# hydro-project/hydro

A Rust framework for correct and performant distributed systems

Repository: https://github.com/hydro-project/hydro
Canonical: https://ross.abutalabs.com/products/hydro-project-hydro
Homepage: https://hydro.run/
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: distributed-systems, rust
Last push: 2026-09-03T01:36:54+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 100, release rhythm 81, longevity 100
- inputs: {"age_days": 1835, "days_push": 0, "days_rel": 50, "gap_med": 0, "n_releases_24m": 166}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1292, forks 88 (observed 2026-09-03T02:15:12.795666+00:00)

## What it is
Hydro is a Rust framework for building correct and performant distributed systems using location-oriented programming, where a single program can express logic spanning multiple machines. It compiles through the DFIR (Dataflow Intermediate Representation) runtime and integrates with Hydro Deploy for launching programs locally or in the cloud.

## Use cases
- build scalable distributed services in Rust that are correct by construction
- implement distributed protocols like Paxos or two-phase commit
- test distributed systems with a deterministic simulator
- deploy multi-node distributed applications to the cloud
- write low-latency stream processing dataflow programs
- reason about network reordering, duplication, and partial failure at compile time

## When to choose
- you are building distributed systems in Rust and want distribution handled as a first-class concern
- you need correctness guarantees for network behavior like reordering and partial failure
- you want low-latency, high-throughput dataflow execution
- you want to test and deploy a distributed system as a single program

## When to avoid
- you need a mature production framework with extensive ecosystem support
- your team is not comfortable with Rust
- you are building a simple single-machine application
- you need extensive documentation and community support right now

## Facets
- artifact type: framework
- maturity: active
- function: web-framework, rpc, streaming, compiler, testing, deployment, concurrency
- domain: microservices, developer-tools, apis, performance, cloud-computing
- platform: rust, cross-platform, cloud
- tags: distributed-systems, dataflow, location-oriented-programming, dfir, stream-processing, correctness, deterministic-simulation, rust-framework, docker

## Member repositories
- hydro-project/hydro (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:12.795666+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:55:44.698208+00:00, confidence not recorded.
  - readme: https://github.com/hydro-project/hydro (fetched 2026-09-03T02:15:12.795666+00:00, sha edf7219fd24d)
  - homepage: https://hydro.run/ (fetched 2026-08-29T12:11:43.024620+00:00, sha c2207bfa33b7)
  - site_page: https://hydro.run/docs/hydro/learn/quickstart (fetched 2026-08-29T12:11:43.027342+00:00, sha a31e5339dd53)
  - site_page: https://hydro.run/docs/hydro/reference (fetched 2026-08-29T12:11:43.029651+00:00, sha 2682f3294e71)
  - site_page: https://hydro.run/docs/dfir (fetched 2026-08-29T12:11:43.031494+00:00, sha 9798d86aa894)
- Data as of 2026-08-30T08:39:29.467469+00:00.