无法使用Get-StatType找到datastore.totalReadLatency.average

Question

我想找一个数据存储的延迟。

下面是代码

$vmName = ""

$stat = "datastore.totalReadLatency.average","datastore.totalWriteLatency.average"
$entity = Get-VM -Name $vmName | select -Unique
$start = (Get-Date).AddHours(-1)

$dsTab = @{}
$dsTab = Get-Datastore | Where {$_.Type -eq "VMFS"} | %{
  $key = $_.ExtensionData.Info.Vmfs.Uuid
  if(!$dsTab.ContainsKey($key)){
    $dsTab.Add($key,$_.Name)
  }
  else{
    "Datastore $($_.Name) with UUID $key already in hash table"
  }
}

Get-Stat -Entity $entity -Stat $stat -Start $start |
Group-Object -Property {$_.Entity.Name} | %{
  $vmName = $_.Values[0]
  $VMReadLatency = $_.Group |
    where {$_.MetricId -eq "datastore.totalReadLatency.average"} |
    Measure-Object -Property Value -Average |
    Select -ExpandProperty Average
  $VMWriteLatency = $_.Group |
    where {$_.MetricId -eq "datastore.totalWriteLatency.average"} |
    Measure-Object -Property Value -Average |
    Select -ExpandProperty Average
  $VMReadIOPSAverage = $_.Group |
    where {$_.MetricId -eq "datastore.numberReadAveraged.average"} |
    Measure-Object -Property Value -Average |
    Select -ExpandProperty Average
  $VMWriteIOPSAverage = $_.Group |
    where {$_.MetricId -eq "datastore.numberWriteAveraged.average"} |
    Measure-Object -Property Value -Average |
    Select -ExpandProperty Average
  $_.Group | Group-Object -Property Instance | %{
    New-Object PSObject -Property @{
      VM = $vmName
      Host = $_.Group[0].Entity.Host.Name
      Datastore = $dsTab[$($_.Values[0])]
      Start = $start
      DSReadLatencyAvg = [math]::Round(($_.Group | 
          where {$_.MetricId -eq "datastore.totalReadLatency.average"} |
          Measure-Object -Property Value -Average |
          Select -ExpandProperty Average),2)
      DSWriteLatencyAvg = [math]::Round(($_.Group | 
          where {$_.MetricId -eq "datastore.totalWriteLatency.average"} |
          Measure-Object -Property Value -Average |
          Select -ExpandProperty Average),2)
      VMReadLatencyAvg = [math]::Round($VMReadLatency,2)
      VMWriteLatencyAvg = [math]::Round($VMWriteLatency,2)
      VMReadIOPSAvg = [math]::Round($VMReadIOPSAverage,2)
      VMWriteIOPSAvg = [math]::Round($VMWriteIOPSAverage,2)
    }
  }
} | Export-Csv c:\report.csv -NoTypeInformation -UseCulture

当我检查任何数据存储时，我无法找到stat "datastore.totalReadLatency.average"，"datastore.totalWriteLatency.average"。

请让我知道我做错了什么，或者有什么需要做的(任何更新/安装)。

Answer 1

运行您的

Get-Stat -Entity $entity -Stat $stat -Start $start

在PowerCLI v12.4中，我看到了如下所示的错误，并且没有返回数据

度量计数器"datastore.totalreadlatency.average“不存在于实体<$vmname>

这使我来到了这条线，在那里，解决方案代码看起来与您的很接近。无论如何，使用-Realtime似乎可以修复最后一个小时的场景。我不确定在最近的版本中是否有什么变化，或者什么。

没有找到这个文档，但是当指定了Get-Stat时，-Realtime似乎忽略了-Realtime。所以试试

Get-Stat -Entity $entity -Stat $stat -Realtime

(也许您从线程中的第一个答案中获取了$stat定义，但从接受的答案中获取了其余的代码？您正在尝试解析numberReadAveraged & numberWriteAveraged的结果，而不收集这些结果。)

为了超越实时/最后一小时，您需要为totalReadLatency和totalWriteLatency收集totalReadLatency3或更高版本。增加stat级别将增加vCenter db。