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feat: Migrate SST block infrastructure and file reader/writer - #44
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leaves12138
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Jun 4, 2026
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Reviewed PR #44. The migrated SST block infrastructure, block cache, block reader/writer, and SST file reader/writer are consistent with the existing Paimon C++ reference implementation, and I did not find blockers.
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Purpose
No Linked issue.
Migrate SST (Sorted String Table) block-level I/O infrastructure:
Block primitives (
src/paimon/common/sst/):BlockEntry— key-value entry within a data block (block_entry.h)BlockHandle— offset/size pointer to a block within an SST file (block_handle.h/cpp)BlockTrailer— block checksum and compression type footer (block_trailer.h/cpp)BlockAlignedType— alignment strategy enum for block I/O (block_aligned_type.h)BloomFilterHandle— handle pointing to the bloom filter block (bloom_filter_handle.h)Block read/write (
src/paimon/common/sst/):BlockWriter— appends entries and builds a serialized block (block_writer.h/cpp)BlockReader— reads and parses a serialized block (block_reader.h/cpp)BlockIterator— iterates over entries in a parsed block (block_iterator.h/cpp)BlockCache— LRU cache wrapper for parsed blocks (block_cache.h)SST file I/O (
src/paimon/common/sst/):SstFileUtils— shared constants and utility functions (sst_file_utils.h)SstFileWriter— writes blocks, index, bloom filter, and footer into an SST file (sst_file_writer.h/cpp)SstFileReader— opens and reads blocks from an SST file (sst_file_reader.h/cpp)Tests
block_cache_test.cpp— LRU eviction, capacity limits, concurrent accesssst_file_io_test.cpp— end-to-end SST write/read round-trip, block iterationAPI and Format
Documentation
Generative AI tooling
Migrate-by: Aone Copilot (Claude)