Switch-​Sql​Availability​Group

Starts a failover of an availability group to a secondary replica.

Syntax

Switch-SqlAvailabilityGroup
      [-InputObject] <AvailabilityGroup[]>
      [-AllowDataLoss]
      [-Force]
      [-Script]
      [-Confirm]
      [-WhatIf]
      [<CommonParameters>]
Switch-SqlAvailabilityGroup
      [[-Path] <String[]>]
      [-AllowDataLoss]
      [-Force]
      [-Script]
      [-Confirm]
      [-WhatIf]
      [<CommonParameters>]

Description

The Switch-SqlAvailabilityGroup cmdlet starts a failover of an availability group to a specified secondary replica. Run this cmdlet on the target secondary replica. After the failover, the secondary replica becomes the primary replica.

Examples

Example 1: Fail over an availability group

PS C:\> Switch-SqlAvailabilityGroup -Path "SQLSERVER:\Sql\SecondaryServer\InstanceName\AvailabilityGroups\MainAG"

This command performs a manual failover of the availability group MainAG to the server instance named SecondaryServer\InstanceName. This command does not allow data loss. Run this command on the server instance that hosts the secondary replica to which to fail over.

Example 2: Force an availability group to fail over

PS C:\> Switch-SqlAvailabilityGroup -Path "SQLSERVER:\Sql\SecondaryServer\InstanceName\AvailabilityGroups\MainAG" -AllowDataLoss

This command performs a manual failover of the availability group MainAG to the server instance named SecondaryServer\InstanceName. The command specifies the AllowDataLoss parameter. Therefore, the failover has the potential of data loss, and the command prompts you for confirmation. Specify the Force parameter to skip the confirmation.

Example 3: Create a script to fail over an availability group

PS C:\>Switch-SqlAvailabilityGroup -Path "SQLSERVER:\Sql\SecondaryServer\InstanceName\AvailabilityGroups\MainAG" -Script

This command creates a Transact-SQL script that performs a manual failover of the availability group MainAG to the server instance named SecondaryServer\InstanceName. The script does not allow data loss. The command does not cause failover.

Required Parameters

-InputObject

Specifies availability group that this cmdlet fails over.

Type:AvailabilityGroup[]
Position:2
Default value:None
Accept pipeline input:True (ByValue)
Accept wildcard characters:False

Optional Parameters

-AllowDataLoss

Indicates that this cmdlet starts a forced failover to the target secondary replica. Data loss is possible. Unless you specify the Force or Script parameter, the cmdlet prompts you for confirmation.

Type:SwitchParameter
Position:Named
Default value:None
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:False
Accept pipeline input:False
Accept wildcard characters:False
-Force

Forces the command to run without asking for user confirmation. This cmdlet prompts you for confirmation only if you specify the AllowDataLoss parameter.

Type:SwitchParameter
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-Path

Specifies the path of the availability group that this cmdlet fails over. If you do not specify this parameter, this cmdlet uses current working location.

Type:String[]
Position:2
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-Script

Indicates that this cmdlet returns a Transact-SQL script that performs the task that this cmdlet performs.

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

Inputs

Microsoft.SqlServer.Management.Smo.AvailabilityGroup

You can pass an availability group to this cmdlet.