Cassandra Project Health

Cassandra

Automated, reproducible metrics for the Apache Cassandra project.

asf_roster: ok git: ok github: ok github_commit_authors: ok github_issues: not_applicable github_profile: ok jira: ok ponymail: ok release: ok release_lines: ok security: ok subproject_releases: not_applicable

Peer context

The same five metrics, computed with the same code, for Apache Cassandra and five comparable Apache Software Foundation projects: Apache Kafka, Apache Spark, Apache Flink, Apache Pulsar, and Apache DataFusion. Cassandra's own line is drawn thicker in every chart below. See the METRICS.md definitions for exactly how each metric is computed.

Time to First Response (GitHub PRs) CHAOSS: Time to First Response
  • Apache Cassandra 1.05 Sep 2026 · n=71
  • Apache Kafka 0.58 Sep 2026 · n=258
  • Apache Spark 0.35 Sep 2026 · n=602
  • Apache Flink 0.35 Sep 2026 · n=216
  • Apache Pulsar 0.16 Sep 2026 · n=276
  • Apache DataFusion 0.85 Sep 2026 · n=565
Change Request Closure Ratio CHAOSS: Change Request Closure Ratio
  • Apache Cassandra 0.53 Sep 2026 · n=144
  • Apache Kafka 0.83 Sep 2026 · n=328
  • Apache Spark 0.87 Sep 2026 · n=719
  • Apache Flink 0.99 Sep 2026 · n=281
  • Apache Pulsar 0.93 Sep 2026 · n=290
  • Apache DataFusion 0.84 Sep 2026 · n=690
Contributor Absence Factor CHAOSS: Contributor Absence Factor
  • Apache Cassandra 7.0 Sep 2026 · n=97
  • Apache Kafka 19.0 Sep 2026 · n=269
  • Apache Spark 12.0 Sep 2026 · n=445
  • Apache Flink 10.0 Sep 2026 · n=183
  • Apache Pulsar 2.0 Sep 2026 · n=101
  • Apache DataFusion 21.0 Sep 2026 · n=478
Release Frequency (trailing 24 months) CHAOSS: Release Frequency
  • Apache Cassandra 24.0 Sep 2026 · n=24
  • Apache Kafka 16.0 Sep 2026 · n=16
  • Apache Spark 17.0 Sep 2026 · n=17
  • Apache Flink 17.0 Sep 2026 · n=17
  • Apache Pulsar 42.0 Sep 2026 · n=42
  • Apache DataFusion 30.0 Sep 2026 · n=30
Open PR backlog (total) CHAOSS: Change Requests (adapted)
  • Apache Cassandra 549.0 Sep 2026 · n=549
  • Apache Kafka 584.0 Sep 2026 · n=584
  • Apache Spark 567.0 Sep 2026 · n=567
  • Apache Flink 367.0 Sep 2026 · n=367
  • Apache Pulsar 506.0 Sep 2026 · n=506
  • Apache DataFusion 447.0 Sep 2026 · n=447

Current month, all six projects

Project As of Time to First Response (GitHub PRs) Change Request Closure Ratio Contributor Absence Factor Release Frequency (trailing 24 months) Open PR backlog (total)
Apache Cassandra 2026-09-30 1.05 0.53 7.0 24.0 549
Apache Kafka 2026-09-30 0.58 0.83 19.0 16.0 584
Apache Spark 2026-09-30 0.35 0.87 12.0 17.0 567
Apache Flink 2026-09-30 0.35 0.99 10.0 17.0 367
Apache Pulsar 2026-09-30 0.16 0.93 2.0 42.0 506
Apache DataFusion 2026-09-30 0.85 0.84 21.0 30.0 447