Can you tell about how you write/read your data to/from disk? I‘m also exploring the incremental world using an approach like salsa+rocksdb. Similar like https://docs.rs/qbice/latest/qbice/. Would be great to learn about your approach.
Data is written at the end of indexing phase, during write we hold a lock, and the codebase is aware that offloaded data can be corrupted/outdated (mostly relevant for cache).
Query processing works on top of transaction, and the transaction holds data loaded from files for the duration of the query, and frees once the query is dropped.
There is a ton of tricky parts there, but I guess that's the gist of it.
If you're interested, here are the relevant parts of the source code: https://github.com/rust-glancer/rust-glancer/tree/main/crate... https://github.com/rust-glancer/rust-glancer/tree/main/crate... https://github.com/rust-glancer/rust-glancer/blob/main/crate... https://github.com/rust-glancer/rust-glancer/blob/main/crate...
Though I believe it's more of a direction for rust-analyzer rather Rust Glancer, at least for now.