Summary:
PR https://github.com/facebook/rocksdb/issues/14266 ("Remove compression support") removed compression-related functionality from blob_dump_tool and ldb commands. While this was valid for the legacy stacked BlobDB (which no longer supports compression), the integrated blob storage (`enable_blob_files`) uses the same blob file format and fully supports compression via `blob_compression_type`.
This partial revert restores the ability to view uncompressed blob data from compressed blob files, which is essential for debugging and analysis of integrated blob storage.
Restored functionality:
- `blob_dump --show_uncompressed_blob` option
- `ldb dump --dump_uncompressed_blobs` option
- `ldb dump_live_files --dump_uncompressed_blobs` option
- Related ldb_test.py test coverage
The decompression implementation in utilities/blob_db/blob_dump_tool.cc has been updated to use the modern
`GetBuiltinV2CompressionManager()->GetDecompressorOptimizeFor()` API.
Suggested follow-up:
* Tests for blob_dump (or integrate it into sst_dump/ldb?)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/14382
Test Plan:
Restored ldb_test.py
Some manual testing
Reviewed By: mszeszko-meta
Differential Revision: D94257588
Pulled By: pdillinger
fbshipit-source-id: c6d8a556a51ec9422df208ae161806ccc1f20b36
1ba60ee9ee