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Get-DedupMetadata

Brian Lich|Last Updated: 3/26/2017

SYNOPSIS

Returns metadata for volumes that have data deduplication metadata.

SYNTAX

Get-DedupMetadata [[-Volume] <String[]>] [-CimSession <CimSession[]>] [-ThrottleLimit <Int32>] [-AsJob]
 [<CommonParameters>]

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.

Because this cmdlet must scan the entire file system. this cmdlet requires some time to run.

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 start this cmdlet, then this cmdlet fails. It also fails if there is not enough memory for the file system scan and cmdlet processing. If the cmdlet fails, 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 properties:

  • 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.

EXAMPLES

Example 1: Get metadata for a volume

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

This command gets metadata for the D: 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.

Type: SwitchParameter
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-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.

Type: CimSession[]
Parameter Sets: (All)
Aliases: Session

Required: False
Position: Named
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
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-Volume

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

Type: String[]
Parameter Sets: (All)
Aliases: Path, Name, DeviceId

Required: False
Position: 0
Default value: None
Accept pipeline input: True (ByPropertyName)
Accept wildcard characters: False

CommonParameters

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

INPUTS

System.String[]

OUTPUTS

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.

NOTES

Measure-DedupFileMetadata

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