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- Add LZ4_COMPRESS to CompressAlg enum - Implement lz4_compress/lz4_decompress functions using LZ4 and LZ4_HC - Support compression levels 0 (fast) and 1-12 (HC high compression) - Add liblz4 detection in Makefile via pkg-config - Add liblz4-dev to Travis CI dependencies - Add runtime validation for LZ4 compression level - Update help strings to include 'lz4' option - Add compression tests for LZ4 (stream, archive, levels)
Add new tests for LZ4 compression feature: - test_merge_lz4_backups: MERGE with LZ4 compressed backups chain - test_validate_lz4_backup: VALIDATE for LZ4 compressed backups - test_mixed_compression_chain_zlib_lz4: mixed compression chain restore - test_merge_mixed_compression_zlib_lz4: MERGE with mixed algorithms - test_lz4_incompressible_data: random/incompressible data handling - test_lz4_empty_and_sparse_tables: edge cases with empty/sparse tables Also fix linter warnings: - Remove unused imports (idx_ptrack, datetime, timedelta, subprocess) - Remove unused variables in test_lz4_compression_levels - Apply ruff formatting to entire file
Replace gen_random_bytes() from pgcrypto with md5(random()) concatenation to generate pseudo-random data. This avoids dependency on pgcrypto extension which may not be available in CI environment.
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Summary
Changes
src/data.csrc/pg_probackup.hBuild requirements
liblz4-devpackage required for LZ4 supportUsage