What's changed: Deepened SAP-C02 Chapter 4 (added comparison tables, scenarios, FAQs, exam traps, deep-dive paragraphs to each section; localized figures to Japanese)
4.1Choosing a Migration Strategy (The 7 Rs)
Understand migration approaches—the 7 Rs (rehost/replatform/refactor/repurchase/retire/retain/relocate) and assessment via Migration Hub/Application Discovery Service. Pick the best path per workload.
Large migrations start by assessing the portfolio, then assigning each app a strategy from the 7 Rs. Effort and value trade off.
4.1.1The 7 Rs
- Rehost (lift & shift): move to EC2 unchanged; fastest, least effort (automated by AWS MGN).
- Replatform: minor optimization (e.g., self-managed DB → managed RDS).
- Refactor: rebuild cloud-native (serverless/microservices); high effort, high value.
- Repurchase: drop self-hosting for SaaS. Retire: decommission the unneeded. Retain: keep for now. Relocate: move as-is.
Common on SAP-C02: fast, no change = rehost (lift & shift, MGN), small optimization like managed DB = replatform, cloud-native rebuild = refactor, go SaaS = repurchase, decommission = retire / keep = retain; assessment = Discovery Service + Migration Hub. Rehost for speed/low risk, refactor for long-term value.
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