Using PowerCLI for VM disk Stats

First of all - it's really a message to LucD (I know from previous aid tends to prowl this forum ), just thought I'd share, as is all the useful info and any idea LucD at will without doubt be useful for all.

Hi LucD,

First of all - thanks for a great selection of posts on Reporting for Powershell vSphere - well worth the time and a have read for anyone.

http://www.lucd.info/2009/12/30/PowerCLI-vSphere-statistics-part-1-the-basics/

http://www.lucd.info/2010/01/05/PowerCLI-vSphere-statistics-part-2-come-together/comment-page-1/#comments

I'm certainly not a good PowerShell - but I was able to understand and make changes to my profit - so I thought I would share my findings and ask a few questions.

With your script as a basis - I was able to reach the following which SHOULD let me look at all VMs in VC one statistics collect virtual disk in time for VMS different discs, (IOPS / s, Throuput and latency) I use VC 4.1 and and NFS storage attached, I believe that these statistics are OK but would have your insight on this.

I am very pleased with the script - but he needs more tests on a valid site, rather than my region little test, but I'm sure that from a point of view 'PS' there is more efficiency to win.

First of all - is it possible to get all the statistics at a time-, rather than to make 6 calls per VM? (I'm also sure that the ' += ' a stat the following may not be ideal)

Also - is there a way can control the output to the CSV file, it seems to put the columns in order any, he loves and layout does not appear to be linked to the order of a group object? Can it be controlled so I can have the entries 'value' and 'unit' next to each other

Any insight and assistance would be appreciated, and I hope that others will give it a try and let me know if it works for them too.

Thanks again for the inspiration and the vision that made me this far

Tony.

ESX 4.1, VC 4.1, 2.0 options, PowerCLI 4.1.1

# Main Variables

$sVCentre = "IP VC.

$sVCUser = "administrator@domain".

$sVCPwd = "password"

$strVMWildCard = «*»

$strCSVName = "Stats-AvgVMDiskWriteStatsWorkingday.

$strCSVLocation = "c:\". »

# define the start and end times for a day's work.

$today9am = (get-Date-time Minute 9 - 0 - 0 second)

$today5pm = (get-Date-time Minute 17 - 0 - 0 second)

$intStartDay = - 1

$intEndDay = - 1

# Begin script

#Connect to the CR

Connect-VIServer $sVCentre - $sVCUser of the username-password $sVCPwd - ea silentlycontinue

$arrVMs = get - VM | WHERE-object {$_.} Name - like $strVMWildCard}

foreach ($strVM to $arrVMs)

{

Write-Host "get stats for:" $strVM.Name

Write-Host "'-Assembly of latency of writing Stats" "

$stats += get-Stat - $strVM - Stat virtualDisk.totalWriteLatency.average entity - start $today9am. AddDays ($intStartDay) - finish $today5pm. AddDays ($intEndDay)

Write-Host "'-bringing together reading latency statistics '"

$stats += get-Stat - $strVM - Stat virtualDisk.totalReadLatency.average entity - start $today9am. AddDays ($intStartDay) - finish $today5pm. AddDays ($intEndDay)

Write-Host "'-Assembly Stats ARE Ops / s reading" "

$stats += get-Stat - $strVM - Stat virtualDisk.numberReadAveraged.average entity - start $today9am. AddDays ($intStartDay) - finish $today5pm. AddDays ($intEndDay)

Write-Host "'-writing ARE Ops / s Collator Stats" "

$stats += get-Stat - $strVM - Stat virtualDisk.numberWriteAveraged.average entity - start $today9am. AddDays ($intStartDay) - finish $today5pm. AddDays ($intEndDay)

Write-Host "'-Assembly Read Throughput Stats" "

$stats += get-Stat - $strVM - Stat virtualDisk.read.average entity - start $today9am. AddDays ($intStartDay) - finish $today5pm. AddDays ($intEndDay)

