# YDB

> YDB is an open-source, fault-tolerant distributed SQL database with strong consistency, ACID transactions, and horizontal scalability.

This file indexes the YDB documentation only. Other parts of ydb.tech are not covered yet.

## Documentation indexes

The automatically updated documentation indexes for the `main` branch are:

- [English documentation index for LLMs](https://ydb.tech/docs/en/llms.txt?version=main)
- [Russian documentation index for LLMs](https://ydb.tech/docs/ru/llms.txt?version=main)

## Versioned documentation

Documentation for a specific YDB product branch is available by replacing `{version}` with a branch such as `v26.1`:

- English: `https://ydb.tech/docs/en/llms.txt?version={version}`
- Russian: `https://ydb.tech/docs/ru/llms.txt?version={version}`

Available product releases and their changes:

- [YDB Server releases — English](https://ydb.tech/docs/en/changelog-server?version=main)
- [YDB Server releases — Russian](https://ydb.tech/docs/ru/changelog-server?version=main)

Example for YDB 26.1:

- [English documentation index for YDB 26.1](https://ydb.tech/docs/en/llms.txt?version=v26.1)
- [Russian documentation index for YDB 26.1](https://ydb.tech/docs/ru/llms.txt?version=v26.1)

If no specific product version is required, use the `main` documentation index.

## Documentation home

- [English documentation](https://ydb.tech/docs/en/?version=main)
- [Russian documentation](https://ydb.tech/docs/ru/?version=main)

## Optional

- [YDB on GitHub](https://github.com/ydb-platform/ydb): Source code
- [YDB Blog](https://ydb.tech/blog): Articles and announcements