# Algorithms

<figure><img src="https://415484505-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LxtoAXZwwOc4XGto8vb%2Fuploads%2F9JLrslBhfGSKQm0EQKuQ%2Falgo_for_system-Design.jpeg?alt=media&#x26;token=9a53b7d7-213c-4389-949f-acc32def9944" alt=""><figcaption></figcaption></figure>

### Distributed Hash Tables

A Distributed Hash Table (DHT) is a distributed system that provides a decentralized key-value store. It is used in peer-to-peer (P2P) networks to store and retrieve information in a scalable and fault-tolerant manner.

In a DHT, each participating node stores a subset of the key-value pairs, and a mapping function is used to assign keys to nodes. This allows nodes to locate the value associated with a given key by querying only a small subset of nodes, typically those responsible for keys close to the given key in the mapping space.

DHTs provide several desirable properties, such as self-organization, fault-tolerance, load-balancing, and efficient routing. They are commonly used in P2P file sharing systems, content distribution networks, and distributed databases.

\
![](https://415484505-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LxtoAXZwwOc4XGto8vb%2Fuploads%2FsX759YZShJQHQe2r1LcB%2Fimage.png?alt=media\&token=6d347b28-0703-4598-9a3c-f2f39224f3b6)

