Do you have a prefered file compression software or file format?


  1. Posts : 155
    Windows 7 Professional 32 bit
       #1

    Do you have a prefered file compression software or file format?


    Iuse winrar and need to know if there are any differences between the different compression formats ( zip, rar, tar) and if one of them is more robust than the rest?
      My Computer


  2. Posts : 19,383
    Windows 10 Pro x64 ; Xubuntu x64
       #2

    Hi,

    .tar is Unix-based and natively doesn't compress data (it was originally designed for tape backups in the 70's). If you use TCShell, Bourne, Korn etc. in a Unix environment, then you can use the gzip command line argument to compress a modified version of the .tar format.

    There is little difference between compression ratios for .rar (propreity format) and .zip (now public domain) formats - both are extremely robust and support AES encryption.

    Personally, I prefer the .7z format used by 7ZIP - it provides custom compression ratios, and on very large files consistently achieves about 10% greater compression, albeit it at a slower speed (greater compression = slower speed).

    I regularly use the command line version of 7ZIP within .BAT files to compress data before using ROBOCOPY to backup the .7z files.

    Regards,
    Golden
      My Computer


 

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