Server.AffinityInfo Property

Gets the AffinityInfo object that is associated with an instance of SQL Server.

Namespace:  Microsoft.SqlServer.Management.Smo
Assembly:  Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)


<SfcObjectAttribute(SfcObjectRelationship.ChildObject, SfcObjectCardinality.One)> _
Public ReadOnly Property AffinityInfo As AffinityInfo 
Dim instance As Server 
Dim value As AffinityInfo 

value = instance.AffinityInfo
[SfcObjectAttribute(SfcObjectRelationship.ChildObject, SfcObjectCardinality.One)]
public AffinityInfo AffinityInfo { get; }
[SfcObjectAttribute(SfcObjectRelationship::ChildObject, SfcObjectCardinality::One)]
property AffinityInfo^ AffinityInfo {
    AffinityInfo^ get ();
[<SfcObjectAttribute(SfcObjectRelationship.ChildObject, SfcObjectCardinality.One)>]
member AffinityInfo : AffinityInfo
function get AffinityInfo () : AffinityInfo

Property Value

Type: Microsoft.SqlServer.Management.Smo.AffinityInfo
The AffinityInfo object for specified instance of SQL Server.


To get AffinityInfo object properties, users can be a member of the public fixed server role.

To set any AffinityInfo object properties and run the Alter method, users must have ALTER permission on the database.

To create a AffinityInfo object, users must have ALTER ANY APPLICATION role permission on the parent database.

To drop an AffinityInfo object, users must be the owner of the application role or have ALTER ANY APPLICATION role permission on the parent database.

To grant, deny, and revoke permission on the AffinityInfo object, users must have CONTROL permission on the application role.


The following example shows how to set all the CPUs on an instance of SQL Server to hard affinity.

Visual Basic

using System;
using Microsoft.SqlServer.Management.Smo;

namespace samples
    class Program
        static void Main(string[] args)
            Server dbServer = new Server("(local)");
            dbServer.AffinityInfo.Cpus[1].AffinityMask = true;
            dbServer.AffinityInfo.AffinityType = AffinityType.Manual;

            foreach (Cpu cpu in dbServer.AffinityInfo.Cpus)
                cpu.AffinityMask = true;



$dbServer = new-Object Microsoft.SqlServer.Management.Smo.Server("(local)")
$dbServer.AffinityInfo.AffinityType = [Microsoft.SqlServer.Management.Smo.AffinityType]'Manual'

foreach ($cpu In $dbServer.AffinityInfo.Cpus)
   $cpu.AffinityMask = $True

See Also


Server Class

Microsoft.SqlServer.Management.Smo Namespace

Other Resources

Best Practices for Running SQL Server on Computers That Have More Than 64 CPUs