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December 6, 2016 15:03
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get-folder sizes
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#requires -version 2 | |
<# | |
.SYNOPSIS | |
Gets folder sizes using COM and by default with a fallback to robocopy.exe, with the | |
logging only option, which makes it not actually copy or move files, but just list them, and | |
the end summary result is parsed to extract the relevant data. | |
There is a -ComOnly parameter for using only COM, and a -RoboOnly parameter for using only | |
robocopy.exe with the logging only option. | |
The robocopy output also gives a count of files and folders, unlike the COM method output. | |
The default number of threads used by robocopy is 8, but I set it to 16 since this cut the | |
run time down to almost half in some cases during my testing. You can specify a number of | |
threads between 1-128 with the parameter -RoboThreadCount. | |
Both of these approaches are apparently much faster than .NET and Get-ChildItem in PowerShell. | |
The properties of the objects will be different based on which method is used, but | |
the "TotalBytes" property is always populated if the directory size was successfully | |
retrieved. Otherwise you should get a warning (and the sizes will be zero). | |
Online "blog" documentation: http://www.powershelladmin.com/wiki/Get_Folder_Size_with_PowerShell,_Blazingly_Fast | |
BSD 3-clause license. http://www.opensource.org/licenses/BSD-3-Clause | |
Copyright (C) 2015, Joakim Svendsen | |
All rights reserved. | |
Svendsen Tech. | |
.PARAMETER Path | |
Path or paths to measure size of. | |
.PARAMETER Precision | |
Number of digits after decimal point in rounded numbers. | |
.PARAMETER RoboOnly | |
Do not use COM, only robocopy, for always getting full details. | |
.PARAMETER ComOnly | |
Never fall back to robocopy, only use COM. | |
.PARAMETER RoboThreadCount | |
Number of threads used when falling back to robocopy, or with -RoboOnly. | |
Default: 16 (gave the fastest results during my testing). | |
.EXAMPLE | |
. .\Get-FolderSize.ps1 | |
PS C:\> 'C:\Windows', 'E:\temp' | Get-FolderSize | |
.EXAMPLE | |
Get-FolderSize -Path Z:\Database -Precision 2 | |
.EXAMPLE | |
Get-FolderSize -Path Z:\Database -RoboOnly -RoboThreadCount 64 | |
.EXAMPLE | |
Get-FolderSize -Path Z:\Database -RoboOnly | |
.EXAMPLE | |
Get-FolderSize A:\FullHDFloppyMovies -ComOnly | |
#> | |
function Get-FolderSize { | |
[CmdletBinding()] | |
param( | |
[Parameter(Mandatory=$true, | |
ValueFromPipeline=$true, | |
ValueFromPipelineByPropertyName=$true)] | |
[string[]] $Path, | |
[int] $Precision = 4, | |
[switch] $RoboOnly, | |
[switch] $ComOnly, | |
[ValidateRange(1, 128)] [byte] $RoboThreadCount = 16) | |
begin { | |
if ($RoboOnly -and $ComOnly) { | |
Write-Error -Message "You can't use both -ComOnly and -RoboOnly. Default is COM with a fallback to robocopy." -ErrorAction Stop | |
} | |
if (-not $RoboOnly) { | |
$FSO = New-Object -ComObject Scripting.FileSystemObject -ErrorAction Stop | |
} | |
function Get-RoboFolderSizeInternal { | |
[CmdletBinding()] | |
param( | |
# Paths to report size, file count, dir count, etc. for. | |
[string[]] $Path, | |
[int] $Precision = 4) | |
begin { | |
if (-not (Get-Command -Name robocopy -ErrorAction SilentlyContinue)) { | |
Write-Warning -Message "Fallback to robocopy failed because robocopy.exe could not be found. Path '$p'. $([datetime]::Now)." | |
return | |
} | |
} | |
process { | |
foreach ($p in $Path) { | |
Write-Verbose -Message "Processing path '$p' with Get-RoboFolderSizeInternal. $([datetime]::Now)." | |
$RoboCopyArgs = @("/L","/S","/NJH","/BYTES","/FP","/NC","/NDL","/TS","/XJ","/R:0","/W:0","/MT:$RoboThreadCount") | |
[datetime] $StartedTime = [datetime]::Now | |
[string] $Summary = robocopy $p NULL $RoboCopyArgs | Select-Object -Last 8 | |
[datetime] $EndedTime = [datetime]::Now | |
[regex] $HeaderRegex = '\s+Total\s*Copied\s+Skipped\s+Mismatch\s+FAILED\s+Extras' | |
