[Bug] Dropped data when persisting large files

[fsteff]

Describe the bug

When persisting large values (>20MB on my machine) these are often dropped.
In our case we are saving and later loading large numpy arrays as .npz files via zenoh.
These files are frequently not persisted. The logs of the router don't show anything out of the ordinary.

To reproduce

1. Start up a zenoh router with zenoh-backend-filesystem plugin
2. Publish a large binary (>20MB) via zenoh, on a path that is persisted via the plugin

The file will not be written to the filesystem and won't be available via zenoh query.

System info

• Platform: Win11
• Python 3.10.9 and 3.11.3
• Zenoh v1.1.0 (will check v1.1.1 later)

[fsteff]

Okay sorry, I guess that's actually expected behavior (quality of service).
We switched the PUT to CongestionControl.BLOCK and now it works.