---
title: "What-If Simulation"
tags:
  - devops
  - architecture
  - decision-support
  - ai
  - cloud-migration
created: 2026-04-25
---

# What-If Simulation

## Definition

What-If Simulation 是 Agentic AI 模拟架构变更（如云迁移、实例类型变更）对**性能、成本和合规**的影响，支持数据驱动的决策。

## 应用场景

| 场景 | 模拟内容 | 决策支持 |
|------|---------|---------|
| 云迁移 | AWS → GCP 迁移影响 | 性能/成本/合规权衡 |
| 实例变更 | m5.xlarge → m5.large | 性能影响评估 |
| 架构重构 | 单体 → 微服务 | 复杂度/收益分析 |
| 多云策略 | 工作负载分配 | 成本优化建议 |

## Agentic AI What-If Simulation 工作流

```
1. Define Scenario → "Moving from AWS EKS to GCP GKE"
2. Gather Baseline → 当前性能/成本/合规指标
3. Model Impact → AI 基于历史数据和预测模型
4. Generate Report → 性能差异/成本差异/风险评估
5. Recommend → 最优方案 + 实施路径
```

## 示例

> An AI agent simulates moving an AWS-based SaaS application to GCP's Private Cloud in KSA (Saudi Arabia):
>
> **Performance Impact**: 
> - Latency: +45ms (KSA → GCP EU)
> - Availability: 99.9% → 99.95% (enhanced SLA)
>
> **Cost Impact**:
> - Compute: -20% (GCP preemptible pricing)
> - Egress: +15% (cross-region data transfer)
> - Net: -12% annual savings
>
> **Compliance Impact**:
> - Data Sovereignty: ✅ KSA data residency satisfied
> - SLA: ✅ GCP private cloud meets enterprise agreement
>
> **Recommendation**: Proceed with migration, implement CDN for latency optimization

## 与 [[Multi-Cloud Strategy]] 的关系

What-If Simulation 是 [[Multi-Cloud Strategy]] 决策支持的核心工具：

```
Multi-Cloud Strategy Process:
├── Assess → 评估多云需求
├── Plan → What-If Simulation ←  # ← 本页
├── Execute → 实施迁移
└── Optimize → 持续成本/性能优化
```

## Related Concepts

- [[Multi-Cloud Strategy]] — What-If Simulation 支持多云决策
- [[Cloud Migration]] — 主要应用场景
- [[Cost-Benefit Analysis]] — 类似分析方法
- [[Decision Framework]] — 决策支持的通用框架

## Related Sources

- [[how-agentic-ai-can-help-for-cloud-devops]]
- [[how-can-a-multi-cloud-strategy-transform-your-business-roi]]