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I’m trying to find settings for compression level in Apache Commons Compress lib for tar and gzip archive types.
Could you please tell is it supported by the library? If yes, how can I configure it?
You can’t.
First, tar does not compress at all; it’s simply an archive format.
Second, gzip uses a single compression type, deflate. Compression schemes that allow “levels” uses those levels to select between algorithms (or, in the case of lossy compression, how much information to discard).