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Specify ' qs' in Parameters field (or use -mqs switch for command line version).You can increase compression ratio with the following methods: Note that sorting "by type" has some drawbacks.įor example, NTFS volumes use sorting order "by name", so if an archive usesĪnother sorting, then the speed of some operations for files with unusual orderĬan fall on HDD devices (HDDs have low speed for "seek" operations). If there are similar files in different folders, the sorting "by type" can provide

If dictionary size is smaller than total size of files. You can get big difference in compression ratio for different sorting methods, (or -mqs switch for command line version).

sorting by type, if ' qs' is specified in Parameters field in "Add to archive" window,.

New version of 7-Zip supports two sorting orders: Old version of 7-Zip (before version 15.06) used file sorting "by type" ("by extension"). New versions of 7-Zip (starting from version 15.06) use another file sorting Why 7z archives created by new version of 7-Zip can be larger than archives created by old version of 7-Zip?

Then you can change file associations and some other options. Right-click the icon of 7-Zip File Manager, and then click Run as administrator. You must run 7-Zip File Manager in administrator mode. How can I set file associations to 7-Zip in Windows 7 and Windows Vista? User FAQ Can I use 7-Zip in a commercial organization?