[tex-live] Building TeXLive iso image

[Vafa Khalighi]

I have got a copy of TeXLive repository on my machine which is about 4.7 GB
(this is by rsync excluding .svn) but I can see that the TL10.iso at
http://ctan.unsw.edu.au/systems/texlive/Images/ is almost 1.9GB.

Can you please tell me how the iso image is built that it is 1.9GB?

Thanks
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