In my college Data Structures and Algorithms course, we covered B-Trees, but I didn’t grok why I’d choose to use one. As presented, B-Trees were essentially “better” Binary Search Trees, with some hand-waving done that they had improved performance when used in database applications. I remember needing to memorize a bunch of equations to determine the carrying capacity of a M-degree B-Tree, and a vague understanding of B-Tree lookup/insertion/deletion, but not much else. Which is a shame! They’re interesting structures.

source: HN