pcodec CLI

Setup

You can compress, decompress, and inspect .pco files using our simple CLI. Follow this setup:

1. Install Rust: https://www.rust-lang.org/tools/install
2. cargo install pco_cli

This provides you with the pcodec command.

Command Info

You can always get help, e.g. pcodec, pcodec compress --help.

Compress

This command compresses a single column of a .csv or .parquet file into a .pco file. If delta encoding order (--delta-order) is not specified, the default behavior is to use the first numbers and make an educated guess for the best delta encoding order.

Examples:

```shell pcodec compress --csv my.csv --col-name mycolumn out.pco pcodec compress --parquet my.snappy.parquet --col-name mycolumn out.pco

pcodec compress \ --csv my.csv \ --col-idx 0 \ --csv-has-header \ --dtype u32 \ --level 7 \ --overwrite \ out.pco

pcodec compress \ --csv time_series.csv \ --col-name temperature \ --dtype f32 \ --delta-order 3 \ out.pco ```

Decompress

This command prints numbers in a .pco file to stdout.

Examples:

shell pcodec decompress --limit 10 in.pco

Inspect

This command prints out information about a .pco file.

Examples:

shell % pcodec inspect in.pco

Versioning

The major and minor semver versions of this crate are meant to match that of pco. However, the patch version is not related to pco's patch version.