Public/Get-DMStoragePoolPerformance.ps1

function Get-DMStoragePoolPerformance {
    <#
    .SYNOPSIS
        Retrieves realtime performance samples for OceanStor storage pools.
 
    .DESCRIPTION
        Thin wrapper around Get-DMPerformance for object type StoragePool. Accepts one or more
        OceanStorStoragePool objects via pipeline (e.g. from Get-DMstoragePool), batches all
        piped IDs into a single performance_data call per sample -- required because the
        endpoint cannot be invoked concurrently.
 
    .PARAMETER WebSession
        Optional parameter to define the session to be use on the REST call. If not defined, the module's cached $script:CurrentOceanstorSession session will be used
 
    .PARAMETER InputObject
        One or more OceanStorStoragePool objects, pipeline-able.
 
    .PARAMETER Metric
        One or more friendly metric names (see Get-DMPerformanceIndicatorMap). Defaults to
        Get-DMPerformance's own default set when omitted.
 
    .PARAMETER SampleCount
        Number of samples to take. Defaults to 1.
 
    .PARAMETER IntervalSeconds
        Delay between samples when SampleCount is greater than 1. Defaults to 5.
 
    .INPUTS
        OceanStorStoragePool
 
    .OUTPUTS
        System.Collections.ArrayList
 
    .EXAMPLE
        PS> Get-DMstoragePool | Get-DMStoragePoolPerformance
 
    .NOTES
        Filename: Get-DMStoragePoolPerformance.ps1
    #>

    [CmdletBinding()]
    [OutputType([System.Collections.ArrayList])]
    param(
        [Parameter(ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
        [pscustomobject]$WebSession,

        [Parameter(Mandatory = $true, Position = 0, ValueFromPipeline = $true)]
        [object[]]$InputObject,

        [Parameter(Mandatory = $false)]
        [ArgumentCompleter({
                param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameters)
                (Get-DMPerformanceIndicatorMap).Keys | Where-Object { $_ -like "$wordToComplete*" }
            })]
        [ValidateScript({
                $validNames = (Get-DMPerformanceIndicatorMap).Keys
                foreach ($metricName in $_) {
                    if ($metricName -notin $validNames) {
                        throw "Unknown performance metric '$metricName'. Valid metrics: $($validNames -join ', ')"
                    }
                }
                return $true
            })]
        [string[]]$Metric,

        [Parameter(Mandatory = $false)]
        [int]$SampleCount = 1,

        [Parameter(Mandatory = $false)]
        [int]$IntervalSeconds = 5
    )

    begin {
        $session = if ($WebSession) { $WebSession } else { $script:CurrentOceanstorSession }
        $ids = [System.Collections.Generic.List[string]]::new()
    }

    process {
        foreach ($obj in $InputObject) {
            if ($obj -isnot [OceanStorStoragePool]) {
                throw "Get-DMStoragePoolPerformance: InputObject must be an OceanStorStoragePool object."
            }
            $ids.Add($obj.Id)
        }
    }

    end {
        if ($ids.Count -eq 0) { return }

        $params = @{ WebSession = $session; ObjectType = 'StoragePool'; ObjectId = @($ids) }
        if ($PSBoundParameters.ContainsKey('Metric')) { $params.Metric = $Metric }

        for ($s = 0; $s -lt $SampleCount; $s++) {
            Get-DMPerformance @params
            if ($s -lt ($SampleCount - 1)) { Start-Sleep -Seconds $IntervalSeconds }
        }
    }
}