`bwlimit`: `integer (0 - N)` (default=`0`):: Limit I/O bandwidth (KBytes per second). `compress`: `(0 | 1 | gzip | lzo)` (default=`0`):: Compress dump file. `dumpdir`: `string` :: Store resulting files to specified directory. `exclude-path`: `string` :: Exclude certain files/directories (shell globs). `ionice`: `integer (0 - 8)` (default=`7`):: Set CFQ ionice priority. `lockwait`: `integer (0 - N)` (default=`180`):: Maximal time to wait for the global lock (minutes). `mailnotification`: `(always | failure)` (default=`always`):: Specify when to send an email `mailto`: `string` :: Comma-separated list of email addresses that should receive email notifications. `maxfiles`: `integer (1 - N)` (default=`1`):: Maximal number of backup files per guest system. `mode`: `(snapshot | stop | suspend)` (default=`snapshot`):: Backup mode. `pigz`: `integer` (default=`0`):: Use pigz instead of gzip when N>0. N=1 uses half of cores, N>1 uses N as thread count. `remove`: `boolean` (default=`1`):: Remove old backup files if there are more than 'maxfiles' backup files. `script`: `string` :: Use specified hook script. `stdexcludes`: `boolean` (default=`1`):: Exclude temporary files and logs. `stopwait`: `integer (0 - N)` (default=`10`):: Maximal time to wait until a guest system is stopped (minutes). `storage`: `string` :: Store resulting file to this storage. `tmpdir`: `string` :: Store temporary files to specified directory.