ArrayList is a good easy-to-use substitute.
$array = new-object System.Collections.ArrayList
[void]$array.Add("add this")
Nice methods:
Add
AddRange
Count
Remove
Sort
From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com]
On Behalf Of Donnie Taylor
Sent: Tuesday, August 2, 2016 6:58 am
To: powershell@lists.myitforum.com
Subject: RE: [powershell] Make GET-ACL quicker?
Runspaces - specifically, you can use invoke-parallel
(https://github.com/RamblingCookieMonster/Invoke-Parallel). I use it all
the time for multi-threading.
Something to keep in mind - += is ok for small datasets, but is pretty evil
on very large datasets. Basically, when you do a +=, it doesn't just add to
the array, it deletes the array and recreates it with the new member.
Probably doesn't matter for an ACL list on a file, but if you are working
with hundreds of thousands of items, it can hurt performance pretty bad.
From: listsad...@lists.myitforum.com <mailto:listsad...@lists.myitforum.com>
[mailto:listsad...@lists.myitforum.com] On Behalf Of Todd, Jason
Sent: Tuesday, August 02, 2016 4:33 AM
To: powershell@lists.myitforum.com <mailto:powershell@lists.myitforum.com>
Subject: [EXTERNAL] [powershell] Make GET-ACL quicker?
Hello All,
I'm hoping someone can help me out with making GET-ACL quicker?
Scenario:
I need to use Get-Acl on over 1million files and folders in a directory
root, and then filter on just the ones which have Inheritance set to $false.
This is my current code (which take days to run!):
## Loop each file and folder in RootPath
Foreach ($Item in $FilesAndFolders){
TRY{
Write-Verbose -message "[TRY] Getting ACLs for: $item" -verbose
$ACLs = get-acl $Item.fullname | ForEach-Object {$_.Access}
Foreach ($ACL in $ACLs){
$ObjectOut = New-Object -TypeName PsObject
$ObjectOut | Add-Member -MemberType NoteProperty -Name "Path"
-Value $Item.FullName.ToString()
$ObjectOut | Add-Member -MemberType NoteProperty -Name
"IdentityReference" -Value $ACL.IdentityReference.ToString()
$ObjectOut | Add-Member -MemberType NoteProperty -Name
"AccessControlType" -Value $ACL.AccessControlType.ToString()
$ObjectOut | Add-Member -MemberType NoteProperty -Name
"InheritanceFlags" -Value $ACL.InheritanceFlags
$ObjectOut | Add-Member -MemberType NoteProperty -Name
"PropagationFlags" -Value $ACL.PropagationFlags
$ObjectOut | Add-Member -MemberType NoteProperty -Name
"FileSystemRights" -Value $ACL.FileSystemRights.ToString()
$ObjectOut | Add-Member -MemberType NoteProperty -Name
"IsInherited" -Value $ACL.IsInherited
$ACLList += $ObjectOut
}
}
CATCH{
Write-Warning "[CATCH] ERROR getting ACL for $($item.fullname)"
-Verbose
$ACLErrorsLog += "ERROR getting ACL for $($item.fullname)"
}
Does anyone know a way to speed up the getting of ACL's, maybe by filtering
out the non-inherited objects ?
Any help much appreciated!
Thank you,
Jason
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