Hello All,
I recently experimented with the compression options of the [outputs.file] plugin. You can choose between the “zstd”, “zlib”, and “gzip” methods.
“gzip” is clear to me, that’s what I’m currently using. Decompression under Linux is very easy with:
cat [my_compressed_output] | gunzip | tee [uncompressed_file]
I’m completely unfamiliar with “zstd.” I wanted to use “zlib,” which is known to be used as an algorithm behind the (un)zip program. However, this (zip) is usually applied to individual or multiple files. So I looked for a “stream-like” application such as gunzipfor “zlib” compressed data. To do this, I installed and tested zlib-flate (from qpdf package) and (un)pigz, but with little success: One couldn’t read the compressed file at all, while the other only displayed the first line in plain text and claimed that the rest of the input data was corrupt. 
How would you correctly decompress “zlib” compressed data on Linux? What about “zstd”?
Thanks in advance and best regards,
conne914
