huggingface/README · Persistent Storage Bug: Data in /data not surviving restarts on Spaces

Hello,

I’m running a custom Space on the L40S GPU with persistent storage enabled (20GB Small tier). My code correctly writes memory files into /data (confirmed by logs such as [SEMANTIC_SAVE] Saved memory entries: X and [SQLITE_WRITE] Logged convo for guest_user).

✅ During runtime, everything works perfectly:

My app reads/writes JSON + SQLite files from /data.

I can see [SEMANTIC_LOAD] Loaded memory entries: X after saving.

❌ But after a restart or GPU switch, I consistently get:

[SEMANTIC_LOAD] No memory file found, starting empty.
[BOOTSTRAP] Loaded 0 semantic facts for guest_user

This shows my files in /data are erased even though persistent storage should survive restarts (as described in the docs).

I have already:

Ensured all paths use /data/... (not /mnt/data).

Verified my app prints the correct file paths at startup.

Restarted the Space vs Pausing/Resuming — the result is the same: files disappear.

👉 Could this be a bug with persistent storage on Spaces? Or are there additional steps needed to ensure files survive GPU resets?

Any guidance would be appreciated — right now this makes persistent memory unusable for my AI app.

Thanks so much!