On Wed, 2005-06-22 at 12:54, sharif islam wrote: > Is there any compression mechanism that's rated for tar files as big > as, say, 100GB? I don't believe anyone rates compression programs based the size of the file to be compressed. The problem you need to resolve is having enough space for the compressed file plus the original data. The actual compression will be a factor of the type of data being compressed and the actual algorithm used. Some data can be compressed more than other types of data. There are a number of tools you can use to compress datafiles including gzip or compress (in the ncompress package). I think they use similar compression algorithms. -- Scot L. Harris webid@xxxxxxxxxx As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality. -- Albert Einstein