Yes, I understood that to mean mmap(). > is mmaping a file and using it directly from memory what databases should do today Some do; for example, SQLite: http

Yes, I understood that to mean mmap(). > is mmaping a file and using it directly from memory what databases should do today Some do; for example, SQLite: https://www.sqlite.org/mmap.html https://www.sqlite.org/mmap.html (the page has pros and cons, and explains how SQLite does memory mapped I/O).