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Copy-DPMDatasourceReplica

  • Reference
Module:
DataProtectionManager

Creates a new copy of the replica of the data source.

Syntax

Copy-DPMDatasourceReplica
    [-Datasource] <Datasource>
    [-WhatIf]
    [-Confirm]
    [<CommonParameters>]
Copy-DPMDatasourceReplica
    -Line

Description

Note

A new optional parameter [-CheckReplicaFragmentation] is included in DPM 2019 UR1. For more information, see Parameters.

The Copy-DPMDatasourceReplica cmdlet creates a new copy of the DPM datasource on System Center - Data Protection Manager. This cmdlet must be run only when there are high backup latencies for backups due to replica fragmentation. Run the below command to verify the number of extents and identify fragmentation level.

No. of extents = fsutil file queryExtents <replica_filename> | Measure-Object -Line

Compare the number of extents with replica_file_size/refs_cluster_size (refs_cluster_size can be 4K or 64K). If the value for number of extents is close enough to the above value, cmdlet Copy-DPMDatasourceReplica can be used to defrag the replica.

Consider the following while using this cmdlet

Storage

Make sure storage pool has enough free space available to create a new copy of replica. Further, there will be a storage bloat until the older recovery points get pruned.

Datasource Make sure the data source is idle and is not undergoing any operation such as backup, recovery etc. If data source is in any state other than idle. the copy of replica is not allowed.

Fragmentation

Post replica copy is created, ensure the fragmentation is not present by using fsutil command as explained above.

Examples

Example 1

PS C:\> $pg = Get-DPMProtectionGroup -DPMServerName "TestingServer"

This command gets the list of all protection groups on the DPM server named TestingServer.

Example 2

PS C:\> $ds = Get-DPMDatasource -ProtectionGroup $pg[<index>]

This command gets the list of all data sources within $pg[<index>].

Example 3

PS C: \>   Copy-DPMDatasourceReplica -Datasource $ds[<index>]

This command creates a copy of the replica for $ds[<index>].

Parameters

-CheckReplicaFragmentation

Calculates the fragmentation percentage for a replica.

Note

This parameter is applicable for DPM 2019 UR1.

Type:SwitchParameter
Position:1
Default value:None
Required:True
Accept pipeline input:False
Accept wildcard characters:False

-Confirm

Prompts you for confirmation before running the cmdlet.

Type:SwitchParameter
Aliases:cf
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-Datasource

Specifies a data source object for which this cmdlet removes a replica and creates a new copy of replica.

A data source can be a file system share or volume for the Windows operating system, Microsoft SQL Server database, Microsoft Exchange Server storage group, Microsoft SharePoint farm, Microsoft Virtual Machine, System Center 2019 - Data Protection Manager (DPM) database, or system state that is a member of a protection group. To obtain a datasource object, use the cmdlet Get-DPMDatasource cmdlet.

Type:Datasource
Position:0
Default value:None
Required:True
Accept pipeline input:True
Accept wildcard characters:False

-WhatIf

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

Type:SwitchParameter
Aliases:wi
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

Inputs

Microsoft.Internal.EnterpriseStorage.Dls.UI.ObjectModel.OMCommon.Datasource

Outputs

System.Object