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Issues somebody may already be working on are listed last. List everything by date

• Wrap Options create_missing_column_families

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  good first issue

  Difficulty 2/5 1-3 hours Newbie friendliness 72/100

  dfa1/rocksdb-ffm#292 · Opened Nov 13, 2026

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• Wrap blob direct-write options (enable_blob_direct_write, blob_direct_write_partitions, blob_file_writable_file_max_buffer_size)

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  good first issue

  Difficulty 3/5 1-2 days Newbie friendliness 72/100

  dfa1/rocksdb-ffm#287 · Opened Nov 13, 2026

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• Extract duplicated string literals into constants in main code (java:S1192)

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  Difficulty 2/5 1-3 hours Newbie friendliness 70/100

  dfa1/vortex-java#738 · Opened Nov 12, 2026

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• Remove commented-out code flagged by Sonar (java:S125)

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  Difficulty 2/5 1-3 hours Newbie friendliness 70/100

  dfa1/vortex-java#737 · Opened Nov 12, 2026

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• Simplify AssertJ assertions flagged by Sonar (java:S5838)

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  good first issue

  Difficulty 2/5 1-3 hours Newbie friendliness 78/100

  dfa1/vortex-java#736 · Opened Nov 12, 2026

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• explore ADBC driver for vortex

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  help wanted project

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  dfa1/vortex-java#729 · Opened Nov 11, 2026

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• Importers return the WriteSummary of the file they write

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  Difficulty 3/5 1-2 days Newbie friendliness 72/100

  dfa1/vortex-java#728 · Opened Nov 10, 2026

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• Nested columns are not repartitioned: one chunk per batch instead of Rust's ~1 MB chunks

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 55/100

  dfa1/vortex-java#723 · Opened Nov 10, 2026

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• A string column whose first 8192 rows are constant gets a dict layout Rust does not write

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  bug

  Difficulty 3/5 1-2 days Newbie friendliness 74/100

  dfa1/vortex-java#722 · Opened Nov 10, 2026

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• Parquet export fails on struct and list columns

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  dfa1/vortex-java#721 · Opened Nov 9, 2026

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• getColumnFamilyMetadata(): per-level / per-SST structure of a column family

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  enhancement help wanted

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  dfa1/rocksdb-ffm#270 · Opened Nov 9, 2026

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• TableProperties view from flush / compaction / ingestion event payloads

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  enhancement help wanted

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  dfa1/rocksdb-ffm#269 · Opened Nov 9, 2026

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• Host the Javadoc on GitHub Pages and set it as the repo homepage

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  documentation enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 58/100

  dfa1/rocksdb-ffm#254 · Opened Nov 8, 2026

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• GetPropertiesOfAllTables / InRange / ByLevel

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  enhancement type-b

  Difficulty 4/5 3-5 days Newbie friendliness 46/100

  dfa1/rocksdb-ffm#251 · Opened Nov 8, 2026

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• ClipColumnFamily (experimental)

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  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  dfa1/rocksdb-ffm#250 · Opened Nov 8, 2026

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• Atomic multi-CF IngestExternalFiles

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  enhancement type-b

  Difficulty 4/5 3-5 days Newbie friendliness 43/100

  dfa1/rocksdb-ffm#249 · Opened Nov 8, 2026

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• LockWAL / UnlockWAL

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  enhancement type-b

  Difficulty 3/5 1-2 days Newbie friendliness 54/100

  dfa1/rocksdb-ffm#248 · Opened Nov 8, 2026

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• User-defined compression (CompressionManager, experimental)

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  enhancement type-b

  Difficulty 5/5 Over a week Newbie friendliness 28/100

  dfa1/rocksdb-ffm#247 · Opened Nov 8, 2026

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• User-defined MemTableRepFactory

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  enhancement type-b

  Difficulty 5/5 Over a week Newbie friendliness 15/100

  dfa1/rocksdb-ffm#246 · Opened Nov 8, 2026

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• User-defined FlushBlockPolicyFactory

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  enhancement type-b

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  dfa1/rocksdb-ffm#245 · Opened Nov 8, 2026

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• MultiScan (experimental)

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  enhancement type-b

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  dfa1/rocksdb-ffm#244 · Opened Nov 8, 2026

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• GetMergeOperands

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  enhancement type-b

  Difficulty 4/5 1-2 days Newbie friendliness 49/100

  dfa1/rocksdb-ffm#243 · Opened Nov 8, 2026

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• Cross-column-family iterators (coalescing / attribute-group)

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  enhancement type-b

  Difficulty 4/5 3-5 days Newbie friendliness 43/100

  dfa1/rocksdb-ffm#242 · Opened Nov 8, 2026

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• Zone table of a column whose few bounds Rust's trained FSST table compresses

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 42/100

  dfa1/vortex-java#709 · Opened Nov 8, 2026

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• Cross-check the child stats of string columns against vortex-jni

