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Google Persistent Disk

Persistent Disk is durable, high-performance block storage for Google Cloud.

Key Features

  • Durability: Data is redundantly stored to ensure data integrity.
  • Performance: Standard, Balanced, SSD, and Extreme options.
  • Flexibility: Resize disks while they are attached and running.

Use Cases

  • VM Storage: Boot disks and data disks for Compute Engine and GKE.
  • Databases: High-performance storage for databases.

Key Concepts

  • Zonal vs. Regional: Regional disks replicate data between two zones in the same region for HA.
  • Snapshots: Incremental backups of your data.
  • Local SSD: Ephemeral storage physically attached to the server (not Persistent Disk, but related).