# zhihu/rucene

Rust port of Lucene

Repository: https://github.com/zhihu/rucene
Canonical: https://ross.abutalabs.com/products/rucene
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: lucene, rust, information-retrival
Last push: 2024-02-16T19:20:16+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2653, "days_push": 929, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1017, forks 63 (observed 2026-08-28T04:03:14.595767+00:00)

## What it is
Rucene is a Rust port of Apache Lucene, providing a library and API for adding full text search capabilities to applications. Its index searcher and writer components have been in production serving Zhihu's search traffic since 2018-2019.

## Use cases
- add full text search to a Rust application
- build an inverted index in Rust
- port an existing Lucene-based search stack to Rust
- run real-time search indexing and querying
- embed a search engine library without running a separate search server

## When to choose
- you want Lucene-like full text search semantics in Rust
- you need a proven in-production search library rather than an experimental one
- you are already familiar with Lucene 6.x APIs

## When to avoid
- you need up-to-date Lucene features or active community support
- you want a turnkey search server like Elasticsearch or Solr
- you need comprehensive API documentation, which is still lacking

## Facets
- artifact type: library
- maturity: maintenance
- function: search-engine, parser
- domain: developer-tools
- platform: rust, cross-platform
- tags: full-text-search, lucene-port, indexing, inverted-index, search, information-retrieval

## Member repositories
- zhihu/rucene (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:14.595767+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 2026-08-30T07:11:16.206097+00:00, confidence not recorded.
  - readme: https://github.com/zhihu/rucene (fetched 2026-08-28T04:03:14.595767+00:00, sha af7e805dac03)
  - registry_crates: https://crates.io/api/v1/crates/rucene (fetched 2026-08-29T13:10:07.113642+00:00, sha 2afed1a53d08)
- Data as of 2026-08-30T08:39:29.467469+00:00.