-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
-nice rsync $T/$B backup::backup --fuzzy
+nice tar --create --dereference --directory=$T --warning=no-file-changed --exclude=wiki-<%= @name %>-$D/www/w/images/thumb --exclude=wiki-<%= @name %>-$D/www/w/.git --exclude=wiki-<%= @name %>-$D/www/w/extensions/*/.git wiki-<%= @name %>-$D | nice gzip --rsyncable -9 > $T/$B
+nice rsync --preallocate --fuzzy $T/$B backup::backup