# hydro-project/fluent

A data-driven compute platform

Repository: https://github.com/hydro-project/fluent
Canonical: https://ross.abutalabs.com/products/fluent
Language: C++
License: Apache-2.0
License Family: permissive
Archived: true
Last push: 2019-08-09T20:54:21+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2962, "days_push": 2581, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1212, forks 169 (observed 2026-08-28T04:04:00.245571+00:00)

## What it is
Fluent was a data-driven compute platform from UC Berkeley's RISE Lab, combining an elastic cloud-native key-value store (based on Anna) with a data-centric programming framework for executing code against that store. The project has been renamed to Hydro, split into multiple repositories, and this repository is archived.

## Use cases
- run low-latency elastic key-value storage in the cloud
- execute arbitrary code or containers against data stored in Anna KVS
- build data-centric distributed applications with coordination-avoiding storage
- prototype serverless data processing with performance SLOs

## When to choose
- you want to study the research lineage of the Anna KVS and Hydro project
- you need a historical reference implementation of coordination-avoiding cloud storage

## When to avoid
- you want an actively maintained compute platform - use the successor Hydro repositories instead
- you need production support or recent bug fixes - this repo is archived and will be deleted
- you want a general-purpose key-value store with a mature ecosystem

## Facets
- artifact type: framework
- maturity: abandoned
- function: caching, database, streaming, concurrency
- domain: microservices, cloud-computing, databases
- platform: cpp, cloud
- tags: key-value-store, serverless-compute, archived, rise-lab, anna-kvs, dataflow, data-engineering, linux

## Member repositories
- hydro-project/fluent (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:00.245571+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 2026-08-30T06:17:59.883449+00:00, confidence not recorded.
  - readme: https://github.com/hydro-project/fluent (fetched 2026-08-28T04:04:00.245571+00:00, sha 4c9a6f08d41c)
- Data as of 2026-08-30T08:39:29.467469+00:00.