SAP-C02 Q588 · Storage

Question

A company is deploying a new big data analytics cluster across multiple Availability Zones. All nodes must have read/write access to shared file storage that is highly available, POSIX-compatible, and high throughput. What should the architect do?

Accepted Answer

**Answer D: Amazon EFS with Max I/O performance mode** satisfies every requirement:

1. **Shared file storage**: Amazon EFS is a fully managed, shared file system that can be mounted by thousands of EC2 instances simultaneously. Every node in the cluster gets read/write access to the same data.

2. **Highly available across multiple AZs**: EFS stores data redundantly across multiple Availability Zones by default (Standard storage class). This perfectly matches the multi-AZ cluster requirement.

3. **POSIX-compatible**: EFS provides a standard POSIX file system interface with full POSIX permissions, file locking semantics, and hierarchical directory structure. Applications that expect a traditional Linux file system work seamlessly.

4. **High throughput**: The **Max I/O** performance mode

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