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Various data compression methods for file archiving using 7z, other programs
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| :: Method 1 (Zip compression using 15 passes with deflate) | |
| "%PROGRAMFILES%\7-Zip\7z.exe" a -mm=Deflate -mfb=258 -mpass=15 -r "%USERPROFILE%\Downloads\samples1.zip" "%USERPROFILE%\Downloads\zipfiles\*" | |
| 1294MB -> 1192 MB (7.9% compression) | |
| :: Method 2 (Zip compression using max compression with deflate) | |
| "%PROGRAMFILES%\7-Zip\7z.exe" a "%USERPROFILE%\Downloads\samples1.zip" "%USERPROFILE%\Downloads\zipfiles\*" -tzip -mx9 -mm=Deflate64 | |
| 1294 MB -> 1189 MB (8.2% compression) | |
| :: Method 3 (7z lzma compression using max compression with 32mb part.) | |
| "%PROGRAMFILES%\7-Zip\7z.exe" a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on "%USERPROFILE%\Downloads\samples1.7z" "%USERPROFILE%\Downloads\zipfiles\*" | |
| :: Method 3.1 (7z lzma compression using max compression with 32mb part and split into 512MB volumes) | |
| "%PROGRAMFILES%\7-Zip\7z.exe" a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on -v512m "%USERPROFILE%\Downloads\samples1.7z" "%USERPROFILE%\Downloads\zipfiles\*" | |
| 1294 MB -> 1049MB (19% compression) | |
| :: Method 4 (zpaq journaling archive using 4-passes) | |
| zpaq.exe -m4 add "%USERPROFILE%\Downloads\samples1.zpaq" "%USERPROFILE%\Downloads\zipfiles\*" | |
| 1294MB -> 959.973669 MB (25.9% compression) |
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