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        "author": "Andrey Kislyuk",
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            "Development Status :: 4 - Beta",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: Apache Software License",
            "Operating System :: MacOS :: MacOS X",
            "Operating System :: POSIX",
            "Programming Language :: Python",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3.3",
            "Programming Language :: Python :: 3.4",
            "Topic :: Software Development :: Libraries :: Python Modules"
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        "description": "**WARNING: Alpha code under development**\n\n# XBCF: eXtensible Block Compression Format\n\nXBCF is a container format designed for indexed block compression on Amazon S3 or similar distributed storage systems with high seek latencies. It supports the following features:\n* Configurable compression codec\n* Configurable block encryption codec\n* Seeking support, with granularity equal to the compression block size (1MB by default)\n* Recursive encapsulation of XBCF containers\n  * Multiple worker nodes can independently upload parts of the same multi-part upload, each formatted as XBCF\n  * At close time, a higher-level XBCF is concatenated from the parts\n\n## Dependencies\nThis proof-of-concept implementation works in Python.\n```\npip install snappy lz4 numpy boto\n```\n\n## Format specification\n* Magic header (8 bytes) == \"XBCF\" (0-padded)\n* Level (8 bytes) (unsigned int; if level is 0, blocks are raw data; otherwise, blocks are themselves XBCF-formatted)\n* Compression method (8 bytes) == \"LZ4\" (0-padded)\n* Reserved (8 bytes) (padding to 32 bytes)\n* Cipher name (16 bytes) == \"AES-CBC\" or \"null\" (0-padded)\n* IV (16 bytes)\n(If cipher != \"null\", all subsequent data is encrypted.)\n* Block size (uncompressed) (unsigned int; 8 bytes); if size is 0, block size is variable and block size table is present\n* Number of blocks (unsigned int; 8 bytes)\n* Reserved (16 bytes) (padding to 32 bytes)\n* Block start offset table (8 bytes * (Number of blocks))\n* If block size is 0:\n  * Block size table (uncompressed sizes) (8 bytes * (Number of blocks))\n* Blocks",
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        "license": "Apache Software License",
        "maintainer": null,
        "maintainer_email": null,
        "name": "xbcf",
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        "platform": "MacOS X,Posix",
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        "summary": "eXtensible Block Compression Format",
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