ONTAP 9.12.1 commands

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  • ONTAP 9.12.1 commands(CA08871-263en.pdf)
  • qos settings cache show

    Display list of cache policies

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

    Description

    The ` qos settings cache show` shows the current caching-policies, class to which they belong, the number of workloads associated with each of the policies, and whether or not they are set to default. The following external-cache policies are available:

    • none - Does not cache any user data or metadata blocks.

    • auto - Read caches all metadata and randomly read user data blocks, and write caches all randomly overwritten user data blocks.

    • all - Read caches all data blocks read and written. It does not do any write caching.

    • all-random_write - Read caches all data blocks read and written. It also write caches randomly overwritten user data blocks.

    • all_read - Read caches all metadata, randomly read, and sequentially read user data blocks.

    • all_read-random_write - Read caches all metadata, randomly read, and sequentially read user data blocks. It also write caches randomly overwritten user data blocks.

    • all_read_random_write - Read caches all metadata, randomly read, sequentially read and randomly written user data.

    • all_read_random_write-random_write - Read caches all metadata, randomly read, sequentially read, and randomly written user data blocks. It also write caches randomly overwritten user data blocks.

    • meta - Read caches only metadata blocks.

    • meta-random_write - Read caches all metadata and write caches randomly overwritten user data blocks.

    • noread-random_write - Write caches all randomly overwritten user data blocks. It does not do any read caching.

    • random_read - Read caches all metadata and randomly read user data blocks.

    • random_read_write - Read caches all metadata, randomly read and randomly written user data blocks.

    • random_read_write-random_write - Read caches all metadata, randomly read, and randomly written user data blocks. It also write caches randomly overwritten user data blocks.

    Note that in a caching-policy name, a hyphen (-) separates read and write caching policies.

    Parameters

    { [-fields <fieldname>,…​]

    The input to this parameter is one of the following: {cache-setting|class|default|num-workloads}. If you use this parameter, the command displays information related to the specified input field.

    | [-instance ] }

    If you use this parameter, the command displays information about the caching-policies in a list format.

    [-cache-setting <text>] - Cache Policy Name

    The input to this parameter is any one of the above listed caching-policies. If you use this parameter, the command displays information corresponding to the specified caching-policy.

    [-class <QoS Configuration Class>] - Cache Policy Class

    The input to this parameter is one of the following: {undefined|preset|user-defined|system-defined|autovolume}. If you use this parameter, the command displays information corresponding to the specified policy-group class.

    [-default {true|false}] - Is Default?

    The input to this parameter is true and false. If you use this parameter, the command displays information corresponding to entries that have the specified default value.

    [-num-workloads <integer>] - Number Of Workloads With This Policy

    The input to this parameter is an integer. If you use this parameter, the command displays information about policy-groups matching the specified number of workloads.

    Examples

    cluster1::> qos settings cache show
    Policy Name  Class        Num Workloads        Default
    ------------ ------------ -------------        -------
    all          preset       0                    false
    all-random_write
                 preset       0                    false
    all_read     preset       0                    false
    all_read-random_write
                 preset       0                    false
    all_read_random_write
                 preset       0                    false
    all_read_random_write-random_write
                 preset       0                    false
    auto         preset       2                    false
    meta         preset       0                    false
    meta-random_write
                 preset       0                    false
    none         preset       0                    false
    noread-random_write
                 preset       0                    false
    random_read  preset       25                   false
    random_read_write
                 preset       0                    false
    random_read_write-random_write
                 preset       28                   true
    14 entries were displayed.

    Shows QoS settings for the caching policies.

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