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Get-DedupMetadata

Windows Server 2012 R2 and Windows 8.1

Updated: October 17, 2013

Applies To: Windows 8.1, Windows PowerShell 4.0, Windows Server 2012 R2

Get-DedupMetadata

Returns a DeduplicationMetadata object for every volume that has data deduplication metadata.

Syntax

Parameter Set: Query (cdxml)
Get-DedupMetadata [[-Volume] <String[]> ] [-AsJob] [-CimSession <CimSession[]> ] [-ThrottleLimit <Int32> ] [ <CommonParameters>]




Detailed Description

The Get-DedupMetadata cmdlet returns a DeduplicationMetadata object for every volume that has optimization metadata. A DeduplicationMetadata object includes read-only properties describing the nature of the deduplication data store such as chunk counts, container counts, average chunk size, and other statistics.

This cmdlet can some time to run since the entire file system must be scanned.

This cmdlet cannot be part of a schedule; it must be run manually. If another optimization job is running on the specified volume when you kick of this cmdlet, then this cmdlet will fail. It will also fail if there is not enough memory for the file system scan and cmdlet processing. If this happens, then review the events and log files for more information.

To run this cmdlet, you must start Windows PowerShell® with the Run as administrator option.

This cmdlet returns the following:
- DataChunkCount: Indicates the number of data chunks in a container.
- DataContainerCount: Indicates the number of containers in the data store.
- DataChunkAverageSize: Indicates the data store size (not including chunk metadata) divided by the total number of data chunks in the data store.
- StreamMapCount: Indicates the number of data streams in a container.
- StreamMapContainerCount: Indicates the number of containers in the stream map store.
- StreamMapAverageChunkCount: Indicates the stream map store size divided by the total number of streams in the store.
- HotspotCount: Indicates the number of hotspots in a container.
- HotspotContainerCount: Indicates the number of hotspots in the stream map store.
- CorruptionCount: Indicates the number of corruptions found on the volume.

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

-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

-Volume<String[]>

Specifies one or more file system volumes for which to return a DeduplicationVolumeMetadata object.


Aliases

Path,Name,DeviceId

Required?

false

Position?

1

Default Value

none

Accept Pipeline Input?

True (ByPropertyName)

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.

  • System.String[]

Outputs

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

  • Microsoft.Management.Infrastructure.CimInstance

    The Microsoft.Management.Infrastructure.CimInstance object is a wrapper class that displays Windows Management Instrumentation (WMI) objects. The path after the pound sign (#) provides the namespace and class name for the underlying WMI object.


  • Microsoft.Management.Infrastructure.CimInstance#ROOT/Microsoft/Windows/Deduplication/MSFT_DedupVolumeMetadata

    The Microsoft.Management.Infrastructure.CimInstance object is a wrapper class that displays Windows Management Instrumentation (WMI) objects. The path after the pound sign (#) provides the namespace and class name for the underlying WMI object.


Examples

Example 1: Get metadata for a volume

This command gets metadata for the D: volume.


PS C:\> Get-DedupMetadata -Volume "D:"

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