MongoDB Internal Architecture | The Backend Engineering Show
The Backend Engineering Show with Hussein Nasser
00:00
Using a Range Scan in B Plus Three?
A range scan is really powerful in B plus three, especially if it's clustered. So you can find your document using a B plus three search in wire target using the record ID but guess what? What is this record ID? It doesn't mean anything to the user. This is an internal thing. But where did this disc lock happen? This used to be called the disc lock, but they changed it. That's what they had. They had this as this clock and their indexes, the ID, the actual user facing ID document index has been mapped always to the disc lock because that's what we had before.
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