Ownership is measured by how many commits each author made to each file in the current tree. It highlights bus-factor risk (files only one person has ever touched) and where knowledge is concentrated. The bus factor is the smallest number of people who are, between them, primary owner of more than half of the files.
Files only one author has ever changed. The more a file has changed, the more knowledge is at risk if that person leaves.
| File | Sole owner | Commits |
|---|---|---|
| src/java/org/apache/cassandra/cql3/constraints/UnaryFunctionColumnConstraint.java | Stefan Miklosovic | 7 |
| conf/jvm17-clients.options | Ekaterina Dimitrova | 7 |
| test/unit/org/apache/cassandra/cql3/validation/miscellaneous/PreparedStatementTest.java | Jaydeepkumar Chovatia | 6 |
| .build/docker/_build-debian.sh | mck | 5 |
| src/java/org/apache/cassandra/cql3/constraints/AbstractFunctionConstraint.java | Stefan Miklosovic | 5 |
| src/java/org/apache/cassandra/cql3/constraints/NotNullConstraint.java | Stefan Miklosovic | 5 |
| src/java/org/apache/cassandra/config/AccordConfig.java | Benedict Elliott Smith | 5 |
| test/distributed/org/apache/cassandra/service/accord/journal/AccordJournalBurnTest.java | Benedict Elliott Smith | 5 |
| src/java/org/apache/cassandra/service/accord/RangeIndex.java | Benedict Elliott Smith | 5 |
| src/java/org/apache/cassandra/tcm/listeners/UpgradeMigrationListener.java | Sam Tunnicliffe | 5 |
| File | Sole owner | Commits |
|---|---|---|
| src/java/org/apache/cassandra/cql3/constraints/UnaryFunctionColumnConstraint.java | Stefan Miklosovic | 7 |
| conf/jvm17-clients.options | Ekaterina Dimitrova | 7 |
| test/unit/org/apache/cassandra/cql3/validation/miscellaneous/PreparedStatementTest.java | Jaydeepkumar Chovatia | 6 |
| .build/docker/_build-debian.sh | mck | 5 |
| src/java/org/apache/cassandra/cql3/constraints/AbstractFunctionConstraint.java | Stefan Miklosovic | 5 |
| src/java/org/apache/cassandra/cql3/constraints/NotNullConstraint.java | Stefan Miklosovic | 5 |
| src/java/org/apache/cassandra/config/AccordConfig.java | Benedict Elliott Smith | 5 |
| test/distributed/org/apache/cassandra/service/accord/journal/AccordJournalBurnTest.java | Benedict Elliott Smith | 5 |
| src/java/org/apache/cassandra/service/accord/RangeIndex.java | Benedict Elliott Smith | 5 |
| src/java/org/apache/cassandra/tcm/listeners/UpgradeMigrationListener.java | Sam Tunnicliffe | 5 |
| test/unit/org/apache/cassandra/index/sai/metrics/IndexGroupMetricsTest.java | Mike Adamson | 5 |
| src/java/org/apache/cassandra/service/accord/debug/DebugExecution.java | Benedict Elliott Smith | 4 |
| src/java/org/apache/cassandra/service/accord/InMemoryRangeIndex.java | Benedict Elliott Smith | 4 |
| src/java/org/apache/cassandra/service/accord/journal/JournalRangeIndex.java | Benedict Elliott Smith | 4 |
| test/unit/org/apache/cassandra/db/guardrails/GuardrailReadBeforeWriteListOperationsTest.java | Andrés de la Peña | 4 |
| test/unit/org/apache/cassandra/db/guardrails/GuardrailUserTimestampsTest.java | Andrés de la Peña | 4 |
| test/unit/org/apache/cassandra/index/sai/cql/intersection/RandomIntersectionTester.java | Caleb Rackliffe | 4 |
| src/java/org/apache/cassandra/gms/NewGossiper.java | Sam Tunnicliffe | 4 |
| src/java/org/apache/cassandra/tools/TransformClusterMetadataHelper.java | Sam Tunnicliffe | 4 |
| doc/modules/cassandra/pages/reference/cql-commands/create-custom-index.adoc | Lorina Poland | 4 |
| test/unit/org/apache/cassandra/index/sai/utils/AbstractPrimaryKeyTester.java | Mike Adamson | 4 |
| test/conf/datacenters.properties | Jonathan Ellis | 4 |