Write-Host "'-writing flow Stats of collation" "

$stats += get-Stat - $strVM - Stat virtualDisk.write.average entity - start $today9am. AddDays ($intStartDay) - finish $today5pm. AddDays ($intEndDay)

Write-Host $stats.length

# include data and gather stats on average for the day.

} $groups = $stats | Group-object - property {$_.} Entity, $_. MetricId, $_. Instance}

$report = $groups | % {

New-object PSObject-property @ {}

Description = $_. Group [0]. Description

Entity = $_. Group [0]. Entity

EntityId = $_. Group [0]. EntityId

Instance = $_. Group [0]. Instance

MetricId = $_. Group [0]. MetricId

Timestamp = $_. Group [0]. Timestamp.Date.AddHours ($_.) Group [0]. Timestamp.Hour)

Unit = $_. Group [0]. Unit

Value = [math]: Round (($_.)) Group | Measure-object-propriete value - average). On average, 2)

}

#Exporting the report to a CSV file.

$strCSVSuffix = (get-date) m:System.NET.SocketAddress.ToString ('yyyyMMddhhmm')

$strCSVFile = $strCSVLocation + $strCSVName + $strCSVSuffix + "_", ".csv".

$report | Export-Csv $strCSVfile - NoTypeInformation - UseCulture

Thank you, Tony.

(1) Yes, you can call Get-Stat with several characteristics, the downside is that the results will be mixed and you'll need to extract the correct metric/value objects. What's even better, you can also move all the virtual machines in a single call to Get-Stat.

(2) the Export-Csv does not specify the order of the columns in the .csv file, I'm afraid.

The alternative is to write or build the .csv file yourself.

Capture each line as you like it in a string, and then write that string to a file.

This is the update script

# Main Variables $sVCentre = "VC IP" $sVCUser = "administrator@domain" $sVCPwd = "password" $strVMWildCard = "*" $strCSVName = "Stats-AvgVMDiskWriteStatsWorkingday" $strCSVLocation = "c:\"
$metrics = "virtualDisk.totalWriteLatency.average","virtualDisk.totalReadLatency.average",
    "virtualDisk.numberReadAveraged.average","virtualDisk.numberWriteAveraged.average",
    "virtualDisk.read.average","virtualDisk.write.average" # define the start and finish times for a working day. $today9am = (Get-Date -Hour 9 -Minute 0 -Second 0)
$today5pm = (Get-Date -Hour 17 -Minute 0 -Second 0)
$intStartDay = -1$intEndDay = -1## Begin Script

#Connect to VCConnect-VIServer $sVCentre -User $sVCUser -Password $sVCPwd -ea silentlycontinue$arrVMs = Get-VM | where-object {$_.Name -like $strVMWildCard}
$stats = Get-Stat -Entity $arrVMs -Stat $metrics -Start $today9am.AddDays($intStartDay) -Finish $today5pm.AddDays($intEndDay)
# group the data and collate the stats into averages for the day.$groups = $stats | Group-Object -Property {$_.Entity, $_.MetricId, $_.Instance}
$report = $groups | % {
    New-Object PSObject -Property @{
        Description = $_.Group[0].Description
        Entity = $_.Group[0].Entity
        EntityId = $_.Group[0].EntityId
        Instance = $_.Group[0].Instance
        MetricId = $_.Group[0].MetricId
        Timestamp = $_.Group[0].Timestamp.Date.AddHours($_.Group[0].Timestamp.Hour)
        Unit = $_.Group[0].Unit
        Value = [math]::Round(($_.Group | Measure-Object -Property Value -Average).Average, 2)
    }
}
#Exporting the report to a CSV file.$strCSVSuffix = (get-date).toString('yyyyMMddhhmm')
$strCSVFile = $strCSVLocation + $strCSVName + "_" + $strCSVSuffix + ".csv"$report | Export-Csv $strCSVfile -NoTypeInformation -UseCulture

Tags: VMware

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