Calculating snaps sizes with PowerShell

[storageguy]

Team,

I am trying to calculate the snaps size total of volumes name with common pattern. It works fine when all the snaps size are in GB but doesn't work when there are mixed sizes such as MB and KB. My code

$mypattern = read-host "Please enter common pattern to search the volumes (a sample pattern may like 'cluster_a_store') "
[int] $snaps2del = read-host "Please enter number of snaps to delete "
Get-NcVol | ?{ $_.Name -match $mypattern} |Foreach {
$measure = Get-NcSnapshot $_.Name |sort-object -Property Created -Descending |select-object -Last $snaps2del | Measure-Object Total -Sum }
$totalSpace = ConvertTo-FormattedNumber $measure.Sum DataSize "0.0"
Write-Host "Space recovered by deleting those snaps will be: " $totalSpace -ForegroundColor Yellow

Thanks

[GidonMarcus · Accepted solution]

Hi

i palyed with it a bit and i get accurate results i think. can you share your output ?

PS C:\Windows\system32> Get-NcVol -Controller $g | select -last 1| Get-NcSnapshot | select -last 9

Name                      Volume               Vserver                   Created      Total Cumulative Dependency                    
----                      ------               -------                   -------      ----- ---------- ----------                    
hourly.2018-10-07_1405    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     8.8 GB    36.3 GB                               
hourly.2018-10-07_1505    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     7.1 MB    36.3 GB                               
hourly.2018-10-07_1605    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018    16.9 MB    36.3 GB                               
hourly.2018-10-07_1705    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     7.6 MB    36.3 GB                               
hourly.2018-10-07_1805    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     7.2 MB    36.4 GB                               
hourly.2018-10-07_1905    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     2.0 MB    36.4 GB                               
hourly.2018-10-07_2005    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     1.1 MB    36.4 GB                               
hourly.2018-10-07_2105    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018   916.0 KB    36.4 GB                               
hourly.2018-10-07_2205    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     4.9 MB    36.4 GB busy                          



PS C:\Windows\system32> $mysum = (Get-NcVol -Controller $g | select -last 1| Get-NcSnapshot | select -last 9 | Measure-Object Total -Sum).Sum

PS C:\Windows\system32> ConvertTo-FormattedNumber $mysum DataSize "0.000"
8.845 GB

PS C:\Windows\system32> Get-NcVol -Controller $g | select -last 1| Get-NcSnapshot | select -last 12

Name                      Volume               Vserver                   Created      Total Cumulative Dependency                    
----                      ------               -------                   -------      ----- ---------- ----------                    
hourly.2018-10-07_1105    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     6.3 MB    27.5 GB                               
hourly.2018-10-07_1205    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     6.8 MB    27.5 GB                               
hourly.2018-10-07_1305    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018    11.5 MB    27.5 GB                               
hourly.2018-10-07_1405    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     8.8 GB    36.3 GB                               
hourly.2018-10-07_1505    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     7.1 MB    36.3 GB                               
hourly.2018-10-07_1605    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018    16.9 MB    36.3 GB                               
hourly.2018-10-07_1705    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     7.6 MB    36.3 GB                               
hourly.2018-10-07_1805    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     7.2 MB    36.4 GB                               
hourly.2018-10-07_1905    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     2.0 MB    36.4 GB                               
hourly.2018-10-07_2005    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     1.1 MB    36.4 GB                               
hourly.2018-10-07_2105    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018   916.0 KB    36.4 GB                               
hourly.2018-10-07_2205    SVMSVMSVM_SVMSVM... SVMSVMSVM             07/10/2018     4.9 MB    36.4 GB busy                          


PS C:\Windows\system32> $mysum = (Get-NcVol -Controller $g | select -last 1| Get-NcSnapshot | select -last 12 | Measure-Object Total -Sum).Sum

PS C:\Windows\system32> ConvertTo-FormattedNumber $mysum DataSize "0.000"
8.869 GB

PS C:\Windows\system32> #calc the diffrence between the SUMs
PS C:\Windows\system32> 69-45
24


PS C:\Windows\system32> #calc the added snapshot form the last output total.. 
PS C:\Windows\system32> 6.3+6.8+11.5
24.6

[storageguy]

Thanks for looking into this GidonMarcus.

You are selecting snaps from one volume. My question is oldest 3 snaps from each volume matches my pattern. I figured it that closing curly bracket for "foreach" loop was in the wrong place and I wasn't getting the each volume total added to full total. My modified version.

$mypattern = read-host "Please enter common pattern to search the volumes (a sample pattern may like 'cluster_a_store') "
[int] $snaps2del = read-host "Please enter number of snaps to delete "
[long]$measure = 0
[long]$snapsTotal = 0
Get-NcVol | ?{ $_.Name -match $mypattern -and $_.Name -NotMatch "vault"} |Foreach {
$measure = (Get-NcSnapshot $($_.Name) |sort-object -Property Created -Descending |select-object -Last $snaps2del | Measure-Object Total -Sum).sum
$snapsTotal = $measure + $snapsTotal }
$totalSpace = ConvertTo-FormattedNumber $snapsTotal DataSize "0.00"
Write-Host "Space recovered by deleting those snaps will be: " $totalSpace -ForegroundColor Yellow

Thanks again for your time.