In 2026, cloud migration has become a strategic priority for businesses seeking scalability, flexibility, and cost efficiency. According to Gartner, more than 85% of organizations now operate with a cloud-first approach, as cloud infrastructure continues to outperform traditional on-premise systems in both performance and agility. As a result, companies that delay cloud adoption risk falling behind in an increasingly competitive digital landscape.
Cloud migration refers to the process of moving applications, data, and workloads from on-premise environments to the cloud. With multiple migration strategies available, choosing the right approach is critical to ensuring a smooth transition and maximizing return on investment.
In this article, we’ll explore the different types of cloud migration strategies, their key characteristics, and the challenges organizations may face during the migration process. By the end, you’ll have a clear understanding of how to select the most suitable strategy for your business needs.
明確なクラウド移行戦略
An organization’s 高レベルの計画 for moving its current on-premises and/or co-located application workloads and the data they generate into the cloud is known as a cloud migration strategy. The majority of plans contain a strategy for moving to a public cloud provider, such as Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, or another. Not all workloads are appropriate for migration, even if the majority of workloads will benefit from cloud migrations.
移行対象のワークロードを優先順位付けし、それぞれに最適な移行手法を選択することは、企業のクラウド移行戦略を成功させる上で不可欠な要素です。この戦略はパイロットでテストされ、その結果に基づいて調整されます。チームをプロセスに導き、必要に応じてロールバックできるようにするために、クラウド移行戦略ドキュメントも作成する必要があります。.
理想的な結果は、アプリケーションの可用性や通常のビジネス活動を妨げることなく、現在のオンプレミス インフラストラクチャから必要なクラウド アーキテクチャにアプリケーションをスムーズに移行することです。.
なぜクラウド移行戦略を適用する必要があるのでしょうか?
A cloud migration strategy can provide immense insight for transitioning from on-premises to the cloud. It enables organizations to identify which application workloads should be continued, rewritten, or replaced and also evaluates suitable target clouds for each one. As such, enterprises stand to benefit immensely by combining various approaches included in a comprehensive enterprise cloud migration plan into their operations reducing costs while minimizing disruption at the same time.
Regarding the benefits of cloud migration, you could also read this blog post.
Types Of Cloud Migration Strategy The 6 R’s
一般的に、 最も一般的な6つのクラウド移行戦略:
1/ 再ホスト（リフトアンドシフト）
リホストとは、現在オンプレミスでホストしているコンテンツをクラウドに移行するという基本的な戦略です。現在の環境の正確な複製を、同種のクラウド環境に移行します。通常、この戦略では、アーキテクチャの大幅な変更や再構成は必要ありません。クラウドでホストしても、オンプレミス環境で機能していたすべての機能は、同じように機能し続けるはずです。.
2/ プラットフォームの再構築
Re-platform is a cutting-edge approach to cloud migration that takes lift & shift further. It gives developers the opportunity to optimize applications, so they perform faster and better in their new environment while ensuring total integration with the cloud’s architecture. With re-architecture comes an added level of complexity: programming expertise is essential for successful transition.
3/ 買い戻し
Repurchase provides an opportunity to shift your work environment into the cloud. Yet, while this allows you to replace legacy applications with SaaS solutions, it presents a challenge: team members must be retrained and become familiarized on the new platform not something easily done. Apart from that, moving licenses from local servers to cloud-based servers is an alternative course of action for the repurchase strategy.
4/ 保持する
現時点では、本格的なクラウド移行が貴社のニーズに合わない場合は、ハイブリッドソリューションを選択するという選択肢もあります。これは、インフラの一部をオンサイトで維持しつつ、特定のコンポーネントをクラウド環境でホストするものです。これは、後々クラウドへの移行を再検討する際にも役立ちます。.
5/ 引退
If you don’t see any value in a certain application or service for your customers, there’s no need to keep it around. It might be wise to simply turn it off instead of wasting time and resources migrating it into the cloud.
6/ リファクタリング
将来の技術革新に対応するために、企業は既存アプリケーションのリファクタリングも検討できます。クラウド環境向けにアプリケーションを再設計するために必要な時間とリソースを投資することで、新たなイノベーションとの互換性を確保しながら、潜在的な成長を見据えてアクセシビリティを向上させることができます。.
クラウド移行戦略の課題
パブリッククラウドへの移行を目指す組織には、ワークロード、インフラストラクチャ、運用を考慮した綿密な戦略が必要です。これらの要素を慎重に検討しなければ、移行は失敗や遅延につながる可能性があります。移行を成功させるには、開発チームとの連携が不可欠となる場合が多くあります。.
When making the transition to cloud infrastructure, it’s also important to plan for how legacy servers and applications will be managed. Certain applications might lend themselves well towards migration – but others may not fit so easily into a new environment. Careful consideration should also go into what happens when hardware has reached its end-of-life, as this can have an impact on data center space optimization plans.
一般的には、 3つの重要な要素 組織がクラウド移行戦略を実行する際に注意する必要がある点は次のとおりです。
+ セキュリティ：クラウド移行において、セキュリティは依然として最優先事項です。企業は、コンプライアンス要件を満たしながら、アプリケーションとデータの安全性を確保する必要があります。.
+ Governance and Compliance: By region and sector, regulations change significantly. The storage of an organization’s data in the cloud can be physically safe, but the cloud client is still responsible for making sure that legal requirements for data privacy and retention are met.
+ Cost Management: Keep the cloud clean and organized de-provision unused accounts, workloads, and data to reduce wasted resources from applications being duplicated needlessly. This helps avoid costly cloud sprawl by staying ahead of resource consumption.
結論
Cloud migration is a complex process that requires careful planning, the right strategy, and a clear understanding of your workloads, infrastructure, and business goals. By addressing key factors such as security, governance, compliance, and cost management, organizations can ensure a smooth transition and fully leverage the benefits of the cloud.
Want to migrate to the cloud with confidence and minimize risks? 私たちとつながる for a free consultation and discover how Eastgate Software can support your cloud journey with tailored, scalable solutions.
