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description: Elastic File System
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# EFS

• Managed NFS (network file system) that can be mounted on 100s of EC2&#x20;

• EFS only works with Linux EC2 instances in multi-AZ&#x20;

• Highly available, scalable, expensive (3x gp2), pay per use, no capacity planning

<figure><img src="https://1722711354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwNXdoUkfmcozr29fRrfb%2Fuploads%2Fxm6eqKu7ZFhpU2UwY8za%2FScreenshot%202023-12-01%20at%2000.34.00.png?alt=media&#x26;token=b84337fc-9eef-4e88-a9cb-101bdc69f1ba" alt=""><figcaption></figcaption></figure>

### EBS vs EFS

<figure><img src="https://1722711354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwNXdoUkfmcozr29fRrfb%2Fuploads%2FoXfbZoxxm27svBeNB6mg%2FScreenshot%202023-12-01%20at%2000.35.24.png?alt=media&#x26;token=a37a4914-720c-4a31-ae04-02bd309576c1" alt=""><figcaption></figcaption></figure>

### EFS Infrequent Access (EFS-IA)

• Storage class that is cost-optimized for files not accessed every day&#x20;

• Up to 92% lower cost compared to EFS Standard&#x20;

• EFS will automatically move your files to EFS-IA based on the last time they were accessed&#x20;

• Enable EFS-IA with a Lifecycle Policy&#x20;

• Example: move files that are not accessed for 60 days to EFS-IA&#x20;

• Transparent to the applications accessing EFS

<figure><img src="https://1722711354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwNXdoUkfmcozr29fRrfb%2Fuploads%2FXs85age5GDslSQSypU7V%2FScreenshot%202023-12-01%20at%2000.37.10.png?alt=media&#x26;token=5acc54cc-ac3a-42cf-b7f9-58626d72ef2e" alt=""><figcaption></figcaption></figure>
