Check the size of SharePoint 2010 sites using PowerShell

One of those “it may come in useful one day” scripts. It walks through a site hierarchy in SharePoint 2010, reports the size of each one, and then displays a total size for all sites reported. It uses the concepts of the code specified in this article, which calculates the size of a site by adding up the contents of each folder within it.

UPDATE 29th October 2010: Modified the script to include all subfolders – thanks to Steven Wu for pointing it out.

To use, first run the following script:

function GetWebSizes ($StartWeb)
{
    $web = Get-SPWeb $StartWeb
    [long]$total = 0
    $total += GetWebSize -Web $web
    $total += GetSubWebSizes -Web $web
    $totalInMb = ($total/1024)/1024
    $totalInMb = "{0:N2}" -f $totalInMb
    $totalInGb = (($total/1024)/1024)/1024
    $totalInGb = "{0:N2}" -f $totalInGb
    write-host "Total size of all sites below" $StartWeb "is" $total "Bytes,"
    write-host "which is" $totalInMb "MB or" $totalInGb "GB"
    $web.Dispose()
}

function GetWebSize ($Web)
{
    [long]$subtotal = 0
    foreach ($folder in $Web.Folders)
    {
        $subtotal += GetFolderSize -Folder $folder
    }
    write-host "Site" $Web.Title "is" $subtotal "KB"
    return $subtotal
}

function GetSubWebSizes ($Web)
{
    [long]$subtotal = 0
    foreach ($subweb in $Web.GetSubwebsForCurrentUser())
    {
        [long]$webtotal = 0
        foreach ($folder in $subweb.Folders)
        {
            $webtotal += GetFolderSize -Folder $folder
        }
        write-host "Site" $subweb.Title "is" $webtotal "Bytes"
        $subtotal += $webtotal
        $subtotal += GetSubWebSizes -Web $subweb
    }
    return $subtotal
}

function GetFolderSize ($Folder)
{
    [long]$folderSize = 0 
    foreach ($file in $Folder.Files)
    {
        $folderSize += $file.Length;
    }
    foreach ($fd in $Folder.SubFolders)
    {
        $folderSize += GetFolderSize -Folder $fd
    }
    return $folderSize
}

Once you have run the script, you can call it with the following PowerShell command:

GetWebSizes -StartWeb <StartURL>

Using a start URL allows you to perform a size check from any site in the hierarchy – not just the top level site. In the example below, I ran it against the URL http://portal, but could also choose to run it from a sub-site, if required:

PS C:\> GetWebSizes -StartWeb http://portal
Site Intranet is 12763801 KB
Site Hello is 581759 Bytes
Site Team Site is 604175 Bytes
Total size of all sites below http://portal is 13949735 Bytes,
which is 13.30 MB or 0.01 GB