Powershell countdown on servers?

Grey

If I have a foreach running on 20 servers, and I want to display a countdown for the run, decrementing the count each time, how would that work? I have:

$quantity = $systems.count
foreach ($server in $systems){
//stuff
$newquant = $quantity-1
}

This always returns a fixed value, though.

JaredBusch

@Grey said in Powershell countdown on servers?:

If I have a foreach running on 20 servers, and I want to display a countdown for the run, decrementing the count each time, how would that work? I have:
$quantity = $systems.count
foreach ($server in $systems){
//stuff
$newquant = $quantity-1
}
This always returns a fixed value, though.

Because you never change $quantity

JaredBusch

$quantity = $systems.count
foreach ($server in $systems){
//stuff
$quantity = $quantity-1
}

Grey

@JaredBusch said in Powershell countdown on servers?:

@Grey said in Powershell countdown on servers?:
If I have a foreach running on 20 servers, and I want to display a countdown for the run, decrementing the count each time, how would that work? I have:
$quantity = $systems.count
foreach ($server in $systems){
//stuff
$newquant = $quantity-1
}
This always returns a fixed value, though.
Because you never change $quantity

$newquant is where I want to do the math, inside the foreach.

Romo

@Grey $quantity inside the loop will never change to any other value other than $quantity - 1. So if quantity is originally defined as 5 you $newquant will always be 4, no matter how many times your loop runs as you currently have it now.

As @JaredBusch mentions you need to decrement $quantity to actually have a counter.

dafyre

@Grey said in Powershell countdown on servers?:

If I have a foreach running on 20 servers, and I want to display a countdown for the run, decrementing the count each time, how would that work? I have:
$quantity = $systems.count
foreach ($server in $systems){
//stuff
$newquant = $quantity-1
}
This always returns a fixed value, though.

If youw ant to do it absolutely with $newquantity, then do this...

$quantity = $systems.count
$newquantity = $quantity

foreach ($server in $systems){
//stuff
$newquantity = $newquantity-1
}

Grey

@dafyre said in Powershell countdown on servers?:

@Grey said in Powershell countdown on servers?:
If I have a foreach running on 20 servers, and I want to display a countdown for the run, decrementing the count each time, how would that work? I have:
$quantity = $systems.count
foreach ($server in $systems){
//stuff
$newquant = $quantity-1
}
This always returns a fixed value, though.
If youw ant to do it absolutely with $newquantity, then do this...
$quantity = $systems.count
$newquantity = $quantity

foreach ($server in $systems){
//stuff
$newquantity = $newquantity-1
}

Testing this now.

dafyre

Are you doing this so you can have a progress bar or what?

Grey

@dafyre said in Powershell countdown on servers?:

Are you doing this so you can have a progress bar or what?

Positive feedback on a script that's iterating actions on a group of servers, so... kind of a progress bar.

dafyre

@Grey said in Powershell countdown on servers?:

@dafyre said in Powershell countdown on servers?:

Are you doing this so you can have a progress bar or what?

Positive feedback on a script that's iterating actions on a group of servers, so... kind of a progress bar.

if ($newquantity -eq 0) {
 write-host "We're done, everybody go home!"
}

Grey

@dafyre said in Powershell countdown on servers?:

@Grey said in Powershell countdown on servers?:

@dafyre said in Powershell countdown on servers?:

Are you doing this so you can have a progress bar or what?

Positive feedback on a script that's iterating actions on a group of servers, so... kind of a progress bar.
if ($newquantity -eq 0) {
 write-host "We're done, everybody go home!"
}

Oh, fun! I hadn't considered the end. I'm more of a Tron guy so ... End of Line.

Obsolesce

You need to tell it to subtract first:

$quantity = $systems.Count

foreach ($server in $systems) {

    Write-Output "Quantity is: [$quantity]"
    $quantity--
    $newquant = $quantity
    Write-Output "`tNEW quantity is: [$newquant]"

}

JaredBusch

@Obsolesce said in Powershell countdown on servers?:

You need to tell it to subtract first:

$quantity = $systems.Count

foreach ($server in $systems) {

    Write-Output "Quantity is: [$quantity]"
    $quantity--
    $newquant = $quantity
    Write-Output "`tNEW quantity is: [$newquant]"

}

The point is there is never a need for $newquantity

Obsolesce

@JaredBusch said in Powershell countdown on servers?:

@Obsolesce said in Powershell countdown on servers?:
You need to tell it to subtract first:
$quantity = $systems.Count

foreach ($server in $systems) {

    Write-Output "Quantity is: [$quantity]"
    $quantity--
    $newquant = $quantity
    Write-Output "`tNEW quantity is: [$newquant]"

}
The point is there is never a need for $newquantity

I gathered he knows that, but still wants it in there.

Obsolesce

@Grey said in Powershell countdown on servers?:

$newquant = $quantity-1
This always returns a fixed value, though.

Do it like this:

$newquant = --$quantity

1337

@Grey

If you wanted to show the progress % you could do something like this as well:

$quantity = $systems.count
$i = 0

foreach ($server in $systems){
   //stuff
   $i = $i + 1
   $progress = 100 * $i / $quantity
}

Another trick is to not count it at all, just print a dot (".") for each iteration.
.........

Grey

@Pete-S said in Powershell countdown on servers?:

@Grey

If you wanted to show the progress % you could do something like this as well:
$quantity = $systems.count
$i = 0

foreach ($server in $systems){
   //stuff
   $i = $i + 1
   $progress = 100 * $i / $quantity
}
Another trick is to not count it at all, just print a dot (".") for each iteration.
.........

Tested and this needs a try/catch for a divide by zero. The math is also off.

Obsolesce

@Grey said in Powershell countdown on servers?:

@Pete-S said in Powershell countdown on servers?:
@Grey

If you wanted to show the progress % you could do something like this as well:
$quantity = $systems.count
$i = 0

foreach ($server in $systems){
   //stuff
   $i = $i + 1
   $progress = 100 * $i / $quantity
}
Another trick is to not count it at all, just print a dot (".") for each iteration.
.........
Tested and this needs a try/catch for a divide by zero. The math is also off.

This is how I would do the progress bar:

$systems = Get-Process #for my testing purposes

$quantity = $systems.Count
$progressCount = 0
foreach ($server in $systems) {
    $progressCount++
    Write-Progress -Activity "Processing..." -Status "System: $($server.Name)" -PercentComplete ($progressCount/$systems.Count*100)
    $newquant = --$quantity
    Start-SLeep -Milliseconds 20 #added for testing so I can see the progress bar
}

In my example, I used $systems = Get-Process for testing.

Edit: Change $($server.Name) to the property or info you want.

1337

@Grey said in Powershell countdown on servers?:

@Pete-S said in Powershell countdown on servers?:
@Grey

If you wanted to show the progress % you could do something like this as well:
$quantity = $systems.count
$i = 0

foreach ($server in $systems){
   //stuff
   $i = $i + 1
   $progress = 100 * $i / $quantity
}
Another trick is to not count it at all, just print a dot (".") for each iteration.
.........
Tested and this needs a try/catch for a divide by zero. The math is also off.

You probably had --$quantity still in there. It decreases $quantity by one each time it executes.

But use @Obsolesce example.