Prolly Trees are a variant of B-trees so let's first review some key B-tree concepts and then dive into how Prolly Trees work in light of those concepts. A B-tree is data structure that maps keys to values. A B-tree stores key-value pairs in leaf nodes in sorted order.

Implementation of peer-to-peer search trees (probabalistic b-trees trees) as used in dolt and noms. While this library has 100% test coverage and is relatively stable, it's not recommended for broad use.

2024年3月3日 · A Prolly Tree is a data structure closely related to a B-tree. Prolly Trees are generally useful but have proven particularly effective as the basis of the storage engine for version controlled databases. This article explains Prolly Trees in detail. Motivation. Let's say you need a data structure with the following properties:

Prolly Tree 是一种结合了 B 树和 Merkle 树特性的混合数据结构，它提供了高效的数据访问和可验证的数据完整性。 它专门设计用于处理分布式系统和大型数据库的需求，使索引能够在点对点（P2P）网络上进行同步和分发。

A Prolly Tree is a search tree where the number of values stored in each node is determined probabilistically, based on the data which is stored in the tree. A Prolly Tree is similar in many ways to a B-Tree, except that the number of values in each node has a probabilistic average rather than an enforced upper and lower bound, and the set of ...

2022年6月27日 · The core of Dolt's data model is a Merkle Tree index called a Prolly Tree. Prolly Trees draw on design concepts from databases, content-addressable storage, and version control systems. Combining these primitives creates a unique Merkle-based storage-engine that sets Dolt apart from other relational databases.

An awesome list for all things Prolly Trees. note: content-defined merkle trees: A node is the first child of its parent if u32 (node.hash [0..4]) < (2^32 / Q).

2024年11月16日 · Prolly trees are an advanced data structure designed for immutability and efficiency, making them perfect for versioned datasets. They excel in scenarios requiring robust version control,...

A Prolly Tree is a hybrid data structure that combines the features of B-trees and Merkle trees to provide both efficient data access and verifiable integrity. It is specifically designed to handle the requirements of distributed systems and large-scale databases, making indexes syncable and distributable over peer-to-peer (P2P) networks.

2020年6月16日 · In this blog post, we're going to look at how Dolt implements diff across two versions of a table by taking advantage of the structural sharing exhibited by Prolly-trees. Diffs between commits in a Dolt repository show the schema and data differences between all the tables in the database at the two commits.