Interactive LabClient-side Simulation

B+ Tree Database Index

Interactive B+ Tree with node splits, key promotion, and leaf linked-list range scans.

Order M:

B+ Tree Index ready (Order M=3).

Range Scan [A, B]:to

Root (Internal Node)

Subtree < 50

Subtree ≥ 50

Leaf Nodes (Physical Record Storage & Doubly Linked List)

→

Why Databases (MySQL InnoDB) Use B+ Trees:

1. High Fanout & Low Tree Depth: A typical 16KB InnoDB page with 4-level B+ Tree can index over 20,000,000 rows with only 3 to 4 disk I/O reads.

2. High Speed Range Scans: Unlike standard binary search trees that require costly recursive in-order tree traversals, B+ tree leaf nodes are linked directly in a doubly-linked list. Once the first matching leaf node is located via binary search from root, subsequent records are scanned linearly along the leaf chain with sequential disk I/O.

How to Use B+ Tree Database Index

Follow these simple steps to use the tool locally in your browser.

1. Configure Parameters: Select preset scenarios or set custom input values.

2. Interactive Exploration: Step through operations or play visual simulation animations.

3. Master Concepts: Inspect state changes, memory layouts, and algorithmic invariants.

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Frequently Asked Questions

Everything you need to know about this tool and data security.

Is my data safe when using this tool?

Yes, 100% safe. This tool operates entirely inside your web browser using client-side JavaScript and WebAssembly. Your data never touches any external server.