How The Backup Process Has Changed

One downside is that unless you configure it with --enable-mode=64, it has 
*enormous* memory requirements (as in `backing up a million files uses 
several Gb of RAM'). With --enable-mode=64 it only needs several hundred 
Mb, which is still rather nasty.

But, well, it works. (I use it too, in conjunction with par2 and a huge 
pile of ugly scripting. The huge pile of ugly scripting appears to be de 
rigeur for Unix backup systems.)