B=wiki-<%= @name %>-$D.tar.gz
mkdir $T/wiki-<%= @name %>-$D
-mysqldump --user="<%= @database_params[:username] %>" --password="<%= @database_params[:password] %>" --opt --skip-lock-tables --single-transaction "<%= @database_params[:name] %>" | xz -9c > $T/wiki-<%= @name %>-$D/wiki.sql.xz
+echo '[mysqldump]' > $T/mysqldump.opts
+echo 'user=<%= @database_params[:username] %>' >> $T/mysqldump.opts
+echo 'password=<%= @database_params[:password] %>' >> $T/mysqldump.opts
+mysqldump --defaults-file=$T/mysqldump.opts --opt --skip-lock-tables --single-transaction "<%= @database_params[:name] %>" | lz4 -9 > $T/wiki-<%= @name %>-$D/wiki.sql.lz4
ln -s <%= @directory %> $T/wiki-<%= @name %>-$D/www
-#make backup rsyncable
-GZIP="--rsyncable -9"
-export GZIP
-nice tar --create --gzip --dereference --directory=$T --file=$T/$B wiki-<%= @name %>-$D
-nice rsync $T/$B backup::backup --fuzzy
+export GZIP="--rsyncable -9" #make backup rsyncable
+nice tar --create --gzip --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 --file=$T/$B wiki-<%= @name %>-$D
+nice rsync --preallocate --fuzzy $T/$B backup::backup
rm -rf $T