File size: 4,066 Bytes
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"schema_name": "sample_index_parquet",
"schema_version": 3,
"artifact": "sample_index.parquet",
"format": "parquet",
"row_grain": "one row per WebDataset tar member",
"description": "Physical lookup table for random access into uncompressed WebDataset tar shards. Semantic filtering lives in manifest.parquet.",
"primary_key": [
"sample_key",
"resolution",
"member_suffix"
],
"columns": [
{
"name": "sample_key",
"arrow_type": "string",
"nullable": false
},
{
"name": "match_id",
"arrow_type": "string",
"nullable": false
},
{
"name": "round_id",
"arrow_type": "string",
"nullable": false
},
{
"name": "round_idx",
"arrow_type": "int32",
"nullable": false
},
{
"name": "pov_idx",
"arrow_type": "int32",
"nullable": false
},
{
"name": "resolution",
"arrow_type": "string",
"nullable": false,
"valid_values": [
"720p",
"360p"
]
},
{
"name": "video_width",
"arrow_type": "int32",
"nullable": false
},
{
"name": "video_height",
"arrow_type": "int32",
"nullable": false
},
{
"name": "member_name",
"arrow_type": "string",
"nullable": false,
"description": "Full tar member name, for example {sample_key}.mp4."
},
{
"name": "member_suffix",
"arrow_type": "string",
"nullable": false,
"valid_values": [
"mp4",
"actions.bin",
"state.bin",
"events.json",
"json"
]
},
{
"name": "modality",
"arrow_type": "string",
"nullable": false,
"valid_values": [
"video",
"actions",
"state",
"events",
"metadata"
]
},
{
"name": "content_type",
"arrow_type": "string",
"nullable": false,
"valid_values": [
"video/mp4",
"application/octet-stream",
"application/json"
]
},
{
"name": "shard_path",
"arrow_type": "string",
"nullable": false,
"description": "Relative path to the public shard inside the release repo."
},
{
"name": "shard_id",
"arrow_type": "int32",
"nullable": false
},
{
"name": "member_index",
"arrow_type": "int32",
"nullable": false,
"description": "Zero-indexed member order within the tar shard."
},
{
"name": "member_offset",
"arrow_type": "int64",
"nullable": false,
"description": "Byte offset of the member payload inside the uncompressed tar."
},
{
"name": "member_length",
"arrow_type": "int64",
"nullable": false,
"description": "Payload length in bytes."
},
{
"name": "member_sha256",
"arrow_type": "string",
"nullable": false,
"description": "Hex SHA-256 of the member payload."
},
{
"name": "shard_size_bytes",
"arrow_type": "int64",
"nullable": false
},
{
"name": "shard_sha256",
"arrow_type": "string",
"nullable": false,
"description": "Hex SHA-256 of the full tar shard."
},
{
"name": "tar_format",
"arrow_type": "string",
"nullable": false,
"valid_values": [
"ustar"
]
},
{
"name": "compression",
"arrow_type": "string",
"nullable": false,
"valid_values": [
"none"
],
"description": "Shard tar compression. Current release shards are uncompressed."
}
],
"validation": [
"primary key is unique",
"member_offset >= 0",
"member_length > 0",
"member_sha256 is a 64-character lowercase hex SHA-256",
"shard_sha256 is a 64-character lowercase hex SHA-256",
"HTTP range bytes=member_offset-(member_offset+member_length-1) returns exactly the member payload",
"each sample_key has exactly five member_suffix values per resolution",
"no column is named clip_id"
]
}
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