A simple CLI to generate car file and compute commp at the same time.
$ go build -o lotus-car$ ./lotus-car -h
NAME:
generate - generate car archive from list of files and compute commp in the mean time
USAGE:
generate [global options] command [command options] [arguments...]
COMMANDS:
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--input value, -i value File to read list of files, or '-' if from stdin (default: "-")
--quantity value, -q value Quantity of car files (default: 3)
--file-size value Target car file size, default to 32GiB size sector (default: 19327352832)
--piece-size value, -s value Target piece size, default to minimum possible value (default: 34359738368)
--out-file value Output file as .csv format to save the car file (default: "./source.csv")
--out-dir value, -o value Output directory to save the car file (default: ".")
--tmp-dir value, -t value Optionally copy the files to a temporary (and much faster) directory
--parent value, -p value Parent path of the dataset
--help, -h show help (default: false)The input file can be a text file that contains a list of file information SORTED by the path. i.e.
[
{
"Path": "test/test.txt",
"Size": 4038,
"Start": 1000, # Inclusive
"End": 2000 # Exclusive
},
{
"Path": "test/test2.txt",
"Size": 3089
}
]The output file is a .csv file that contains a list of pieceCID,fileSize,pieceSize,dataCID, i.e.
baga6ea4seaqm65rsjelthpzxl4xnki36yrio2xqphaxbi5v7jehltvgw7u2mgha,19683716501,34359738368,bafybeifvajapn6oa5wbmsxlxeffueb3ozzcuqxwcgoyradtqdukvzjaczu
baga6ea4seaqaw4j4spzjg7gkdh42gae6zoa42buyxlgvekhp3fpi2t4ym233idy,19202597332,34359738368,bafybeih7mkv4u2tdygwhnhpwfijir6pe62x653iwq2s2nlqj5r25m35hoe
baga6ea4seaqhdoz7ekvsunrlfdb5h4qhm3seu6kqgxnobfqn5apwfdmbwupeedq,19490669522,34359738368,bafybeig5ziizy3vdwqwyf37duf2vnjqmjflxuttphz563h24w7i3zmr54q
The tmp dir is useful when the dataset source is on slow storage such as NFS or S3FS/Goofys mount.