HP Remote Graphics Software 6.0 User Guide

Rgreceiver.IsGlobalImageUpdateEnabled.IsMutable=bool （1）
If set to 1, the Receiver updates the area of the screen with the extents of all the areas of the screen
that have changed. If set to 0, the Receiver limits updates of the screen to just the areas that have
changed, using individual update rectangles.
If image updates in the Remote Display Window show image tearing, setting the value to 1 (enabling
global image updates) may reduce the tearing. Tearing usually occurs on large images that are
updated quite frequently, such as a 3D object being rotated in a large window. Setting the property
value to 0 (disabling global image updates) is usually best for large Remote Display Windows (5120 x
1024 resolution) that display mostly text based applications. The default value is 0—global image
updates are disabled.
NOTE: The following property enables RGS performance optimization in high-latency network
environments.
Rgreceiver.MaxImageUpdateRequests=int （4）
Rgreceiver.MaxImageUpdateRequests.IsMutable=bool （1）
This property controls the maximum number of outstanding image update requests between the RGS
Receiver (requestor) and the RGS Sender (responder).
This property enables performance optimization in high-latency network environments. For example,
setting this property to 2 will allow the Receiver to issue a second image update request to the
Sender prior to receiving the previous image update response. This allows the Sender and Receiver
to operate more in parallel—but at the potential expense of increased network bandwidth
consumption.
The Receiver can have up to 4 image update requests outstanding at any given time. When image
update response #1 is received (meaning that there are now 3 outstanding image update requests),
the Receiver can issue image update request #5 (again, up to a maximum of 4 outstanding image
update requests at any given time).
NOTE: TCP will temporarily block the Sender from sending further data if the Receiver network
buffer becomes full.
The default property value of 4 was determined empirically as a good compromise for both low and
high-latency network environments. Larger numbers of outstanding requests may be beneficial in
some cases depending on the number and types of updates occurring. In high-latency network
environments, HP recommends that you characterize RGS performance for different values of the
Rgreceiver.MaxImageUpdateRequests property.
Rgreceiver.IsMouseSyncEnabled=bool （1）
Rgreceiver.IsMouseSyncEnabled.IsMutable=bool （1）
This property allows the RGS Receiver to track an instantaneous programmatic move of the mouse
on the sender. This type of move is occasionally seen when a window is moved or resized. It is also
seen when the Snap To box is checked in the Mouse Properties Pointer Options dialog on the
Windows Sender computer (see
Figure 8-4 Pointer Options tab in the Sender Mouse Properties
dialog on page 125). Checking of the Snap To box causes the Sender mouse pointer to be
automatically moved to the default button in a dialog box.
124 Chapter 8 RGS properties