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Measure-DedupFileMetadata

Updated: January 4, 2013

Applies To: Windows Server 2012

Measure-DedupFileMetadata

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

Syntax

Parameter Set: Measure0
Measure-DedupFileMetadata [-Path] <String[]> [-AsJob] [-CimSession <CimSession[]> ] [-ThrottleLimit <Int32> ] [-Confirm] [-WhatIf] [ <CommonParameters>]




Detailed 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.

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.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-CimSession<CimSession[]>

Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.


Aliases

Session

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Path<String[]>

Specifies an array of paths to folders.


Aliases

none

Required?

true

Position?

1

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-ThrottleLimit<Int32>

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.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Confirm

Prompts you for confirmation before running the cmdlet.


Required?

false

Position?

named

Default Value

false

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-WhatIf

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


Required?

false

Position?

named

Default Value

false

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

<CommonParameters>

This cmdlet supports the common parameters: -Verbose, -Debug, -ErrorAction, -ErrorVariable, -OutBuffer, and -OutVariable. For more information, see    about_CommonParameters.

Inputs

The input type is the type of the objects that you can pipe to the cmdlet.

Outputs

The output type is the type of the objects that the cmdlet emits.

Examples

Example 1: Measure potential disk space on a volume

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


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

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