Enabling Quotas on a Virtuozzo® VPS

If you are running cPanel and WHM on a Virtuozzo Virtual Private Server (VPS), you may need to take extra steps to enable quotas.

Important: cPanel and WHM quotas will not work unless both first- and second-level Virtuozzo quotas are enabled.

About Virtuozzo and Quotas

There are 2 types of disk quotas on a Virtuozzo server:

1. Per-container, or first-level, quotas allow system administrators to control the sizes of VPS file systems by limiting the amount of disk space and the number of inodes a Virtual Server (also called a Container) can use.
2. Per-user and per-group, or second-level, quotas enable the Virtual Server administrator to limit the amount of disk space and the number of inodes that users and groups within the VPS can use.

First-level Quotas

First-level quotas are enabled during the Container (or VPS) start-up process.

To see whether first-level quotas have already been enabled, issue the following command:

• vzquota show Container_ID

Second-level Quotas

Second-level disk quotas are controlled by the QUOTAUGIDLIMIT parameter in the Container configuration file.

By default, the value of this parameter is zero, which disables per-user/group quotas. To view the parameter, issue the command:

• grep -i QUOTAUGIDLIMIT /etc/sysconfig/vz-scripts/CT_ID.conf

If you get an empty result, or a result of zero, second-level quotas are not supported by this environment.

To turn on second-level quotas for the Container, see http://download.swsoft.com/virtuozzo/virtuozzo4.0/docs/en/lin/VzLinuxUG/293.htm.

Setting the QUOTAUGIDLIMIT parameter to a non-zero value will:

1. Enable second-level (per-user and per-group) disk quotas for the VPS (or Container).
2. Limit the number of file owners and groups within this VPS, including Linux system users, to the value assigned to this parameter.

• Note: In theory, you can create extra VPS users, but once the number of file owners inside the VPS reaches the limit, these extra users will not be able to own files.