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