[regex] $DirLineRegex = 'Dirs\s*:\s*(?<DirCount>\d+)(?:\s*\d+){3}\s*(?<DirFailed>\d+)\s*\d+' | |
[regex] $FileLineRegex = 'Files\s*:\s*(?<FileCount>\d+)(?:\s*\d+){3}\s*(?<FileFailed>\d+)\s*\d+' | |
[regex] $BytesLineRegex = 'Bytes\s*:\s*(?<ByteCount>\d+)(?:\s*\d+){3}\s*(?<BytesFailed>\d+)\s*\d+' | |
[regex] $TimeLineRegex = 'Times\s*:\s*(?<TimeElapsed>\d+).*' | |
[regex] $EndedLineRegex = 'Ended\s*:\s*(?<EndedTime>.+)' | |
if ($Summary -match "$HeaderRegex\s+$DirLineRegex\s+$FileLineRegex\s+$BytesLineRegex\s+$TimeLineRegex\s+$EndedLineRegex") { | |
$TimeElapsed = [math]::Round([decimal] ($EndedTime - $StartedTime).TotalSeconds, $Precision) | |
New-Object PSObject -Property @{ | |
Path = $p | |
TotalBytes = [decimal] $Matches['ByteCount'] | |
TotalMBytes = [math]::Round(([decimal] $Matches['ByteCount'] / 1MB), $Precision) | |
TotalGBytes = [math]::Round(([decimal] $Matches['ByteCount'] / 1GB), $Precision) | |
BytesFailed = [decimal] $Matches['BytesFailed'] | |
DirCount = [decimal] $Matches['DirCount'] | |
FileCount = [decimal] $Matches['FileCount'] | |
DirFailed = [decimal] $Matches['DirFailed'] | |
FileFailed = [decimal] $Matches['FileFailed'] | |
TimeElapsed = $TimeElapsed | |
StartedTime = $StartedTime | |
EndedTime = $EndedTime | |
} | Select Path, TotalBytes, TotalMBytes, TotalGBytes, DirCount, FileCount, DirFailed, FileFailed, TimeElapsed, StartedTime, EndedTime | |
} | |
else { | |
Write-Warning -Message "Path '$p' output from robocopy was not in an expected format." | |
} | |
} | |
} | |
} | |
} | |
process { | |
foreach ($p in $Path) { | |
Write-Verbose -Message "Processing path '$p'. $([datetime]::Now)." | |
if (-not (Test-Path -Path $p -PathType Container)) { | |
Write-Warning -Message "$p does not exist or is a file and not a directory. Skipping." | |
continue | |
} | |
# We know we can't have -ComOnly here if we have -RoboOnly. | |
if ($RoboOnly) { | |
Get-RoboFolderSizeInternal -Path $p -Precision $Precision | |
continue | |
} | |
$ErrorActionPreference = 'Stop' | |
try { | |
$StartFSOTime = [datetime]::Now | |
$TotalBytes = $FSO.GetFolder($p).Size | |
$EndFSOTime = [datetime]::Now | |
if ($TotalBytes -eq $null) { | |
if (-not $ComOnly) { | |
Get-RoboFolderSizeInternal -Path $p -Precision $Precision | |
continue | |
} | |
else { | |
Write-Warning -Message "Failed to retrieve folder size for path '$p': $($Error[0].Exception.Message)." | |
} | |
} | |
} | |
catch { | |
if ($_.Exception.Message -like '*PERMISSION*DENIED*') { | |
if (-not $ComOnly) { | |
Write-Verbose "Caught a permission denied. Trying robocopy." | |
Get-RoboFolderSizeInternal -Path $p -Precision $Precision | |
continue | |
} | |
else { | |
Write-Warning "Failed to process path '$p' due to a permission denied error: $($_.Exception.Message)" | |
} | |
} | |
Write-Warning -Message "Encountered an error while processing path '$p': $_" | |
continue | |
} | |
$ErrorActionPreference = 'Continue' | |
New-Object PSObject -Property @{ | |
Path = $p | |
TotalBytes = [decimal] $TotalBytes | |
TotalMBytes = [math]::Round(([decimal] $TotalBytes / 1MB), $Precision) | |
TotalGBytes = [math]::Round(([decimal] $TotalBytes / 1GB), $Precision) | |
DirCount = $null | |
FileCount = $null | |
DirFailed = $null | |
FileFailed = $null | |
TimeElapsed = [math]::Round(([decimal] ($EndFSOTime - $StartFSOTime).TotalSeconds), $Precision) | |
StartedTime = $StartFSOTime | |
EndedTime = $EndFSOTime | |
} | Select Path, TotalBytes, TotalMBytes, TotalGBytes, DirCount, FileCount, DirFailed, FileFailed, TimeElapsed, StartedTime, EndedTime | |
} | |
} | |
end { | |
if (-not $RoboOnly) { | |
[void][System.Runtime.Interopservices.Marshal]::ReleaseComObject($FSO) | |
} | |
[gc]::Collect() | |
[gc]::WaitForPendingFinalizers() | |
} | |
} | |
$a = gci "J:\Users" | select fullname | |
$a.Fullname | Get-FolderSize | Select-Object Path, TotalMBytes | Export-Csv -NoTypeInformation -Path .\report.csv | |
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