Combine multiple BLG files from perfmon into one file

# remove old files
if (test-path "counters.txt" ) { Remove-Item "counters.txt" }
if (Test-Path "counters_filtered.txt" ) { Remove-Item "counters_filtered.txt" }
if (Test-Path "allday.blg" ) { Remove-Item "allday.blg" }

$files = ls -Filter *.blg

$arguments = ""

foreach ($file in $files)
{
    write-host $file.Name

    $arguments += "$($file.name) "



}

$arguments += "-o allday.blg"

# combine all files
Write-Host "** Combining all logs"
write-host "relog $arguments"

Start-Process -Wait relog -ArgumentList $arguments

#relog $arguments


# query the counters in the file
Write-Host "** Querying counters"
relog allday.blg -q -o counters.txt

# filter only counters needed server1 or server2
Write-Host "** Filtering counters for only needed servers"
gc .\counters.txt | where { $_ -ilike "*server1*" } | Out-File -FilePath "counters_filtered.txt" -Append -Encoding ascii
gc .\counters.txt | where { $_ -ilike "*server2*" } | Out-File -FilePath "counters_filtered.txt" -Append -Encoding ascii

# strip useless counters from the allday file

write-host "Creating allday_filtered.blg"
relog "allday.blg" -cf "counters_filtered.txt" -o "allday_filtered.blg"