: By treating files as a single stream, the algorithm (usually LZMA or LZMA2 ) can find redundancies across different files, significantly reducing the total size—especially if the files are similar.
7-zip default compression level (split from solid block thread) JSB1213GcP1.7z
In a solid archive, multiple files are concatenated and treated as a . This approach offers several advantages and trade-offs: : By treating files as a single stream,
: To extract a specific file from the middle of a solid archive, the software must decode all preceding data in that block, which can be slower than extracting from a non-solid ZIP archive. You can manage these settings in the 7-Zip
You can manage these settings in the 7-Zip interface by adjusting the , which determines how many files or how much data is grouped into a single stream.
: If a solid archive becomes corrupted, it may be impossible to recover any files within the damaged block, whereas non-solid archives often allow for the recovery of undamaged individual files.