可能導致停機、數據丟失和預算超支。本指南為您提供一套經過驗證的、循序漸進的框架，讓您的香港工作負載以最低風險遷移到香港資訊雲。

Step 1Assess and Inventory

第一步：評估與盤點

Before moving anything, build a complete picture of your existing environment. Document every application, database, dependency, and data volume. For each one, record the owner, business criticality, peak usage patterns, and compliance requirements. Identify which workloads are ready for the cloud today and which need more preparation. This inventory becomes the foundation of your migration plan and helps you set realistic timelines and budgets.

在移動任何東西之前，先建立您現有環境的完整藍圖。記錄每一個應用程式、資料庫、依賴關係和數據量，並為每一項寫下負責人、業務重要性、尖峰使用模式和合規要求。確定哪些工作負載目前已具備遷移雲端的條件，哪些還需要更多準備。這份盤點清單將成為您遷移計劃的基礎，並幫助您制定切實可行的時間表和預算。

Step 2Choose the Right Strategy

第二步：選擇合適的策略

Not every workload should move the same way. Industry practice groups migration approaches into six strategies, commonly called the Six Rs: Rehost, Replatform, Refactor, Repurchase, Retire, and Retain. Rehosting is the fastest path for stable applications, while refactoring delivers the best long-term value but takes longer. Choose honestly, workload by workload, based on business value and effort.

並非所有工作負載都應該以相同方式遷移。行業慣例將遷移方法歸納為六項策略，即「6R」原則：重新託管（Rehost）、調整平台（Replatform）、重構（Refactor）、重新購買（Repurchase）、淘汰（Retire）與保留（Retain）。對於穩定的應用程式，重新託管是最快的途徑；重構能帶來最佳的長期價值，但需要更長時間。請按照實際的業務價值和工作量，逐項工作負載誠實地作出選擇。

Step 3Put Security First

第三步：安全優先

Plan security before you move any data. Define roles in your new cloud environment and apply the principle of least privilege. Enable encryption for data at rest and in transit, enable multi-factor authentication for all administrative accounts, and configure network isolation between environments. If your workloads process personal data, design your controls from day one to satisfy the Hong Kong Personal Data (Privacy) Ordinance (PDPO), including keeping data within Hong Kong data centers.

在移動任何數據之前，請先規劃安全措施。在新雲端環境中定義角色，並遵循最小權限原則；為靜態及傳輸中的數據啟用加密；為所有管理帳戶啟用多重身分驗證；並在各環境之間配置網絡隔離。如果您的工作負載處理個人數據，請從第一天起就設計相應的管控措施，以符合香港《個人資料（私隱）條例》（PDPO），包括將數據存放在香港數據中心內。

Step 4Plan the Data Transfer

第四步：規劃數據傳輸

Choose your transfer method based on data volume and time available. For large datasets, run an initial seed transfer during off-peak hours, then sync incremental changes until cutover. Verify bandwidth, latency, and associated transfer costs before you start. Never copy production data during busy periods, and agree on a cutover window that always leaves room for rollback if something unexpected happens.

根據數據量和可用時間選擇傳輸方式。對於大型數據集，請在離峰時段進行首次種子傳輸，然後持續同步增量變更直至交接。開始前務必確認頻寬、延遲及相關傳輸成本。切勿在繁忙時段複製生產數據，並設定一個隨時保留回滾空間的交接窗口，以防出現意外情況。

Step 5Test Thoroughly

第五步：全面測試

Run a full pilot migration to a staging environment before touching production. Validate application functionality, data integrity, performance, and security controls against a documented checklist. Test your rollback playbook as well, because the ability to restore the previous environment instantly is your safety net. Only proceed to production when every staged test has passed.

在觸碰生產環境之前，先進行一次完成的試點遷移到預演環境。按照書面核對清單驗證應用程式功能、數據完整性、效能和安全控制。同時也要測試您的回滾方案，因為能即時還原舊環境的能力就是您的安全保障。只有在所有預演測試通過之後，才可進入生產環境。

Step 6Migrate in Phases

第六步：分階段遷移

Do not attempt a big-bang migration. Move non-critical workloads first, learn from each wave, and apply those lessons to the next. Use automation and configuration-management tools to keep every migration consistent and repeatable. Communicate the timeline clearly to users, and keep a dedicated support channel open throughout the process.

切勿嘗試「一步到位」式的遷移。先遷移非關鍵工作負載，從每一波中學習，並將經驗應用到下一階段。使用自動化與配置管理工具，確保每次遷移都一致且可重複。向用戶清楚說明時間表，並在整個過程中保持專屬支援頻道暢通。

Step 7Go Live and Optimize

第七步：上線與優化

Once production workloads are live, verify the cutover, confirm backups are running, and monitor performance closely for the first 72 hours. Then shift to optimization: right-size your resources, tune auto-scaling policies, and review costs against budget. Finally, document the new environment thoroughly so your team can operate and improve it independently.

生產工作負載上線後，請核實交接是否完成、確認備份正常運行，並在首 72 小時內密切監控效能。之後便可轉入優化階段：調整資源規模、調校自動擴展策略，並將成本與預算進行對照檢視。最後，請完整記錄新環境，讓您的團隊可以獨立營運並持續改善。

Final Checklist

最終檢查清單

• Complete inventory of workloads, owners, and dependencies 已完成工作負載、負責人及依賴關係盤點
• Strategy selected for every workload (Six Rs) 已為每項工作負載選擇策略（6R）
• Security controls and PDPO compliance reviewed 已檢視安全控制及 PDPO 合規
• Transfer plan with cutover and rollback windows defined 已定義交接與回滾窗口的傳輸計劃
• Staging tests passed for all applications 所有應用程式已通過預演測試
• Backups verified and monitoring alerting configured 已確認備份並配置監控告警

Ready to Begin?

準備好開始了嗎？

Migration is a journey, not a single event. With careful planning, phased execution, and continuous optimization, your organization will realize the full benefits of the cloud. Hong Kong Info Cloud offers end-to-end migration assistance, including planning, data transfer, testing, and go-live support.

遷移是一段旅程，而不是一次性事件。透過周詳規劃、分階段執行和持續優化，您的機構將全面實現雲端的所有優勢。香港資訊雲提供端到端的遷移支援，涵蓋規劃、數據傳輸、測試與上線協助。

This guide is provided for general information and does not constitute professional advice. Contact the Hong Kong Info Cloud team for guidance specific to your environment.本指南僅供一般參考，不構成專業意見。如需針對您環境的建議，請聯絡香港資訊雲團隊。

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