It is highly beneficial for archiving many small files with similar content (e.g., source code, log files, repetitive backups).
Solid compression is a specialized feature in 7-Zip ( .7z ) that significantly improves compression ratios by treating all files in an archive as one continuous data block. Unlike standard zip, which compresses files individually, solid mode helps eliminate redundancy across similar files.
In solid mode ( -ms=on ), 7-Zip merges all files into a single, massive block of data before applying compression (typically LZMA/LZMA2). This allows the algorithm to find repeating patterns across multiple files rather than just within each individual file.
