If the tally is using up too much disk I/O, you can slow down the dataskq using the ionice binary, if you have it.

限制 dataskq IO占用率, e编辑:

/etc/cron.d/directadmin_cron

or on FreeBSD:

/etc/crontab

打开文件并找到

* * * * * root /usr/local/directadmin/dataskq

修改为:

* * * * * root /usr/bin/ionice -c2 -n7 /usr/local/directadmin/dataskq

of course, you'll need to ensure that you actually have the /usr/bin/ionice binary. Install it if you don't.
Reload crond (or cron) after you make the change.

For backups, you can have the dataskq insert the ionice command in front of all tar, zip and unzip commands:
http://www.directadmin.com/features.php?id=1423

CentOS 安装 ionice:

yum install util-linux

Debian:

apt-get install util-linux

相关官方文档：http://help.directadmin.com/item.php?id=525

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