Separate server compute from persistent data
If a workload stores meaningful data, it should rarely depend only on the instance root disk. Attached disks keep storage growth and recovery planning more deliberate.When to use attached disks
- Application data should live outside the OS disk
- A database or queue needs persistent storage
- Storage growth is likely to outpace CPU or memory growth
- You want cleaner recovery and migration patterns
Disk workflow
1
Create the disk in the same region
Keep the disk close to the instance it will serve.
2
Attach and format it correctly
Mount the disk using the filesystem your application expects.
3
Persist the mount configuration
Ensure the application still sees the disk after reboot or recovery.
4
Resize before you are out of space
Grow storage intentionally and verify the filesystem expansion completes.