+export GZIP="--rsyncable -9" #make backup rsyncable
+nice tar --create --gzip --dereference --directory=$T --exclude=wiki-<%= @name %>-$D/www/w/images/thumb --exclude=wiki-<%= @name %>-$D/www/w/.git --exclude=wiki-<%= @name %>-$D/www/w/extensions/*/.git --file=$T/$B wiki-<%= @name %>-$D