# apache/solr

Apache Solr open-source search software

Repository: https://github.com/apache/solr
Canonical: https://ross.abutalabs.com/products/solr
Homepage: https://solr.apache.org/
Language: Java
License: Apache-2.0
License Family: permissive
Topics: lucene, solr, search, nosql, java, backend, search-engine, information-retrieval
Last push: 2026-08-26T18:42:24+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 2018, "days_push": 7, "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 1667, forks 859 (observed 2026-08-28T04:05:19.637747+00:00)

## What it is
Apache Solr is a fast, open-source, multi-modal search platform built on Apache Lucene, providing full-text, vector, and geospatial search over HTTP with a REST-like API. It is highly scalable and fault tolerant, offering distributed indexing, replication, load-balanced querying, and automated failover via SolrCloud and ZooKeeper.

## Use cases
- add full-text search to a website or application
- index and query millions of documents with faceting and highlighting
- run vector search for semantic or AI-powered retrieval
- perform geospatial search over location data
- deploy a scalable, fault-tolerant search cluster on Kubernetes
- build schemaless search indexes that evolve with your data
- power e-commerce product search and navigation

## When to choose
- you need a battle-tested, production-grade enterprise search server with REST APIs
- you require distributed indexing, replication, and automated failover at large scale
- you want combined full-text, vector, and geospatial search in one platform
- you need faceting, hit highlighting, joins, grouping, and advanced tokenization
- you want Docker/Kubernetes deployment with an official Solr Operator

## When to avoid
- you only need simple embedded search inside a single application (consider Lucene directly)
- you want a lightweight document store without search-centric features
- your team cannot operate a JVM-based server or manage ZooKeeper-based clustering
- you need a fully managed hosted search service rather than self-hosted infrastructure

## Facets
- artifact type: service
- maturity: stable
- function: search-engine, database, analytics, http-server, plugin-system
- domain: databases, big-data, analytics, backend
- platform: jvm, self-hosted, windows
- tags: full-text-search, vector-search, geospatial-search, lucene, faceting, distributed-indexing, solrcloud, nosql, information-retrieval, rest-api, search, docker, kubernetes, web-server, linux, macos

## Member repositories
- apache/solr (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:19.637747+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 2026-08-30T03:42:52.313728+00:00, confidence not recorded.
  - readme: https://github.com/apache/solr (fetched 2026-08-28T04:05:19.637747+00:00, sha 987f6ce53a9d)
  - homepage: https://solr.apache.org/ (fetched 2026-08-29T11:16:12.781384+00:00, sha c91f182c0bb5)
  - site_page: https://solr.apache.org/guide/solr/latest (fetched 2026-08-29T11:16:12.792688+00:00, sha f2eafb16ea04)
  - site_page: https://solr.apache.org/features.html (fetched 2026-08-29T11:16:12.794350+00:00, sha 49ba888bbf28)
  - site_page: https://solr.apache.org/community.html (fetched 2026-08-29T11:16:12.796573+00:00, sha 943b39cbca1d)
  - site_page: https://solr.apache.org/resources.html (fetched 2026-08-29T11:16:12.798410+00:00, sha fba764de615d)
- Data as of 2026-08-30T08:39:29.467469+00:00.