| test/resources/nodetool/help/invalidatepermissionscache | Maxim Muzafarov | 3 |
| test/unit/org/apache/cassandra/tools/nodetool/NodetoolHelpGenerator.java | Maxim Muzafarov | 3 |
| .build/ci/ci_parser.py | mck | 3 |
| .github/workflows/jenkins-check.yaml | mck | 3 |
| .build/docker/build-redhat.sh | mck | 3 |
| .build/docker/_docker_init_tests.sh | mck | 3 |
| test/unit/org/apache/cassandra/utils/CompressionDictionaryHelper.java | Stefan Miklosovic | 3 |
| src/java/org/apache/cassandra/cql3/constraints/UnaryConstraintFunction.java | Stefan Miklosovic | 3 |
| src/java/org/apache/cassandra/service/snapshot/TakeSnapshotTask.java | Stefan Miklosovic | 3 |
| src/java/org/apache/cassandra/cql3/constraints/AbstractFunctionSatisfiabilityChecker.java | Stefan Miklosovic | 3 |
| src/java/org/apache/cassandra/service/accord/execution/AccordCache.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/service/accord/execution/AccordCacheEntry.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/service/accord/execution/AccordExecutor.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/service/accord/execution/SafeTask.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/service/accord/topology/AccordTopologyService.java | Benedict Elliott Smith | 3 |
| test/distributed/org/apache/cassandra/fuzz/topology/AccordRebootstrapTest.java | Benedict Elliott Smith | 3 |
| test/simulator/test/org/apache/cassandra/service/accord/execution/AccordCommandStoreExecutorTest.java | Benedict Elliott Smith | 3 |
| test/simulator/test/org/apache/cassandra/simulator/test/AccordExecutorTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/AccordExpungeTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/AccordFailedKeyTestHarness.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/ControllableRangeIndex.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordExecutorCancelledConsequenceTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordExecutorContinuationCancellationTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordExecutorIncrDeadlockTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordExecutorIncrRequeueRevocationTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordExecutorKeyAdoptionTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordExecutorLoadFailureTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordExecutorPresetupLoadingTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordExecutorRangeScanTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordFailedKeyAbandonTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordFailedKeyBatchTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/service/accord/execution/AccordFailedKeyTest.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/service/accord/debug/DebugTxnGraph.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/utils/concurrent/SignalLock.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/utils/MonotonicClockTranslation.java | Benedict Elliott Smith | 3 |
| test/simulator/main/org/apache/cassandra/simulator/systems/InterceptorOfExecution.java | Benedict Elliott Smith | 3 |
| test/simulator/main/org/apache/cassandra/simulator/package-info.java | Benedict Elliott Smith | 3 |
| test/microbench/org/apache/cassandra/test/microbench/btree/Megamorphism.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/service/paxos/BallotGenerator.java | Benedict Elliott Smith | 3 |
| test/simulator/main/org/apache/cassandra/simulator/systems/SimulatedBallots.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/utils/concurrent/SemaphoreTest.java | Benedict Elliott Smith | 3 |
