hello zmanda

I need to nice and ionice amanda down to the lowest possible priority so that it does not overwhelm the production servers. here is the line I need to cron:

0 */4 * * * /usr/bin/sudo /bin/nice -n 19 /usr/bin/ionice -c3 /usr/sbin/amdump acadaca  | mail -s "Amanda Backups Performed" root@acadaca.net

If I run it on the command line this is what I see:

-sh-3.2$  /usr/bin/sudo /bin/nice -n 19 /usr/bin/ionice -c3 /usr/sbin/amdump acadaca
amdump: running as user "root" instead of "amandabackup"

And if I don't use sudo I don't have permissions to nice the command:

-sh-3.2$ /bin/nice -n 19 /usr/bin/ionice -c3 /usr/sbin/amdump acadaca
ioprio_set: Operation not permitted
thoughts and suggesstions are welcomed!