Set iSCSI Port QoS

Overview

This function configures the bandwidth limit (the maximum performance limit) of the iSCSI port.

Caution

  • The bandwidth limit can be configured only for the ports in the port mode of "CA" or "CA/RA". For the ports in the port mode of "RA", the bandwidth limit cannot be configured.

  • If the port mode has been changed from "CA" or "CA/RA" to "RA", the bandwidth limit returns to the default value.

  • This function can be used, irrespective of whether the QoS mode has been enabled or disabled. However, if the QoS mode has been disabled, the host starts the operation within the configured bandwidth limit only when the QoS mode is enabled.

Note

  • Configure the bandwidth limit on each host. Refer to the [Set FC Host QoS] function, the [Set iSCSI Host QoS] function, or the [Set SAS Host QoS] function for details.

  • The host LUN bandwidth limit can be configured in the LU QoS group. Refer to the [Set Host-LU QoS] function for details.

User Privileges

Availability of Executions in the Default Role

Default role Availability of executions
Monitor  
Admin
StorageAdmin
AccountAdmin  
SecurityAdmin  
Maintainer

Refer to "User Roles and Policies" for details on the policies and roles.

Settings

iSCSI Port QoS Setting

In this screen, configure the bandwidth limit of the iSCSI port.

Item Description

Port

The location information of the target port is displayed.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y CA#z Port#w

For the other models

CM#y CA#z Port#w

x: CE number

y: CM number

z: CA number

w: Port number

Type

The type of the target port is displayed.

1G iSCSI

10G iSCSI

Bandwidth Limit

Select the maximum performance in IOPS (throughput value). When not setting the performance limit, select "Unlimited".

The bandwidth limit can be changed using the [Set Port QoS Pattern] function or the "set qos-bandwidth-limit" CLI command. If the value is changed, that value is displayed as an option for this item.

Refer to the "Port QoS" column in "Bandwidth Limit" for the setting value and the default value.

Operating Procedures

  1. Select the iSCSI port to configure the bandwidth limit (multiple selections can be made), and click [Set iSCSI Port QoS] in [Action].

  2. Select the iSCSI port bandwidth limit, and click the [Set] button.

    → A confirmation screen appears.

  3. Click the [OK] button.

    → The iSCSI Port QoS setting starts.

  4. Click the [Done] button to return to the [iSCSI Port QoS] screen.