Ok, I see. I did some reading and it looks like this to me: * the DB is supported by a backing file * this backing file supports multiple read threads simulta

Ok, I see. I did some reading and it looks like this to me: * the DB is supported by a backing file * this backing file supports multiple read threads simultaneously but writes are locked via filesystem locks * write performance with multiple writers is therefore dangerous * read performance is good if no one is writing and consistent even if someone is