3.4.4.4. Setting RATE and RATEBOUND Parameters

The optional RATE parameter allows you to guarantee virtual machines and containers outgoing bandwidth to destinations in a specific network class on a specific Ethernet device. The guaranteed bandwidth is not a limit (unless the RATEBOUND parameter is also set to on, see below). A virtual machine or container can additionally obtain unused bandwidth from the bandwidth pool defined by TOTALRATE.

You can set the guaranteed bandwidth in two ways:

  1. For all virtual machines and containers on the host by setting RATE in the global configuration file /etc/vz/vz.conf.

    The parameter is set as <NIC>:<network_class>:<bandwidth_in_Kbps>. For example, to guarantee all virtual machines and containers on the host the bandwidth of at least 8 Kbps for outgoing traffic in network class 1 on the Ethernet device enp0s5, set the RATE parameter to enp0s5:1:8.

  2. For specific virtual machines or containers by means of the prlctl set --rate command.

    For example, to guarantee the container MyCT the bandwidth of at least 16 Kbps for outgoing traffic in network class 1, run

    # prlctl set MyCT --rate 1:16

    This command sets the bandwidth for the default network adapter only. If you need to set bandwidth for other network adapters, set RATE in /etc/vz/vz.conf.

Note

Note: It is recommended to increase RATE value in 8 Kbps increments and set it to at least 8 Kbps.

The optional RATEBOUND parameter specifies whether the network bandwidth guaranteed by RATE is also a limit. By default, this feature is disabled for all newly created virtual machines and containers so they may additionally obtain unused bandwidth from the pool set by TOTALRATE.

You can limit bandwidth of virtual machines and containers to the guaranteed value as follows:

  1. For all virtual machines and containers on the host by setting RATEBOUND in the global configuration file /etc/vz/vz.conf (omitted by default).

  2. For specific virtual machines or containers by means of the prlctl set --ratebound command. For example: 

    # prlctl set MyCT --ratebound yes

If set, values of RATE and RATEBOUND provided for specific virtual machines and containers are chosen over global values in /etc/vz/vz.conf.

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