Measure-DedupFileMetadata

Measures deduplication metadata for files in a set of folders on the same volume.

Syntax

Measure-DedupFileMetadata
       [-Path] <String[]>
       [-AsJob]
       [-CimSession <CimSession[]>]
       [-ThrottleLimit <Int32>]
       [-Confirm]
       [-WhatIf]

Description

The Measure-DedupFileMetadata cmdlet measures deduplication metadata for files in a set of folders on the same volume. The DedupDistinctSize value that this cmdlet returns indicates how much disk space you can reclaim on a volume if you delete a group of folders and then run a Garbage Collection job.

Files often have chunks that are shared across other folders. The deduplication engine calculates which chunks are unique and would be deleted after the Garbage Collection job.

Examples

Example 1: Measure potential disk space on a volume

PS C:\>Measure-DedupFileMetadata -Path "X:\A_Data","X:\Archive1"

This command measures potential disk space that you can reclaim on all folders in the paths X:\A_Data and X:\Archive1.

Parameters

-AsJob

Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete.

The cmdlet immediately returns an object that represents the job and then displays the command prompt. You can continue to work in the session while the job completes. To manage the job, use the *-Job cmdlets. To get the job results, use the Receive-Job cmdlet.

For more information about Windows PowerShell background jobs, see about_Jobs.

Type:SwitchParameter
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-CimSession

Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet.

Type:CimSession[]
Aliases:Session
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-Confirm

Prompts you for confirmation before running the cmdlet.

Type:SwitchParameter
Position:Named
Default value:False
Accept pipeline input:False
Accept wildcard characters:False
-Path

Specifies an array of paths to folders.

Type:String[]
Position:1
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-ThrottleLimit

Specifies the maximum number of concurrent operations that can be established to run the cmdlet. If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer. The throttle limit applies only to the current cmdlet, not to the session or to the computer.

Type:Int32
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-WhatIf

Shows what would happen if the cmdlet runs. The cmdlet is not run.

Type:SwitchParameter
Position:Named
Default value:False
Accept pipeline input:False
Accept wildcard characters:False