apache/paimon

0

/ 100

Documentation88
Engineering86
Health94
Java3,305Apache-2.01d ago
Grade a repo

A well-known project done right. Strong docs and solid engineering throughout.

Apache Paimon is a lake format that enables building a Realtime Lakehouse Architecture with Flink and Spark for both streaming and batch operations.

Documentation

88

Contributing guide5pt77

CONTRIBUTING guide found.

README12pt85

README is present.

Install and run instructions9pt90

README documents how to install the project.

License6pt100

Licensed under Apache-2.0.

Engineering

86

Tests18pt80

Test files detected (docs/docs/concepts/spec).

Reproducibility6pt80

Lockfile present (docs/yarn.lock). Installs are reproducible.

CI/CD14pt85

CI is configured (.github/workflows/check-licensing.yml).

Linting and formatting5pt100

Java/Kotlin linting configured (tools/maven/checkstyle.xml).

Issue and PR templates6pt100

Issue or PR templates present.

Project health

94

Housekeeping3pt60

.gitignore present.

Dependency manifest6pt100

Dependency manifest found (pom.xml).

Repository metadata5pt100

Repository has a description.

Activity5pt100

Actively maintained (pushed within the last month).

Repository health signals

Activity, community, and responsiveness at scan time

Activity

  • —
    Commits (30d / 90d)
  • 1,334
    Forks
  • 0
    Releases

Community

  • —
    Community health
  • —
    authors own >50% of commits
  • 3,305
    Watchers

Responsiveness

  • 1d 1h
    Median issue response
  • 22h
    Median PR merge time
  • 683
    Open issues
Repository files44 root entries
  • .github
    Good: CI is configured (.github/workflows/check-licensing.yml).
    Good: Issue or PR templates present.
  • .idea
    Issue: Build artifacts or local files may be committed (.idea/icon.png) (−40 pts).Fix: Remove them and add to .gitignore.
  • .mvn
  • docs
    Good: CONTRIBUTING guide found.
    Issue: CONTRIBUTING guide contents could not be read (−28 pts vs a readable file).Fix: Move the file to the repo root or docs/CONTRIBUTING.md so its setup, style, test, and PR sections can be graded.
    Good: Test files detected (docs/docs/concepts/spec).
    Good: Lockfile present (docs/yarn.lock). Installs are reproducible.
  • licenses
  • paimon-api
  • paimon-arrow
  • paimon-benchmark
  • paimon-bundle
  • paimon-codegen
  • paimon-codegen-loader
  • paimon-common
  • paimon-core
  • paimon-docs
  • paimon-e2e-tests
    Good: Environment pinned via paimon-e2e-tests/src/test/resources-filtered/docker-compose.yaml.
  • paimon-filesystems
  • paimon-flink
  • paimon-format
  • paimon-hive
  • paimon-iceberg
  • paimon-lance
  • paimon-lumina
  • paimon-mosaic
  • paimon-python
  • paimon-service
  • paimon-spark
  • paimon-tantivy
  • paimon-test-utils
  • paimon-vector
  • paimon-vfs
  • paimon-vortex
  • tools
    Good: Java/Kotlin linting configured (tools/maven/checkstyle.xml).
  • .asf.yaml
  • .gitignore
    Good: .gitignore present.
  • .gitmodules
  • .scalafmt.conf
  • AGENTS.md
  • CODE_OF_CONDUCT.md
    Good: Code of conduct present.
  • copyright.txt
  • LICENSE
    Good: Licensed under Apache-2.0.
  • NOTICE
  • pom.xml
    Good: Dependency manifest found (pom.xml).
  • README.md
    Good: README is present.
    Good: README is well structured with multiple sections.
    Good: README includes screenshots or visuals. Great for first impressions.
    Issue: README has no code examples (−15 pts).Fix: Show a quick-start snippet so contributors can see what using your project looks like.
    Good: README links to a live demo or deployed app.
    Good: README includes status badges.
    Good: README documents how to install the project.
    Good: README documents how to run the project.
  • SECURITY.md
    Good: Security policy present.