What is the process between local cache, cloud cache, MinIO bucket, and the iModel bim file?

[guanhuaming]

Hello. I have a local iTwin frontend and backend application. In the frontend application, I open a BIM file using SnapshotConnection.openFile. The tileCacheStorage property of IModelHostOptions in the backend's IModelHost is configured to use MinIO storage. I would like to understand the specific processing flow on the backend when I open a BIM file using SnapshotConnection.openFile on the frontend.
For example:

1. What is the process between local cache, cloud cache, MinIO bucket, and the iModel database?
2. Can I store BIM files directly in the MinIO bucket instead of on the local machine?
3. If it's possible to store BIM files directly in the MinIO bucket, how does IModelHost directly access the data in the MinIO bucket?

Can someone provide a flowchart of the entire process when requesting data? Thanks.