cls
# Create a while loop to start the SQL jobs to execute scoring procedure in parallel

# Counter values
$StartCtr = 1
$Increment = 250000
$EndCtr = $Increment 
$FinalCount = 1195907

# Server name
$vServerName = $env:computername
# Database name
$vDatabaseName = "LendingClub"
# Formatting the string
$count = "{0:N0}" -f $FinalCount

# Start verbose output
Write-Host "Performing clean-up to start new scoring run...." -ForegroundColor Yellow

# Start Cleanup
Invoke-Sqlcmd -ServerInstance $vServerName -Database $vDatabaseName -Query "delete from [LoanPredictionsWhatIf];delete from Runtimestats;checkpoint;"


# Get What-If scenario
Write-Host "Please provide an increase in the Interest Rate that you want to model with: "
$IntRate = Read-Host
Write-Host "Requested change: " $IntRate -ForegroundColor Yellow

# Store requested rate in database
$SqlScript ="UPDATE WhatIf SET Rate = " + $IntRate
Invoke-Sqlcmd -ServerInstance $vServerName -Database $vDatabaseName -Query $SqlScript

Write-Host "Starting parallel jobs to score " $count "loans" -ForegroundColor Yellow

while ($EndCtr -le $FinalCount)
{
    $SqlScript = [ScriptBlock]::Create("Invoke-Sqlcmd -ServerInstance `"" + $vServerName + "`" -Query `"EXEC [dbo].[ScoreLoansWhatIf] " + $StartCtr + "," + $EndCtr + "," + $IntRate + "`" -Database `"$vDatabaseName`"")
    Start-Job -ScriptBlock $SqlScript 
    $StartCtr += $Increment
    $EndCtr += $Increment
}

# Wait till jobs complete
while (Get-Job -State Running)
{
       
    Start-Sleep 1
}


# Find out duration
$duration = Invoke-Sqlcmd -ServerInstance $vServerName -Database $vDatabaseName -Query "select DATEDIFF(s,MIN (Runtime), MAX(Runtime)) as RuntimeSeconds from dbo.RuntimeStats;"

Write-Host "`n"

$rate = "{0:N2}" -f ($FinalCount/$duration.RuntimeSeconds)

Write-Host "Completed scoring" $count "loans in" $duration.RuntimeSeconds "seconds at" $rate "loans/sec." -ForegroundColor Green

# Remove Jobs
Get-Job | Remove-Job