![]() I'm not a RAR user so I can't tell you it's default configuration.Ĭommon archivers on Linux/Unix/BSD systems also implicitly do solid compression by concatenating all the files together into a single file (most often via tar) before compressing that single file as a large block. WinRAR and 7-Zip are 2 popular archivers that use it - 7-Zip does by default. If the files are really duplicates (or near duplicates), compression software can exploit that similarity across files to greatly increase the compression ratio. So I was able to save over 9% without using any compression at all! RAR5 compression method, compression set to "Store" and "Save identical files as references" turned on: 23.9 GB (25,722,664,097 bytes) RAR4 compression method, compression set to "Store": 26.1 GB (28,053,815,768 bytes) My quick test on a folder that contains 320,000 files (Baldur's Gate Trilogy with a lot of mods): If all identical files are small enough to fit into compression dictionary, solid archiving can provide more flexible solution than this option. It is recommended to use this option only if you compress a lot of identical files, will not modify an archive later and will extract an archive entirely, without necessity to unpack or skip individual files. Extraction command must involve the first file to create following files successfully. If you modify the first file, following files will also have the modified contents after extracting. You must not delete or rename the first identical file in archive after the archive was created, because it will make extraction of following files using it as a reference impossible. It allows to reduce the archive size, but applies some restrictions to resulting archive. ![]() ![]() If several identical files larger than 64 KB are found, the first file in the set is saved as usual file and all following files are saved as references to this first file. If this option is enabled, WinRAR analyzes the file contents before starting archiving. The new version of WinRAR, 5.00, has introduced the new RAR5 archive format and this feature is one of many improvements: ![]()
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