Split and strip SQL Server ERRORLOG file

Split-ErrorLog.ps1

# just a draft, need massive polishing :)
cls;
$reader = new-object System.IO.StreamReader("ERRORLOG")

$count = 1
$numlines = 0
$fileName = "{0}{1}.{2}" -f ("ERRORLOG_stripped_", $count, "txt")
while(($line = $reader.ReadLine()) -ne $null)
{
	if ((++$numlines % 1000) -eq 0) { Write-Output "Processed $numlines lines" }
    if (!($line -match "Login succeeded*" -or $line -match "Login failed*" -or $line -match "Error: 18456*"))
	#if (!($line -match "I/O is frozen*" -or $line -match "I/O was resumed*" -or $line -match "Database backed up.*"))
	{
		Add-Content -path $fileName -value $line
	}
    if((Get-ChildItem -path $fileName).Length -ge 10MB)
    {
        ++$count
		$fileName = "{0}{1}.{2}" -f ("ERRORLOG_stripped_", $count, "txt")
    }
}

$reader.Close()