| test/unit/org/apache/cassandra/utils/concurrent/ImmediateFutureTest.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/concurrent/ScheduledExecutorPlus.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/net/FutureDelegate.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/utils/concurrent/AsyncPromise.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/utils/concurrent/SharedCloseableImpl.java | Benedict Elliott Smith | 3 |
| src/java/org/apache/cassandra/cql3/functions/FunctionFactory.java | Andrés de la Peña | 3 |
| test/distributed/org/apache/cassandra/distributed/test/guardrails/GuardrailPartitionSizeTest.java | Andrés de la Peña | 3 |
| test/unit/org/apache/cassandra/cql3/validation/entities/WritetimeOrTTLTest.java | Andrés de la Peña | 3 |
| test/unit/org/apache/cassandra/db/guardrails/GuardrailInSelectCartesianProductTest.java | Andrés de la Peña | 3 |
| test/distributed/org/apache/cassandra/distributed/test/sai/ReplicaFilteringWithStaticsTest.java | Caleb Rackliffe | 3 |
| test/unit/org/apache/cassandra/index/sai/cql/EmptyStringLifecycleTest.java | Caleb Rackliffe | 3 |
| src/java/org/apache/cassandra/tcm/listeners/PlacementsChangeListener.java | Sam Tunnicliffe | 3 |
| src/java/org/apache/cassandra/tcm/transformations/cms/FinishAddToCMS.java | Sam Tunnicliffe | 3 |
| src/java/org/apache/cassandra/tcm/transformations/cms/RemoveFromCMS.java | Sam Tunnicliffe | 3 |
| src/java/org/apache/cassandra/tcm/transformations/cms/StartAddToCMS.java | Sam Tunnicliffe | 3 |
| test/unit/org/apache/cassandra/tcm/membership/MembershipUtils.java | Sam Tunnicliffe | 3 |
| src/java/org/apache/cassandra/tcm/membership/Location.java | Sam Tunnicliffe | 3 |
| doc/modules/cassandra/pages/reference/vector-data-type.adoc | Lorina Poland | 3 |
| doc/modules/cassandra/pages/managing/operating/compaction/index.adoc | Lorina Poland | 3 |
| doc/modules/cassandra/pages/managing/operating/compaction/twcs.adoc | Lorina Poland | 3 |
| doc/modules/cassandra/pages/managing/configuration/index.adoc | Lorina Poland | 3 |
| doc/modules/cassandra/pages/developing/cql/json.adoc | Lorina Poland | 3 |
| doc/modules/cassandra/pages/getting-started/index.adoc | Lorina Poland | 3 |
| doc/modules/cassandra/partials/nodetool_and_cqlsh.adoc | Lorina Poland | 3 |
| doc/modules/cassandra/partials/nodetool_and_cqlsh_nobin.adoc | Lorina Poland | 3 |
| test/conf/cassandra-converters-special-cases-old-names.yaml | Ekaterina Dimitrova | 3 |
| test/conf/cassandra-converters-special-cases.yaml | Ekaterina Dimitrova | 3 |
| doc/modules/cassandra/examples/BNF/create_table_like.bnf | Maxwell Guo | 3 |
| test/simulator/main/org/apache/cassandra/simulator/cluster/OnInstanceStartConsensusMigration.java | Ariel Weisberg | 3 |
| examples/ssl-factory/src/org/apache/cassandra/security/KubernetesSecretsSslContextFactory.java | maulin-vasavada | 3 |
| src/java/org/apache/cassandra/db/tries/MergeTrie.java | Branimir Lambov | 3 |
| src/java/org/apache/cassandra/db/tries/Trie.md | Branimir Lambov | 3 |
| tools/bin/hash_password | Bereng | 3 |
| test/distributed/org/apache/cassandra/distributed/test/SinglePartitionReadCommandTest.java | Benjamin Lerer | 3 |
| test/unit/org/apache/cassandra/index/sai/disk/v1/bbtree/BlockBalancedTreeQueriesTest.java | Mike Adamson | 3 |
| test/unit/org/apache/cassandra/index/sai/disk/v1/bitpack/NumericValuesTest.java | Mike Adamson | 3 |
| test/unit/org/apache/cassandra/index/sai/cql/types/NumericTypeSortingTest.java | Mike Adamson | 3 |
Primary owner = the author with the most commits to a file. Solely owned = files only that author has touched.
