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New-DedupSchedule

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

New-DedupSchedule

Creates a data deduplication schedule.

Syntax

Parameter Set: Create0
New-DedupSchedule [-Name] <String> [-Type] <Type> [-AsJob] [-CimSession <CimSession[]> ] [-Days <DayOfWeek[]> ] [-Disable] [-DurationHours <UInt32> ] [-Full] [-InputOutputThrottleLevel <InputOutputThrottleLevel> ] [-Memory <UInt32> ] [-Priority <Priority> ] [-ReadOnly] [-Start <DateTime> ] [-StopWhenSystemBusy] [-ThrottleLimit <Int32> ] [ <CommonParameters>]




Detailed Description

The New-DedupSchedule cmdlet creates a data deduplication schedule. This cmdlet returns a DeduplicationSchedule object that you can use to customize the data deduplication schedule. This cmdlet uses default settings to create a data deduplication schedule for the parameters that you do not specify.

You can create a schedule to run the following types data deduplication jobs:

-- Optimization: This type of job performs both deduplication and compression of files according data deduplication policy for the volume. After initial optimization of a file, if that file is then modified and again meets the data deduplication policy threshold for optimization, the file is optimized again.
-- GarbageCollection: This job processes deleted or modified data on the volume so that any data chunks that are no longer referenced are cleaned up. Garbage collection jobs process previously deleted or logically overwritten optimized content to create usable volume free space. When an optimized file is deleted or overwritten by new data, the old data in the chunk store is not immediately deleted. Garbage collection is scheduled to run weekly by default. Garbage collection is a processing-intensive operation, so you should allow the deletion load to reach a threshold and then manually run this job type, or schedule it for off hours.
-- Scrubbing: This job processes data corruptions it finds during data integrity validation, performs possible corruption repair, and generates a scrubbing report.
-- Unoptimization: This job undoes data deduplication on all of the optimized files on the volume. At the end of a successful unoptimization job, the server deletes all of the data deduplication metadata from the volume.

For more information, see Install and Configure Data Deduplication (http://technet.microsoft.com/en-us/library/hh831434.aspx) on TechNet.

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

-Days<DayOfWeek[]>

Specifies an array of days of the week on which the server runs the data deduplication job. The acceptable values for this parameter are: 
-- Monday
-- Tuesday
-- Wednesday
-- Thursday
-- Friday
-- Saturday
-- Sunday


Aliases

none

Required?

false

Position?

named

Default Value

Monday,Tuesday,Wednesday,Thursday,Friday,Saturday,Sunday

Accept Pipeline Input?

True (ByPropertyName)

Accept Wildcard Characters?

false

-Disable

Indicates that the server disables the data deduplication schedule immediately after you create it. The server does not run the data deduplication schedule at the time that you specify in the Start parameter. After you disable a data deduplication schedule, you can use the Set-DedupSchedule cmdlet to enable the schedule.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

True (ByPropertyName)

Accept Wildcard Characters?

false

-DurationHours<UInt32>

Specifies the number of hours that the server runs the task before canceling it. The value 0 indicates that the server runs the job to completion. This cmdlet safely stops a data deduplication job and does not affect the files that the server is processing when it cancels the job.


Aliases

none

Required?

false

Position?

named

Default Value

2

Accept Pipeline Input?

True (ByPropertyName)

Accept Wildcard Characters?

false

-Full

If you specify GarbageCollection for the Type parameter:
Indicates that garbage collection jobs free up all deleted or unreferenced data on the volume. If you do not specify this parameter, garbage collection jobs free up space after a system threshold of delete data is exceeded. We recommend that you run garbage collection regularly without specifying this parameter, and then once a month specify this parameter and run garbage collection again.

