[jira] [Updated] (ARROW-9648) [C++] LZ4 compression level not supported

["Antoine Pitrou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-9648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou updated ARROW-9648:
----------------------------------
    Labels: good-first-issue  (was: )

> [C++] LZ4 compression level not supported
> -----------------------------------------
>
>                 Key: ARROW-9648
>                 URL: https://issues.apache.org/jira/browse/ARROW-9648
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Pierre
>            Priority: Minor
>              Labels: good-first-issue
>
> Hi,
> I am currently checking the different compression codecs available when writing parquet files.
> Testing LZ4, I got the error message that compression level is not supported.
> {code:python}
> from pyarrow import parquet as pq
> pq.write_table(data, file, compression='LZ4', compression_level=12)
> {code}
> Error message
> {code:bash}
>  File "pyarrow/_parquet.pyx", line 1374, in pyarrow._parquet.ParquetWriter.write_table
> File "pyarrow/error.pxi", line 99, in pyarrow.lib.check_status
> OSError: Invalid: LZ4 doesn't support setting a compression level.
> {code}
> However man page of LZ4 states the following
> {code:bash}
> Operation modifiers
>  -# Compression level, with # being any value from 1 to 12. Higher
>  values trade compression speed for compression ratio. Values
>  above 12 are considered the same as 12. Recommended values are 1
>  for fast compression (default), and 9 for high compression.
>  Speed/compression trade-off will vary depending on data to com‐
>  press. Decompression speed remains fast at all settings.
> {code}
> Please, can you activate compression levels for LZ4?
> Thanks,
> Bests
>  



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