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Windows 7: Do you have a prefered file compression software or file format?


17 Apr 2013   #1

Windows 7 Professional 32 bit
 
 
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 System SpecsSystem Spec
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17 Apr 2013   #2

Microsoft Community Contributor Award Recipient

Windows 7 Ult. x64 Windows 8.1 x64
 
 

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




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