가상 프라이빗 클라우드 (VPC / Virtual Private Cloud)
클라우드 내의 독립된 네트워크 공간.
Triggers: 1. Lossy compression. 2. Schema normalization/denormalization. 3. Physical hardware destruction. 4. One-way hashing.
graph LR
Center["가상 프라이빗 클라우드 (VPC / Virtual Private Cloud)"]:::main
Rel_rpc_node["rpc-node"]:::related -.-> Center
click Rel_rpc_node "/terms/rpc-node"
Rel_sandboxing["sandboxing"]:::related -.-> Center
click Rel_sandboxing "/terms/sandboxing"
classDef main fill:#7c3aed,stroke:#8b5cf6,stroke-width:2px,color:white,font-weight:bold,rx:5,ry:5;
classDef pre fill:#0f172a,stroke:#3b82f6,color:#94a3b8,rx:5,ry:5;
classDef child fill:#0f172a,stroke:#10b981,color:#94a3b8,rx:5,ry:5;
classDef related fill:#0f172a,stroke:#8b5cf6,stroke-dasharray: 5 5,color:#94a3b8,rx:5,ry:5;
linkStyle default stroke:#4b5563,stroke-width:2px;
🧒 5살도 이해할 수 있게 설명
거대한 공공 공원(클라우드) 안에 나만의 '담장이 있는 개인 정원'을 빌리는 것과 같아요. 공원 안에 있지만 전용 대문과 규칙이 있어서, 내가 허락한 사람 외에는 아무도 들어올 수 없게 네트워크를 보호할 수 있습니다.
🤓 Expert Deep Dive
Technically, irreversible migrations occur when the 'State Transition' is non-isomorphic. For example, moving from a 'Relational' database to a 'Key-Value' store often involves 'Flattening' data, which destroys the relational schema metadata. In blockchain, a 'Hard Fork' that changes the transaction format is irreversible for nodes that adopt the new rules; they can no longer validate the old chain without a separate 'Replay' mechanism. The primary mitigation strategy for irreversible migrations is 'Shadow Migration', where the new system runs in parallel with the old one for a verification period before the 'Terminal Switchover' occurs. Another approach is 'Expansion-Contract' (Parallel-run), where you add the new fields first, migrate data, and only delete the old fields months later.