Commands for QoS operations

Use the following CCI commands to specify the QoS settings and to obtain QoS monitor information. For details, see the Command Control Interface Command Reference.

Note: The QoS settings for a volume used as a CCI command device or a remote CCI command device are guarded and cannot be set.

Function	Command	Setting item	Command option
Configuring the settings on a volume	raidcom modify ldev	Upper limit	-upper_throughput_io -upper_data_trans_mb
		Lower limit	-lower_throughput_io -lower_data_trans_mb
		QoS priority	-response_priority
		Threshold period for alert notification	-upper_alert_time -lower_alert_time -response_alert_time
Configuring the settings on a QoS group	raidcom add qos_grp	Creating a QoS group	-qos_grp_id
	raidcom add qos_grp	Adding a volume to a QoS group	-qos_grp_id -ldev_id
	raidcom delete qos_grp	Deleting a QoS group	-qos_grp_id
	raidcom delete qos_grp	Deleting a volume from a QoS group	-qos_grp_id -ldev_id
	raidcom modify qos_grp	Upper limit	-upper_throughput_io -upper_data_trans_mb
		QoS priority	-response_priority
		Threshold period for alert notification	-upper_alert_time -response_alert_time
Viewing the settings for a volume	raidcom get ldev	Viewing the QoS settings configured on a volume	-key qos
Viewing the settings for a QoS group	raidcom get qos_grp	Viewing the QoS settings configured on a QoS group	-key monitor
Viewing the settings for a volume in a QoS group	raidcom get qos_grp	Viewing a volume included in a QoS group	-key resource -qos_grp_id
QoS monitoring for a volume	raidcom get ldev	Viewing the performance information on a volume	-key qos_monitor
QoS monitoring for a volume	raidcom monitor resource*	Viewing the performance information on a volume	-monitor_type qos_ldev
QoS monitoring for a QoS group	raidcom get qos_grp	Viewing the performance information on a QoS group	-key monitor
QoS monitoring for a QoS group	raidcom monitor resource*	Viewing the performance information on a QoS group	-monitor_type qos_grp
* This command is used for periodically collecting the performance information. To run this command, log in to the storage system with a user account belonging to the user group for which all resource groups are set.

Verifying a volume or QoS group that has reached the alert conditions

You can use CCI to check the last time an alert was issued for a monitored volume or QoS group. If you receive an alert notification, check the last time the upper-limit value was exceeded for every monitored volume or QoS group.

Command example for a volume:

C:\HORCM\etc>raidcom get ldev -ldev_list defined -fx -key qos
LDEV# UPPER_THROUGHPUT(IOps) UPPER_DATA_TRANS(MBps) UPPER_ALERT(s) UPPER_ALERT_NOTICE
LOWER_THROUGHPUT(IOps) LOWER_DATA_TRANS(MBps) LOWER_ALERT(s) LOWER_ALERT_NOTICE PRIORITY RESPONSE_TARGET(ms) RESPONSE_ALERT(s) RESPONSE_ALERT_NOTICE
a000                          1000                        1                    1
2020 03-10T15:17:28                   100
1              1 2020 03-10T15:17:28        1
10                 1 -

Note:

UPPER_ALERT_NOTICE indicates the time the volume or QoS group reached the upper limit even if the time is before the alert notification.
UPPER_ALERT_NOTICE does not indicate the time if the volume or QoS group has never reached the upper limit.
LOWER_ALERT_NOTICE indicates the time the volume is determined not to reach the lower limit even if the time is before the alert notification.
LOWER_ALERT_NOTICE does not indicate the time if the I/O throughput of the volume is always equal to or more than the lower limit.
RESPONSE_ALERT_NOTICE indicates the time the volume or QoS group exceeds the target response time even if the time is before the alert notification.
RESPONSE_ALERT_NOTICE does not indicate the time if the volume or QoS group has never exceeded the target response time.
The time that reached an alert condition is recorded based on the system date and time (date, time, and time zone) of the storage system.
Therefore, if you change the system date and time of the storage system, the time which previously reached the alert condition becomes incorrect after the change.