RE: BSC / MSC volatile state / restart handling

Hi Harald,

We explicitly don't want to use some kind of database system, as the VLR data needs to be accessed all over the code directly/synchronously/non-blockingly. We cannot wait for it to be retrieved from somewhere. That's what is done with HLR data.

Lightning Memory-Mapped Database (https://en.wikipedia.org/wiki/Lightning_Memory-Mapped_Database) is designed for exactly these requirements.

It gives non-blocking access to the data - directly in-memory. Yet it also persists the data to disk in the background. So in case the software is restarted, it can pick off exactly where it left its dataset.

LMDB is highly recommended.

BR, Michael A