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qospolicy modify

Sara Levy
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This command modifies a QoS policy.

Usage

qospolicy modify --id ID
                [--mode STATIC|USED_CAPACITY|PROVISIONED_CAPACITY]
                [--limit-by BW_IOPS|BW|IOPS]
                [--static-limits STATIC_LIMITS]
                [--capacity-limits CAPACITY_LIMITS]

Required Parameters

--id ID

Specifies which QoS policy to modify.

Options

--mode STATIC|USED_CAPACITY| PROVISIONED_CAPACITY

Sets the mode of provisioning quality of service per view:

  • STATIC. Lets you set minimum and maximum static limits.

  • USED_CAPACITY. Lets you set used capacity-based limits and maximum static limits.

  • PROVISIONED_CAPACITY. Lets you set provisioned capacity-based limits and maximum static limits.

For a detailed explanation of QoS limits and provisioning modes, see Quality of Service Overview.

--limit-by BW_IOPS|BW|IOPS

Sets performance characteristic(s) by which to limit service:

  • BW_IOPS. Lets you set limits on both bandwidth (BW) and I/O per second (IOPS).

  • BW. Lets you set limits on bandwidth only.

    Note

    When this option is specified, the options for setting IOPS limits are not used.

  • IOPS. Lets you set limits on IOPS only.

    Note

    When this option is specified, the options for setting bandwidth limits are not used.

--static-limits STATIC_LIMITS

Enables and sets QoS limits per view.

Tip

Minimum limits can only be set when --mode STATIC is specified.

Specify STATIC_LIMITS as a comma-separated list of key=value pairs. The following keys can be used, depending on the --limit-by setting:

  • min_reads_bw_mbps. Minimum read bandwidth to provision, in MB/s.

  • max_reads_bw_mbps. Maximum read bandwidth to provision, in MB/s.

  • min_reads_iops. Minimum read IOPS to provision,

  • max_reads_iops. Maximum read IOPS to provision.

  • min_writes_bw_mbps. Minimum write bandwidth to provision, in MB/s.

  • max_writes_bw_mbps. Maximum write bandwidth to provision, in MB/s.

  • min_writes_iops. Minimum write IOPS to provision.

  • max_writes_iops. Maximum write IOPS to provision.

For example:

max_reads_bw_mbps=1024,max_writes_iops=2048

--capacity-limits CAPACITY_LIMITS

Enables and sets QoS limits per unit of used or provisioned logical capacity, depending on the provisioning mode (see also --mode).

Specify CAPACITY_LIMITS as a comma-separated list of key=value pairs, where the following keys can be used, depending on the --limit-by setting:

  • max_reads_bw_mbps_per_gb_capacity. Maximum read bandwidth to provision per GB of used logical or provisioned logical capacity, depending on the provisioning mode (set by --mode).

  • max_reads_iops_per_gb_capacity. Maximum read IOPS to provision per GB of used logical or provisioned logical capacity, depending on the provisioning mode (set by --mode).

  • max_writes_bw_mbps_per_gb_capacity. Maximum write bandwidth to provision per GB of used logical or provisioned logical capacity, depending on the provisioning mode (set by --mode).

  • max_writes_iops_per_gb_capacity. Maximum write IOPS to provision per GB of used logical or provisioned logical capacity,depending on the provisioning mode (set by --mode).

For example:

max_reads_bw_mbps_per_gb_capacity=1024,max_writes_iops_per_gb_capacity=2048

Example

vcli: admin> qospolicy modify --id 3 --mode STATIC --limit-by BW_IOPS --static-limits max_reads_bw_mbps=1024,max_reads_iops=1024,max_writes_iops=2048

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