Average read get-stat - virtualdisk.read.average stat?
Hi all
I want to use the metric virtualdisk.read.average to calculate the average read speeds per virtual disk to a virtual computer in the last 24 hours (using the 5 min interval)
[1]
I want to calculate the average in * every * instance and then add these individual averages until you get the desired amount.
For example (using real-time output just for example only, I want 24 hours actually):
MetricId unit Insta timestamp value
NCE
-------- --------- ----- ---- -----
VirtualDisk.Read.Ave... 13/05/2011 19:39 6 Kbps scsi0:0
VirtualDisk.Read.Ave... 13/05/2011 19:38:40 Kbps 11 scsi0:0
VirtualDisk.Read.Ave... 13/05/2011 19:38:20 KBps 39 scsi0:0
VirtualDisk.Read.Ave... 13/05/2011 19:38 431 Kbps scsi0:0
VirtualDisk.Read.Ave... 13/05/2011 19:39 10 Kbps scsi0:1
VirtualDisk.Read.Ave... 13/05/2011 19:38:40 Kbps 0 scsi0:1
VirtualDisk.Read.Ave... 13/05/2011 19:38:20 5 kbps scsi0:1
VirtualDisk.Read.Ave... 13/05/2011 19:38 0 Kbps scsi0:1
Average (6 + 11 + 39 + 431) = 121.75
average (10 + 0 + 5 + 0) = 3.75
Total liked: 121.75 + 3.75 = 125,5
What is the best way to achieve this? (Unfortunately there is no global instance as with the network and cpu.usagemhz parameters)
[2]
For the calculation of the IOPS / s, if you use the metric datastore.*, OR as the virtualdisk.*, is the following statement, 100% good:
(a) virtualDisk.number [Read |] Write] Averaged.Average will calculate the OPS are / s generated by the virtual machine
(b) disk.number [Read |] Write] .summation will calculate the OPS are / s that hit this particular data store (useful to see how busy is a data store - but will not provide any info on a single virtual machine (unless by chance, there is only a virtual computer on this data store special))
[3]
How to use virtualDisk.number [Read |] Write] calculate the IOPS / s for a given virtual machine? Depending on the issue [1], to each VMDK, PAHO are / s on average individually and then add the averages for overall IOPS generated by this virtual machine in the last 24 hours?
Concerning
marc0
Kind regards
marc0
[1] use the Group-Object and Measure-Object cmdlets for this.
For example
$vm = Get-VM MyVM $report = @() $stats = Get-Stat -Entity $vm -Stat virtualdisk.read.average -Start (Get-Date).AddHours(-12) $stats | Group-Object -Property Instance | %{ $row = "" | Select Instance,Average $row.Instance = $_.Group[0].Instance $row.Average = ($stats | Measure-Object -Property Value -Average).Average $report += $row} $report $total = ($report | Measure-Object -Property Average -Sum).Sum Write-Host $vm.Name $total
This will calculate the averages per virtual disk and add the averages together
[2] see my post get PAHO are / s maximum .
(a) Yes, provided that you add the OPS are / s for each virtual disk total
(b) No, if you run the Get-Stat for an entity that is a virtual machine, you will get the statistics for this specific VM disk.
The metric is available for HostSystem and VirtualMachine. See the column of the entity in the drive settings page.
[3] Yes
Tags: VMware
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Code
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$out. MEMAvg = [Math]: round ((($_ |)) Get-Stat - Stat mem.usage.average - Start (Get-Date). AddDays(-1) | Measure - Object - average value). (Average), 2)
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Cannot convert value '(' type 'System.Int32'. '. Error: "input string is not well-formed."
D:\Scripts\T.ps1:6 tank: 58
+ $out. UC = (Get-view $_). Hardware.CpuInfo.NumCpuCores + < < < < "(" + [math]: Tower ((Get-vue $_).)) " Hardware.CpuInf
o.Hz / 1000000000, 1) + ") Ghz»
+ CategoryInfo: NotSpecified: (:)) [], RuntimeException)
+ FullyQualifiedErrorId: RuntimeExceptionCannot convert value 'GB' to type 'System.Double '. Error: "input string is not well-formed."
D:\Scripts\T.ps1:7 tank: 72
+ $out. MEM = [math]: Tower ((Get-vue $_).) Hardware.MemorySize / 1 GB, 0) + < < < < 'GB '.
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+ FullyQualifiedErrorId: RuntimeExceptionYou try to add strings and integers.
Try it like this
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These data are available in the Extensiondata property.
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