When can I use a data disk and when can I use a temporary disk?

Question

AHAMEDSATHICK MOHAMEDALI · Accepted Answer

1. Data Disk (Persistent Storage) Definition: A disk that retains data even after the instance is stopped or terminated. AWS Equivalent: EBS volumes. Use Cases: Storing databases (MySQL, PostgreSQL) Persistent application data User files, logs that must survive instance restarts Key Feature: Data is durable and backed up via snapshots. 2. Temporary Disk (Ephemeral Storage) Definition: A disk that loses all data when the instance is stopped, terminated, or fails. AWS Equivalent: Instance Store volumes. Use Cases: Cache files Temporary data processing (e.g., intermediate computation, scratch space) High-speed storage for workloads that can tolerate data loss Key Feature: High I/O performance, but non-persistent.Summary 1. Data disk (EBS) → persistent, reliable, slightly slower 2. Temporary disk (Instance Store) → fast, ephemeral, data lost on stop/terminate

When can I use a data disk and when can I use a temporary disk?

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