If you specify Scrubbing for the Type parameter:
Indicates that scrubbing jobs validate the integrity of all data on the volume. If you do not specify this parameter, the scrubbing job validates only critical metadata and data integrity issues that data deduplication previously encountered. We recommend that you run scrubbing regularly without specifying this parameter, and then once a month specify this parameter and run scrubbing again.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

True (ByPropertyName)

Accept Wildcard Characters?

false

-InputOutputThrottleLevel<InputOutputThrottleLevel>

Specifies the amount of I/O throttling that the job provides to ensure that the job does not interfere with other I/O-intensive processes. The acceptable values for this parameter are: 

-- None
-- Low
-- Medium
-- High


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Memory<UInt32>

Specifies the maximum percentage of physical computer memory that the data deduplication job can use.

For optimization jobs, we recommend that you set a range from 15 to 50, and a higher memory consumption for jobs that you schedule to run when you specify the StopWhenSystemBusy parameter. For garbage collection and scrubbing jobs, which you typically schedule to run in off hours, you can set a higher memory consumption, such as 50.


Aliases

MaximumMemoryPercentage

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

True (ByPropertyName)

Accept Wildcard Characters?

false

-Name<String>

Specifies a name for the data deduplication job schedule.


Aliases

none

Required?

true

Position?

1

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Priority<Priority>

Sets the CPU and I/O priority for the optimization job that you run by using this cmdlet. For jobs that you run when you specify the StopWhenSystemBusy parameter, we recommend that you set this parameter to High. For typical optimization jobs, we recommend that you set this parameter to Normal.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

True (ByPropertyName)

Accept Wildcard Characters?

false

-ReadOnly

Indicates that the scrubbing job processes and reports on corruptions that it finds but does not run any repair actions.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

True (ByPropertyName)

Accept Wildcard Characters?

false

-Start<DateTime>

Specifies a time to start this job. The default value is 1:45am.

Type the date in a format that is standard for the system locale, such as dd-MM-yyyy (German [Germany]) or MM/dd/yyyy (English [United States]).


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

True (ByPropertyName)

Accept Wildcard Characters?

false

-StopWhenSystemBusy

Indicates that the server stops the job when the system is busy and retries later. We recommend that you specify this parameter when you set a low priority for the job.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

True (ByPropertyName)

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

-Type<Type>

Specifies the type of data deduplication job. The acceptable values for this parameter are: 
-- Optimization
-- GarbageCollection
-- Scrubbing
-- Unoptimization


Aliases

none

Required?

true

Position?

2

Default Value

Optimization

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.DateTime
  • System.DayOfWeek[]
  • System.Management.Automation.SwitchParameter
  • System.UInt32
  • Microsoft.PowerShell.Cmdletization.GeneratedTypes.DedupSchedule.Priority
  • Microsoft.PowerShell.Cmdletization.GeneratedTypes.DedupSchedule.Type

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.


Examples

Example 1: Create a data deduplication schedule for a garbage collection job

This command creates a data deduplication schedule for a garbage collection job named OffHoursGC. The job is scheduled to run on Sundays at 8:00 at normal priority. The command specifies that the server cancels the job after 5 hours if the process has not ended.


PS C:\> New-DedupSchedule –Name "OffHoursGC" –Type GarbageCollection –Start 08:00 –DurationHours 5 –Days Sun –Priority Normal

Example 2: Create a data deduplication schedule for a scrubbing job

This command creates a data deduplication schedule for a scrubbing job named OffHoursScrub. The command starts the scrubbing job at 23:00 on Monday through Friday at normal priority. The StopWhenSystemBusy parameter specifies that the server stops the job when the system is busy and retries later. The DurationHours parameter specifies that the server cancels the job after 6 hours if the process has not ended.


PS C:\> New-DedupSchedule –Name "OffHoursScrub" –Type Scrubbing –Start 23:00 –StopWhenSystemBusy –DurationHours 6 –Days Mon,Tues,Wed,Thurs,Fri –Priority Normal

Example 3: Create a data deduplication schedule for an optimization job

This command creates a data deduplication schedule for an optimization job named MyWeekdayOptimization. The optimization job runs at a normal priority every weekday evening at 8:00. DurationHours specifies that the server cancels the job after 9 hours if the process has not ended.


PS C:\> New-DedupSchedule –Name "MyWeekendOptimization" –Type Optimization –Days Mon,Tues,Wed,Thurs,Fri –Start 08:00 –DurationHours 9

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