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  enhancement good first issue

  Difficulty 3/5 1-2 days Newbie friendliness 58/100

  dfa1/vortex-java#708 · Opened Nov 8, 2026

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• OpenTelemetry module: metrics (and explore JFR bridging)

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 35/100

  dfa1/rocksdb-ffm#240 · Opened Nov 8, 2026

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• Micrometer module: publish RocksDB statistics and properties

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 35/100

  dfa1/rocksdb-ffm#239 · Opened Nov 8, 2026

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• proposal to explore integration of new C functions

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  enhancement type-b

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  dfa1/rocksdb-ffm#238 · Opened Nov 8, 2026

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• Custom UserDefinedIndexFactory (callback-based factory, builder, reader)

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  enhancement type-b

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  dfa1/rocksdb-ffm#237 · Opened Nov 8, 2026

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• SecondaryCache and TieredCache

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 52/100

  dfa1/rocksdb-ffm#236 · Opened Nov 8, 2026

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• Wide Columns: put_entity / get_entity (and iterator columns)

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  enhancement type-b

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  dfa1/rocksdb-ffm#235 · Opened Nov 8, 2026

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• More EventListener callbacks: file I/O first, then I/O errors and recovery

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  enhancement type-b

  Difficulty 4/5 3-5 days Newbie friendliness 38/100

  dfa1/rocksdb-ffm#234 · Opened Nov 8, 2026

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• Capped-prefix SliceTransform (rocksdb_slicetransform_create_capped_prefix)

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  enhancement type-b

  Difficulty 3/5 1-2 days Newbie friendliness 45/100

  dfa1/rocksdb-ffm#233 · Opened Nov 8, 2026

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• Library version query (rocksdb_ffm_version)

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  enhancement type-b

  Difficulty 3/5 1-2 days Newbie friendliness 52/100

  dfa1/rocksdb-ffm#232 · Opened Nov 8, 2026

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• Own C++ file for new C functions (patches-rocksdb-ffm.cc, ADR, optional symbols)

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  Difficulty 5/5 Over a week Newbie friendliness 35/100

  dfa1/rocksdb-ffm#231 · Opened Nov 8, 2026

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• Canonical Decimal encoding

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  Difficulty 4/5 3-5 days Newbie friendliness 42/100

  dfa1/vortex-java#662 · 1 comment · Opened Nov 5, 2026

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• feat(writer): write vortex.union (declared in Rust's unstable2026.10.0 edition)

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 38/100

  dfa1/vortex-java#660 · Opened Nov 4, 2026

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• Benchmark JDK 28 confined pools against our Arena.ofConfined() hot paths

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  Difficulty 4/5 3-5 days Newbie friendliness 55/100

  dfa1/rocksdb-ffm#195 · Opened Oct 24, 2026

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• feat(jdbc): JdbcExporter, matching the CSV and Parquet exporters

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  enhancement good first issue

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  dfa1/vortex-java#567 · Opened Oct 18, 2026

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• Editions: gate extension dtypes and support crate-declared families (json)

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  dfa1/vortex-java#548 · Opened Oct 17, 2026

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• OnPair trainer should draw Rust's sample (StdRng + partial_shuffle) for byte-identical dictionaries

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  enhancement PARKED

  Difficulty 4/5 3-5 days Newbie friendliness 22/100

  dfa1/vortex-java#534 · Opened Oct 13, 2026

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• Reader: concurrent scan with a confined arena per worker thread

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  enhancement perf

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  dfa1/vortex-java#505 · 1 comment · Opened Oct 9, 2026

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• Domain primitives (unsigned integers via Valhalla)

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  dfa1/vortex-java#496 · Opened Oct 9, 2026

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• VortexException message sanitization

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  security

  Difficulty 5/5 Over a week Newbie friendliness 18/100

  dfa1/vortex-java#495 · Opened Oct 9, 2026

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• vortex-arrow bridge module

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 18/100

  dfa1/vortex-java#494 · Opened Oct 9, 2026

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• Implement ResourceLimits + ReadOptions

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  security

  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  dfa1/vortex-java#492 · Opened Oct 9, 2026

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• Benchmark publishing: reproducible, peer-reviewed, multi-machine

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  perf

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  dfa1/vortex-java#489 · Opened Oct 9, 2026

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• Create a project website

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  help wanted project

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  dfa1/vortex-java#488 · 3 comments · Opened Oct 9, 2026

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• Move project to a dedicated GitHub organization

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  Difficulty 3/5 Half a day Newbie friendliness 10/100

  dfa1/vortex-java#487 · Opened Oct 9, 2026

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• perf(writer, core): optional Vector API candidates on the write path and in shared helpers

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  Difficulty 4/5 3-5 days Newbie friendliness 22/100

  dfa1/vortex-java#484 · 2 comments · Opened Oct 9, 2026

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