Set Host-LU QoS

Overview

This function assigns an LU QoS group to a "host - CA port - LUN group" on which the host affinity setting has been configured. A bandwidth limit (the maximum performance limit) is configured to each host LUN in an LU QoS group.

Caution

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.
When assigning an LU QoS group to the "Host - CA Port - LUN Group", check the number of host LUNs and the current usage for the LUN group, and assign the appropriate LU QoS group.

Note

Before executing this function, configure a bandwidth limit on each host LUN. Refer to the [Add LU QoS Group] function for details.
To check the number of host LUNs and the bandwidth limit of each LUN in the LU QoS group, use the [Modify LU QoS Group] function.
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.
Configure the CA port bandwidth limit on each CA port. Refer to the [Set FC Port QoS] function, the [Set iSCSI Port QoS] function, or the [Set SAS Port 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

Host - CA Port - LUN Group : LU QoS Group Setting

Item	Description
Host	The host name for which the host affinity setting is configured is displayed. If any host can be the connection target, "All" is displayed.
Host Group	If a host belongs to a host group as a member, the host group name is displayed. If the host does not belong to a host group as a member, a "-" (hyphen) is displayed. If any host can be the connection target, "All" is displayed.
CA Port	The location information of the CA port with the host affinity setting 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
CA Port Group	If a CA port belongs to a CA port group as a member, the CA port group name is displayed. If the CA port does not belong to a CA port group as a member, a "-" (hyphen) is displayed.
LUN Group: LU QoS Group No.	[LUN group] The LUN group name with the host affinity setting is displayed. If the host, ports, and LUNs are allocated without specifying a host group or port group by an application other than Web GUI, a "-" (hyphen) is displayed. [LU QoS Group No.] If an LU QoS group has already been assigned to a LUN group, the LU QoS group number is displayed. To add or change a LU QoS group number, click the [Browse...] button, and select a LU QoS group number to assign on the [Select LU QoS Group] Screen.

[Select LU QoS Group] Screen

Item	Description
Radio buttons to select an LU QoS group	Select the radio button for the LU QoS group number to assign to a "Host - CA port - LUN group".
LU QoS Group No.	The LU QoS group number (0 to 1055), which has been registered in the storage system, is displayed.

Function Button

Item	Description
[Browse...]	The [Select LU QoS Group] screen is displayed.

Operating Procedures

Select the "Host - CA Port - LUN Group" to set the Host-LU QoS (multiple selections can be made) and click [Set Host-LU QoS] in [Action].
Click the [Browse...] button for a "LUN Group : LU QoS Group No.".

→ The [Select LU QoS Group] screen is displayed.
Select an LU QoS group, and click the [OK] button.

→ The display returns to the initial screen.
After confirming the association between "Host" and "CA Port" as well as "LUN Group" and "LU QoS Group No.", click the [Set] button.

→ A confirmation screen appears.
Click the [OK] button.

→ The Host-LU QoS setting starts.
Click the [Done] button to return to the [Host-LU QoS] screen.