qos adaptive-policy-group create

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Create an adaptive policy group

Availability: This command is available to cluster administrators at the admin privilege level.

Description

The qos adaptive-policy-group create command creates a new adaptive policy group. After the adaptive policy group is created, you can assign one or more volumes to the policy. When a volume is assigned to an adaptive policy group, the maximum throughput QoS setting automatically adjusts based on volume used space or volume allocated space. QoS minimum throughput setting is calculated from the expected-iops parameter and volume allocated size. It is set only for the volumes that reside on AFF platforms.

After you create an adaptive policy group, use the volume create command or volume modify command to apply the adaptive policy group to a volume.

Parameters

-policy-group <text> - Name

Specifies the name of the adaptive policy group. Adaptive policy group names must be unique and are restricted to 127 alphanumeric characters including underscores "_" and hyphens "-". Adaptive policy group names must start with an alphanumeric character. Use the qos adaptive-policy-group rename command to change the adaptive policy group name.

-vserver <vserver name> - Vserver

Specifies the data Vserver to which this adaptive policy group belongs to. You can apply this adaptive policy group to only the storage objects contained in the specified Vserver. If the system has only one Vserver, then the command uses that Vserver by default.

-expected-iops {<integer>[IOPS[/{GB|TB}]] (default: TB)} - Expected IOPS

Specifies the minimum expected IOPS per TB or GB allocated based on volume allocated size.

-peak-iops {<integer>[IOPS[/{GB|TB}]] (default: TB)} - Peak IOPS

Specifies the maximum possible IOPS per TB or GB allocated based on volume allocated size or volume used size.

[-absolute-min-iops <qos_tput>] - Absolute Minimum IOPS

Specifies the absolute minimum IOPS which is used as an override when the expected IOPS is less than this value. The default value is computed as follows:

if expected-iops >= 6144/TB, then absolute-min-iops = 1000IOPS; if expected-iops >= 2048/TB and expected-iops < 6144/TB, then absolute-min-iops = 500IOPS; if expected-iops >= 1/MB and expected-iops < 2048/TB, then absolute-min-iops = 75IOPS.

[-peak-iops-allocation {used-space|allocated-space}] - Peak IOPS Allocation

Specifies the peak IOPS allocation policy. The allocation policy is either allocated-space or used-space . When the peak-iops-allocation policy is set to allocated-space , the peak IOPS is calculated based on the size of the volume. When the peak-iops-allocation policy is set to used-space , the peak IOPS is calculated based on the amount of data stored in the volume taking into account storage efficiencies. The default value is used-space .

Examples

cluster1::> qos adaptive-policy-group create p1 -vserver vs1
            -expected-iops 100IOPS/TB -peak-iops 1000/TB

Creates the "p1" adaptive policy group which belongs to Vserver "vs1" with expected-iops of 100IOPS/TB and peak-iops of 1000IOPS/TB with default value for absolute-min-iops

cluster1::> qos adaptive-policy-group create p2 -vserver vs1
        -expected-iops 100IOPS/GB -peak-iops 1000IOPS/GB
        -absolute-min-iops 200IOPS

Creates the "p1" adaptive policy group which belongs to Vserver "vs1" with expected-iops of 100IOPS/TB and peak-iops of 1000IOPS/TB with the absolute-min-iops set to 200IOPS.