f11/tools/sdk/blobfs-compression.md

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# blobfs-compression

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Usage: blobfs-compression [--option1=value --option2 ...]

The tool will output the maximum possible compressed file size using the exact same 
compression implementation in blobfs. The merkle tree used here is a non-compact merkle 
tree as it contributes to a bigger size than a compact merkle tree.

```

__Options:__

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--source_file=/path/to/file
    (required) the file to be compressed.
--compressed_file=/path/to/file
    (optional) the compressed file output path (override if existing). Unless --type is specified, will contain compressed data with zero-padding at the end to ensure the compressed file size matches the size in stdout.
--type=TYPE
    (optional) If specified, uses specified type for size calculation, and will output blob in delivery format. Output is only compressed if space is saved. Supported types:
	1 - Type A: zstd-chunked, default compression level
--disable_size_alignment
    Do not align compressed output with block size. Incompatible with --type.
--help
    print this usage message.
--verbose
    show debugging information.
```