| Author | Files owned | Solely owned | Files touched |
|---|---|---|---|
| Benedict Elliott Smith | 1,026 | 342 | 2,633 |
| Maxim Muzafarov | 858 | 284 | 3,382 |
| Roxana Neophytou | 632 | 632 | 635 |
| Lorina Poland | 598 | 519 | 689 |
| Sam Tunnicliffe | 512 | 126 | 1,368 |
| Stefan Miklosovic | 386 | 83 | 1,041 |
| Mike Adamson | 377 | 181 | 532 |
| Sylvain Lebresne | 326 | 13 | 902 |
| David Capwell | 309 | 106 | 1,146 |
| Jonathan Ellis | 215 | 5 | 556 |
| Alex Petrov | 172 | 120 | 1,011 |
| Jacek Lewandowski | 164 | 59 | 783 |
| Marcus Eriksson | 163 | 38 | 915 |
| Dmitry Konstantinov | 150 | 119 | 485 |
| mck | 140 | 36 | 373 |
| Robert Stupp | 126 | 36 | 623 |
| Andrés de la Peña | 120 | 55 | 642 |
| Branimir Lambov | 119 | 44 | 732 |
| Ariel Weisberg | 101 | 19 | 1,119 |
| Pavel Yaskevich | 101 | 33 | 333 |
| Caleb Rackliffe | 100 | 52 | 753 |
| Blake Eggleston | 95 | 25 | 1,036 |
| Bereng | 93 | 45 | 542 |
| Aleksey Yeshchenko | 80 | 12 | 966 |
| maulin-vasavada | 78 | 21 | 130 |
Files touched by the most people — shared code where changes are most likely to need coordination.
| File | Contributors | Primary owner | Owner share |
|---|---|---|---|
| CHANGES.txt | 478 | Jonathan Ellis | 18.9% |
| src/java/org/apache/cassandra/service/StorageService.java | 123 | Jonathan Ellis | 30.8% |
| build.xml | 111 | Sylvain Lebresne | 11.9% |
| src/java/org/apache/cassandra/config/DatabaseDescriptor.java | 111 | Jonathan Ellis | 29.2% |
| NEWS.txt | 111 | Jonathan Ellis | 18.6% |
| conf/cassandra.yaml | 108 | Jonathan Ellis | 26.9% |
| src/java/org/apache/cassandra/config/Config.java | 101 | Jonathan Ellis | 15.0% |
| src/java/org/apache/cassandra/tools/NodeProbe.java | 99 | Jonathan Ellis | 24.4% |
| src/java/org/apache/cassandra/db/ColumnFamilyStore.java | 82 | Jonathan Ellis | 48.1% |
| src/java/org/apache/cassandra/db/compaction/CompactionManager.java | 78 | Jonathan Ellis | 20.6% |
| src/java/org/apache/cassandra/service/StorageServiceMBean.java | 75 | Jonathan Ellis | 25.1% |
| src/java/org/apache/cassandra/service/StorageProxy.java | 74 | Jonathan Ellis | 40.5% |
| src/java/org/apache/cassandra/service/CassandraDaemon.java | 63 | Jonathan Ellis | 22.0% |
| src/java/org/apache/cassandra/tools/NodeTool.java | 62 | Brandon Williams | 14.5% |
| test/unit/org/apache/cassandra/cql3/CQLTester.java | 61 | Sylvain Lebresne | 10.2% |
| src/java/org/apache/cassandra/utils/FBUtilities.java | 56 | Jonathan Ellis | 40.2% |
| pylib/cqlshlib/cql3handling.py | 56 | Aleksey Yeshchenko | 16.7% |
| src/java/org/apache/cassandra/net/MessagingService.java | 54 | Jonathan Ellis | 42.1% |
| src/java/org/apache/cassandra/cql3/statements/SelectStatement.java | 50 | Sylvain Lebresne | 37.4% |
| src/java/org/apache/cassandra/cql3/QueryProcessor.java | 49 | Sylvain Lebresne | 26.3% |
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Publishes the report to GitHub Pages on every push to main: turn on Pages for the gh-pages branch.
# .github/workflows/gitstats.yml
name: GitStats Report
on:
push:
branches: [main]
permissions:
contents: write
jobs:
gitstats:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v7
with:
fetch-depth: 0
- uses: shenxianpeng/gitstats-action@v1
with:
deploy-to-pages: true