Thanks alot Cactus,
Actually the uncompressed file is about a 40GB folder containing text files of huge sizes.
So I do not want to put 40GB when I can put its compressed 7GB.
Subversion is optimized for working with text files, subversion is meant for version management. It has a clever mechanism to store the differences for each file with the previous version, for text files at least, I do not think it does that for binaries. By only storing the differences the footprint of the space used is will soon be smaller than for the individual versions combined.
If your data changes over time, as I guess, why else do you want to store it in a subversion repository, only the differences are saved and I therefore suggest storing the files as plain text and not as a tarball, my bet is the individual text files will also be smaller than 7Gb, right?