43 lines
1.2 KiB
Markdown
43 lines
1.2 KiB
Markdown
---
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title: "EFS Infrequent Access"
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type: concept
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tags: [AWS, EFS, Storage, Cost-Optimization]
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sources: []
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last_updated: 2026-04-19
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---
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## Definition
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EFS Infrequent Access（EFS 不频繁访问层）是 AWS EFS 的一种存储层，适合很少访问的文件，通过生命周期策略自动将冷文件移动到低成本的存储层。
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## Key Features
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- **成本节省**：比标准层低约 85%
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- **自动分层**：通过生命周期策略自动转移
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- **即时访问**：访问不频繁访问层数据时自动移回标准层
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- **最小计费对象**：128KB 以下文件不计费
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## Pricing
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| 存储类型 | 价格（每 GB/月） |
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|---------|----------------|
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| 标准层 | $0.30 |
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| 不频繁访问层 | $0.045 |
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## Lifecycle Policy
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```json
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{
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"LifecyclePolicies": [
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{
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"TransitionToIA": "After 30 days of last access"
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}
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]
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}
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```
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## Considerations
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- **最小计费对象大小**：128KB 以下文件计费为 128KB
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- **访问成本**：检索数据时有额外的访问费用
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- **适合场景**：日志文件、备份文件、归档数据
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## Connections
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- [[EFS-Standard]] ← extends ← [[EFS]]
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- [[Lifecycle-Policy]] → implements → [[EFS-Infrequent-Access]]
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- [[AWS]] ← provides ← [[EFS-Infrequent-Access]] |