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3.3. Host Network Quality of Service

Host network quality of service configures the networks on a host to enable the control of network traffic through the physical interfaces. Host network quality of service allows for the fine tuning of network performance by controlling the consumption of network resources on the same physical network interface controller. This helps to prevent situations where one network causes other networks attached to the same physical network interface controller to no longer function due to heavy traffic. By configuring host network quality of service, these networks can now function on the same physical network interface controller without congestion issues.

3.3.1. Creating a Host Network Quality of Service Entry
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Create a host network quality of service entry.

Creating a Host Network Quality of Service Entry

  1. Click Compute Data Centers.
  2. Click a data center’s name to open the details view.
  3. Click the QoS tab.
  4. Under Host Network, click New.
  5. Enter a Qos Name and a description for the quality of service entry.
  6. Enter the desired values for Weighted Share, Rate Limit [Mbps], and Committed Rate [Mbps].
  7. Click OK.

Host network quality of service settings allow you to configure bandwidth limits for outbound traffic.

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Table 3.2. Host Network QoS Settings
Field NameDescription

Data Center

The data center to which the host network QoS policy is to be added. This field is configured automatically according to the selected data center.

QoS Name

A name to represent the host network QoS policy within the Manager.

Description

A description of the host network QoS policy.

Outbound

The settings to be applied to outbound traffic.

  • Weighted Share: Signifies how much of the logical link’s capacity a specific network should be allocated, relative to the other networks attached to the same logical link. The exact share depends on the sum of shares of all networks on that link. By default this is a number in the range 1-100.
  • Rate Limit [Mbps]: The maximum bandwidth to be used by a network.
  • Committed Rate [Mbps]: The minimum bandwidth required by a network. The Committed Rate requested is not guaranteed and will vary depending on the network infrastructure and the Committed Rate requested by other networks on the same logical link.

To change the maximum value allowed by the Rate Limit [Mbps] or Committed Rate [Mbps] fields, use the engine-config command to change the value of the MaxAverageNetworkQoSValue configuration key. You must restart the ovirt-engine service for the change to take effect. For example: 

# engine-config -s MaxAverageNetworkQoSValue=2048
# systemctl restart ovirt-engine
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3.3.3. Removing a Host Network Quality of Service Entry
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Remove an existing network quality of service entry.

Removing a Host Network Quality of Service Entry

  1. Click Compute Data Centers.
  2. Click a data center’s name to open the details view.
  3. Click the QoS tab.
  4. Under Host Network, select a host network quality of service entry and click Remove.
  5. Click OK when prompted.
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