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Why b/b+ tree used for DB index rather than AVL tree?
asked in Databases by (165 points) 5 | 23 views
B/B+ has larger fan out. IMO

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AVL Tree is balanced Binary Search Tree, in BST each node contains only one key so it will be a huge BST if we use it for indexing.
While in B/B++ tree a node contains many keys, the tree will have less height. Each node has the equal size to a Block size. In case of BST, I/O cost will be more because we have to fetch lots of data blocks.
answered by Veteran (15.8k points) 6 20 58
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