Improving performance for a WAN deployment

 

Updated: May 13, 2016

Applies To: System Center 2012 SP1 - Data Protection Manager, System Center 2012 - Data Protection Manager

If your deployment of System Center 2012 – Data Protection Manager (DPM) for disaster recovery requires DPM to send large amounts of data over a WAN, you can improve DPM’s use of your WAN latency by adjusting the following registry settings:

On the remote DPM server:

HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\TcpWindowSize

HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\TcpWindowSize\Tcp1323Opts

On the DPM server:

HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\TcpWindowSize\Tcp1323Opts

For example, using the following settings over a 100 Mbps link with 40 ms latency produces the following results:

Settings
On the remote DPM server: HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\TcpWindowSize	524288
On both DPM servers: HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\TcpWindowSize\Tcp1323Opts	3
Results
One job running	3.45 MB/sec
Three jobs running	~3.00 MB/sec per job